{"id":4609,"date":"2026-01-29T11:19:37","date_gmt":"2026-01-29T03:19:37","guid":{"rendered":"https:\/\/niusheng.gg13.globaldeepsea.site\/comprehensive-guide-protocol-data-units-types\/"},"modified":"2026-01-29T11:19:37","modified_gmt":"2026-01-29T03:19:37","slug":"comprehensive-guide-protocol-data-units-types","status":"publish","type":"post","link":"https:\/\/www.newsunn.com\/ja\/comprehensive-guide-protocol-data-units-types\/","title":{"rendered":"\u30d7\u30ed\u30c8\u30b3\u30eb \u30c7\u30fc\u30bf \u30e6\u30cb\u30c3\u30c8\u3068\u305d\u306e\u30bf\u30a4\u30d7\u306e\u5305\u62ec\u7684\u306a\u30ac\u30a4\u30c9"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/statics.mylandingpages.co\/static\/aaanxdmf26c522mpaaaaz2wwe7ppkact\/image\/7dd1f2b0eda34e49995ce8453c7adf82.webp\" alt=\"\u30d7\u30ed\u30c8\u30b3\u30eb \u30c7\u30fc\u30bf \u30e6\u30cb\u30c3\u30c8\u3068\u305d\u306e\u30bf\u30a4\u30d7\u306e\u5305\u62ec\u7684\u306a\u30ac\u30a4\u30c9\"><\/p>\n<p><\/p>\n<p>A PDU, or <a href=\"https:\/\/www.techtarget.com\/searchnetworking\/definition\/protocol-data-unit-PDU\" target=\"_blank\" rel=\"noopener\">\u30d7\u30ed\u30c8\u30b3\u30eb\u30c7\u30fc\u30bf\u30e6\u30cb\u30c3\u30c8<\/a>, represents the basic unit of data exchange between entities using a specific networking protocol. This definition highlights the critical role that PDUs, including the <a href=\"https:\/\/www.newsunnpdu.com\/basic-pdu\/\" target=\"_blank\" rel=\"noopener\">\u57fa\u672c\u7684\u306aPDU<\/a>, play in multilayer protocol stacks and managing protocol interactions. PDUs ensure efficient communication in various networking scenarios.<\/p>\n<p><\/p>\n<p>Key components of a PDU include the protocol header, payload, and trailer. Each component plays a vital role in the transmission and reception of data, contributing to the overall effectiveness of network communication.<\/p>\n<p><\/p>\n<h2>\u30ad\u30fc\u30c6\u30a4\u30af\u30a2\u30a6\u30c8<\/h2>\n<p><\/p>\n<ul><\/p>\n<li>A <a href=\"https:\/\/www.newsunnpdu.com\/news\/top-10-key-pdu-terms-for-it-and-networking\/\" target=\"_blank\" rel=\"noopener\">\u30d7\u30ed\u30c8\u30b3\u30eb\u30c7\u30fc\u30bf\u30e6\u30cb\u30c3\u30c8\uff08PDU)<\/a> is the basic unit of data exchanged in networking, ensuring effective communication between devices.<\/li>\n<p><\/p>\n<li>PDUs consist of three main parts: the protocol header, the payload, and the trailer, each playing a vital role in data transmission.<\/li>\n<p><\/p>\n<li>The protocol header contains important information for processing data, while the payload carries the actual user data being communicated.<\/li>\n<p><\/p>\n<li>The trailer, often optional, helps detect errors in the transmitted data, ensuring its integrity during communication.<\/li>\n<p><\/p>\n<li>Encapsulation is the process of adding headers to data at each layer of the OSI model, organizing it for transmission across networks.<\/li>\n<p><\/p>\n<li>Decapsulation is the reverse process, where headers are removed as data moves up through the network layers, making it usable.<\/li>\n<p><\/p>\n<li>Different <a href=\"https:\/\/www.newsunnpdu.com\/news\/top-10-ways-a-power-distribution-unit-pdu-works-in-modern-data-centers\/\" target=\"_blank\" rel=\"noopener\">types of PDUs<\/a> exist at various layers, such as messages at the Application layer and frames at the Data Link layer, each with unique structures.<\/li>\n<p><\/p>\n<li>Understanding PDUs helps improve network performance by optimizing data flow and ensuring reliable communication across different protocols.<\/li>\n<p><\/ul>\n<p><\/p>\n<h2>Components of a Protocol Data Unit<\/h2>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/statics.mylandingpages.co\/static\/aaanxdmf26c522mpaaaaz2wwe7ppkact\/image\/e14815af650a45d69c137c6c780b6f6d.webp\" alt=\"Components of a Protocol Data Unit\"><\/p>\n<p><\/p>\n<h3>Protocol Header<\/h3>\n<p><\/p>\n<p>The <a href=\"https:\/\/www.newsunnpdu.com\/news\/exploring-the-concept-of-protocol-data-units-in-networking\/\" target=\"_blank\" rel=\"noopener\">protocol header<\/a> serves as the initial component of a Protocol Data Unit (PDU). It contains essential information that guides the processing of the data. The header typically includes several standard fields, which vary depending on the specific protocol in use. Below is a <a href=\"https:\/\/medium.com\/@tom_84912\/protocol-types-and-what-was-uec-thinking-66b525765577\" target=\"_blank\" rel=\"noopener\">table that outlines common fields<\/a> found in a protocol header:<\/p>\n<p><\/p>\n<table><\/p>\n<thead><\/p>\n<tr><\/p>\n<th>Field Name<\/th>\n<p><\/p>\n<th>\u8aac\u660e<\/th>\n<p><\/tr>\n<p><\/thead>\n<p><\/p>\n<tbody><\/p>\n<tr><\/p>\n<td>SYN<\/td>\n<p><\/p>\n<td>Indicates a PDU establishment request.<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>next_hdr<\/td>\n<p><\/p>\n<td>Distinguishes between requests and responses, indicating the format of the subsequent data.<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>ver<\/td>\n<p><\/p>\n<td>Contains a version number for the protocol.<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>opcode<\/td>\n<p><\/p>\n<td>Determines the format of the remaining header based on the value of the next_hdr field.<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>eom<\/td>\n<p><\/p>\n<td>End of Message flag, which varies based on its state.<\/td>\n<p><\/tr>\n<p><\/tbody>\n<p><\/table>\n<p><\/p>\n<p>The protocol header plays a crucial role in error detection and correction during data transmission. Techniques such as checksums and cyclic redundancy checks (CRC) add extra data to packets, allowing devices to identify transmission issues. For instance, the IPv4 header includes a checksum that protects its contents, leading to the dropping of packets with incorrect checksums. Similarly, TCP provides a checksum for both the payload and headers, ensuring that any erroneous packets are discarded and retransmitted.<\/p>\n<p><\/p>\n<h3>\u30da\u30a4\u30ed\u30fc\u30c9<\/h3>\n<p><\/p>\n<p>The payload is the <a href=\"https:\/\/www.newsunnpdu.com\/news\/top-5-things-to-know-about-protocol-data-units-in-networking\/\" target=\"_blank\" rel=\"noopener\">core component of a PDU<\/a>, carrying the actual user data being communicated. This data can vary widely, depending on the application and protocol in use. The payload may include text, images, video packets, or other forms of data. Below is a <a href=\"https:\/\/wraycastle.com\/blogs\/knowledge-base\/network-protocol-data-unit\" target=\"_blank\" rel=\"noopener\">table summarizing the types of data<\/a> typically included in the payload of a PDU:<\/p>\n<p><\/p>\n<table><\/p>\n<thead><\/p>\n<tr><\/p>\n<th>\u6210\u5206<\/th>\n<p><\/p>\n<th>\u8aac\u660e<\/th>\n<p><\/tr>\n<p><\/thead>\n<p><\/p>\n<tbody><\/p>\n<tr><\/p>\n<td>\u30d8\u30c3\u30c0<\/td>\n<p><\/p>\n<td>Contains addressing information and protocol-specific instructions for data processing.<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>\u30da\u30a4\u30ed\u30fc\u30c9<\/td>\n<p><\/p>\n<td>Carries the actual user data being communicated, such as text or video packets.<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>\u30c8\u30ec\u30fc\u30e9\u30fc<\/td>\n<p><\/p>\n<td>Provides error-checking capabilities, including checksums or CRCs, to detect transmission errors.<\/td>\n<p><\/tr>\n<p><\/tbody>\n<p><\/table>\n<p><\/p>\n<p>The size of the payload can significantly affect network performance and throughput. Larger payloads may lead to increased transmission times, while smaller payloads can enhance efficiency. For example, a study showed that as payload length increases, the delay performance also rises, impacting overall network efficiency.<\/p>\n<p><\/p>\n<h3>\u30c8\u30ec\u30fc\u30e9\u30fc<\/h3>\n<p><\/p>\n<p>The trailer, also known as the footer, is an optional component of a PDU that appears at the end of the data unit. It provides additional data for integrity checks, ensuring the reliability of the transmitted information. The trailer typically contains error detection and correction information, such as a checksum. This information is crucial for the receiving device to confirm that the data has not been corrupted during transmission.<\/p>\n<p><\/p>\n<p>While not all PDUs contain a trailer, when present, it primarily functions for error detection. The trailer often incorporates mechanisms to identify and correct transmission errors. It includes error detection bits that help identify and correct errors during data transmission. Additionally, the trailer marks the end of the frame, aiding in frame delimitation.<\/p>\n<p><\/p>\n<h2>How Protocol Data Units Work<\/h2>\n<p><\/p>\n<p>Understanding how <a href=\"https:\/\/www.newsunnpdu.com\/news\/exploring-the-concept-of-protocol-data-units-in-networking\/\" target=\"_blank\" rel=\"noopener\">\u30d7\u30ed\u30c8\u30b3\u30eb \u30c7\u30fc\u30bf \u30e6\u30cb\u30c3\u30c8 (PDU)<\/a> function is essential for grasping the intricacies of data transmission. The processes of encapsulation and decapsulation are fundamental to the operation of PDUs within networking protocols.<\/p>\n<p><\/p>\n<h3>Encapsulation Process<\/h3>\n<p><\/p>\n<p><a href=\"https:\/\/www.networkacademy.io\/ccna\/network-fundamentals\/understanding-the-osi-model\" target=\"_blank\" rel=\"noopener\">The encapsulation process<\/a> involves wrapping data with protocol-specific headers at each layer of the OSI model. This process ensures that the data is properly formatted for transmission across the network. The steps involved in encapsulation are as follows:<\/p>\n<p><\/p>\n<ol><\/p>\n<li>At the Application layer, an HTTP header is added to the data.<\/li>\n<p><\/p>\n<li>At the Transport layer, a TCP or UDP header is added, encapsulating the data into TCP segments.<\/li>\n<p><\/p>\n<li>The segments are encapsulated with an IP header at the Network layer, which includes source and destination IP addresses.<\/li>\n<p><\/p>\n<li>A MAC header is added at the Data Link layer, containing source and destination MAC addresses.<\/li>\n<p><\/p>\n<li>Finally, the encapsulated frames are sent to the Physical layer and transmitted over the network in binary bits.<\/li>\n<p><\/ol>\n<p><\/p>\n<p>This structured approach to encapsulation not only organizes the data but also enhances its integrity during transmission. For instance, the Encapsulating Security Protocol (ESP) employs integrity check values (ICVs) calculated using cryptographic hash algorithms. These ICVs verify that the data remains unaltered during its journey across the network. When data integrity and origin authentication are necessary, ESP <a href=\"https:\/\/www.1kosmos.com\/security-glossary\/encapsulating-security-protocol-esp\/\" target=\"_blank\" rel=\"noopener\">computes an ICV using a shared secret key<\/a>, ensuring that any tampering can be detected.<\/p>\n<p><\/p>\n<h3>Decapsulation Process<\/h3>\n<p><\/p>\n<p>Decapsulation is the reverse process of encapsulation. It involves <a href=\"https:\/\/jumpcloud.com\/it-index\/what-is-decapsulation-in-networking\" target=\"_blank\" rel=\"noopener\">removing protocol headers from network packets<\/a> as they ascend through a device\u2019s network stack. This process ensures that the data reaches its intended destination in a usable format. The steps in the decapsulation process include:<\/p>\n<p><\/p>\n<ul><\/p>\n<li>The process starts at the Network Interface Card (NIC) when a packet arrives, handling Physical layer processing and initial frame validation.<\/li>\n<p><\/p>\n<li>At the Data Link layer, the frame header is examined to check if the packet is intended for the device. If the MAC addresses match, the header is removed.<\/li>\n<p><\/p>\n<li>The Network layer verifies the destination IP address and routing information, removing the IP header afterward.<\/li>\n<p><\/p>\n<li>Transport layer processing varies by protocol. TCP requires examination of sequence numbers and acknowledgment numbers before header removal, while UDP involves basic validation.<\/li>\n<p><\/p>\n<li>The upper layers (Session, Presentation, Application) may perform additional functions like encryption or data compression before delivering the final payload.<\/li>\n<p><\/ul>\n<p><\/p>\n<p>Through these processes, PDUs facilitate efficient data communication across networks, ensuring that information is transmitted accurately and securely.<\/p>\n<p><\/p>\n<h2>Types of Protocol Data Units<\/h2>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/statics.mylandingpages.co\/static\/aaanxdmf26c522mpaaaaz2wwe7ppkact\/image\/11bed9cbd7b843ceb26d9937b824bee1.webp\" alt=\"Types of Protocol Data Units\"><\/p>\n<p><\/p>\n<h3>Application Layer PDUs<\/h3>\n<p><\/p>\n<p><a href=\"https:\/\/wraycastle.com\/blogs\/knowledge-base\/protocol-data-unit\" target=\"_blank\" rel=\"noopener\">Application Layer PDUs<\/a>, often referred to as messages, play a crucial role in the exchange of information between software applications. These PDUs encapsulate data generated or requested by applications, facilitating tasks such as file transfers and web browsing. Each protocol, such as HTTP or FTP, has specific formats for structuring these PDUs. This structure ensures that data remains comprehensible to the receiving application, which is vital for effective communication across different systems.<\/p>\n<p><\/p>\n<p>For example, when a user requests a webpage, the browser generates an HTTP message that includes the requested URL. This message travels through the network, reaching the web server, which processes the request and sends back the appropriate response. The clarity and structure of Application Layer PDUs are essential for seamless interactions between diverse applications.<\/p>\n<p><\/p>\n<h3>Transport Layer PDUs<\/h3>\n<p><\/p>\n<p>Transport Layer PDUs differ significantly in structure and functionality, particularly between TCP and UDP. <a href=\"https:\/\/niusheng.gg13.globaldeepsea.site\/pt\/transport-layer-protocol-data-unit-tcp-udp-pdu\/\" target=\"_blank\" rel=\"noopener\">The following table summarizes<\/a> the key differences between these two protocols:<\/p>\n<p><\/p>\n<table><\/p>\n<thead><\/p>\n<tr><\/p>\n<th>\u7279\u5fb4<\/th>\n<p><\/p>\n<th>TCP Segment<\/th>\n<p><\/p>\n<th>UDP Datagram<\/th>\n<p><\/tr>\n<p><\/thead>\n<p><\/p>\n<tbody><\/p>\n<tr><\/p>\n<td>\u4fe1\u983c\u6027<\/td>\n<p><\/p>\n<td>Guarantees data integrity<\/td>\n<p><\/p>\n<td>No guarantees, potential data loss<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>Order<\/td>\n<p><\/p>\n<td>Ensures data is received in order<\/td>\n<p><\/p>\n<td>No order guarantee<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>Error Checking<\/td>\n<p><\/p>\n<td>Robust error checking with checksums<\/td>\n<p><\/p>\n<td>Minimal error checking<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>Connection Orientation<\/td>\n<p><\/p>\n<td>Connection-oriented<\/td>\n<p><\/p>\n<td>Connectionless<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/td>\n<p><\/p>\n<td>Higher due to error recovery<\/td>\n<p><\/p>\n<td>Lower due to lack of reliability checks<\/td>\n<p><\/tr>\n<p><\/tbody>\n<p><\/table>\n<p><\/p>\n<p>TCP segments ensure reliable communication by establishing a connection and maintaining the order of packets. In contrast, UDP datagrams prioritize speed and efficiency, sacrificing reliability for lower overhead. This distinction makes TCP suitable for applications requiring data integrity, such as file transfers, while UDP serves well for real-time applications like video streaming.<\/p>\n<p><\/p>\n<h3>Network Layer PDUs<\/h3>\n<p><\/p>\n<p>Network Layer PDUs, primarily represented by IP packets, are responsible for routing data across networks. The size of these PDUs can vary based on the protocol version in use. <a href=\"https:\/\/niusheng.gg13.globaldeepsea.site\/protocol-data-unit-journey-across-osi-layers\/\" target=\"_blank\" rel=\"noopener\">The following table outlines<\/a> the typical size range for Network Layer PDUs in both IPv4 and IPv6:<\/p>\n<p><\/p>\n<table><\/p>\n<thead><\/p>\n<tr><\/p>\n<th>Protocol<\/th>\n<p><\/p>\n<th>Minimum Size (bytes)<\/th>\n<p><\/p>\n<th>Maximum Size (bytes)<\/th>\n<p><\/tr>\n<p><\/thead>\n<p><\/p>\n<tbody><\/p>\n<tr><\/p>\n<td>IPv4<\/td>\n<p><\/p>\n<td>46<\/td>\n<p><\/p>\n<td>1500<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>IPv6<\/td>\n<p><\/p>\n<td>46<\/td>\n<p><\/p>\n<td>1500<\/td>\n<p><\/tr>\n<p><\/tbody>\n<p><\/table>\n<p><\/p>\n<p>IPv4 \u30d1\u30b1\u30c3\u30c8\u3068 IPv6 \u30d1\u30b1\u30c3\u30c8\u306e\u6700\u5c0f\u30b5\u30a4\u30ba\u306f\u3044\u305a\u308c\u3082 46 \u30d0\u30a4\u30c8\u3067\u3042\u308a\u3001\u52b9\u679c\u7684\u306a\u9001\u4fe1\u306b\u5341\u5206\u306a\u30c7\u30fc\u30bf\u3092\u78ba\u5b9f\u306b\u4f1d\u9001\u3067\u304d\u307e\u3059\u3002\u6700\u5927\u30b5\u30a4\u30ba 1500 \u30d0\u30a4\u30c8\u306b\u3088\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u8ca0\u8377\u3092\u304b\u3051\u308b\u3053\u3068\u306a\u304f\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u8ee2\u9001\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64 PDU \u306e\u7279\u6027\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u6700\u9069\u5316\u3057\u3001\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u914d\u4fe1\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n<p><\/p>\n<h3>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64 PDU<\/h3>\n<p><\/p>\n<p>\u4e00\u822c\u306b\u30d5\u30ec\u30fc\u30e0\u3068\u547c\u3070\u308c\u308b\u30c7\u30fc\u30bf \u30ea\u30f3\u30af\u5c64 PDU \u306f\u3001\u540c\u3058\u30ed\u30fc\u30ab\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u30c7\u30d0\u30a4\u30b9\u9593\u306e\u901a\u4fe1\u3092\u4fc3\u9032\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u5404\u30d5\u30ec\u30fc\u30e0\u306f\u30d8\u30c3\u30c0\u30fc\u3068\u30c8\u30ec\u30fc\u30e9\u30fc\u3067\u69cb\u6210\u3055\u308c\u3001\u3053\u308c\u3089\u304c\u4e00\u7dd2\u306b\u306a\u3063\u3066\u30c7\u30fc\u30bf\u9001\u4fe1\u306b\u4e0d\u53ef\u6b20\u306a\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u901a\u5e38\u3001\u30d8\u30c3\u30c0\u30fc\u306b\u306f\u9001\u4fe1\u5143\u3068\u5b9b\u5148\u306e MAC \u30a2\u30c9\u30ec\u30b9\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u30c7\u30fc\u30bf\u306e\u6b63\u78ba\u306a\u30ed\u30fc\u30ab\u30eb\u914d\u4fe1\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><\/p>\n<p>\u30c8\u30ec\u30fc\u30e9\u30fc\u306b\u306f\u3001\u30a8\u30e9\u30fc\u691c\u51fa\u30e1\u30ab\u30cb\u30ba\u30e0\u3068\u3057\u3066\u6a5f\u80fd\u3059\u308b\u5de1\u56de\u5197\u9577\u691c\u67fb (CRC) \u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u53d7\u4fe1\u30c7\u30d0\u30a4\u30b9\u306f\u7834\u640d\u3057\u305f\u30d5\u30ec\u30fc\u30e0\u3092\u8b58\u5225\u3057\u3066\u7834\u68c4\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u5b58\u5728\u306b\u3088\u308a\u3001\u30ed\u30fc\u30ab\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30c7\u30fc\u30bf\u9001\u4fe1\u306e\u4fe1\u983c\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64 PDU \u306e\u4e3b\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002:<\/p>\n<p><\/p>\n<ul><\/p>\n<li><strong>\u30d8\u30c3\u30c0<\/strong>: \u9001\u4fe1\u5143\u3068\u5b9b\u5148\u306e MAC \u30a2\u30c9\u30ec\u30b9\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li><strong>\u30da\u30a4\u30ed\u30fc\u30c9<\/strong>: \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u304b\u3089\u30ab\u30d7\u30bb\u30eb\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u4f1d\u9001\u3057\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li><strong>\u30c8\u30ec\u30fc\u30e9\u30fc<\/strong>: \u30a8\u30e9\u30fc\u691c\u51fa\u7528\u306e CRC \u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<p><\/ul>\n<p><\/p>\n<p>\u3053\u308c\u3089\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf \u30ea\u30f3\u30af\u5c64 PDU \u306f\u3001\u30c7\u30fc\u30bf\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u6b63\u78ba\u304b\u3064\u52b9\u7387\u7684\u306b\u9001\u4fe1\u3055\u308c\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>\u7269\u7406\u5c64 PDU<\/h3>\n<p><\/p>\n<p>\u7269\u7406\u5c64 PDU \u306f OSI \u30e2\u30c7\u30eb\u306e\u6700\u4e0b\u4f4d\u5c64\u3092\u8868\u3057\u3001\u30c7\u30fc\u30bf \u30ea\u30f3\u30af\u5c64\u304b\u3089\u306e\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u7528\u306e\u30d3\u30c3\u30c8\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u3053\u306e\u5909\u63db\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u7a2e\u985e\u306e\u30e1\u30c7\u30a3\u30a2\u3067\u306e\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u4fc3\u9032\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u4f7f\u7528\u3055\u308c\u308b\u5a92\u4f53\u306b\u5fdc\u3058\u3066\u3001\u3053\u308c\u3089\u306e\u30d3\u30c3\u30c8\u306f\u3055\u307e\u3056\u307e\u306a\u5f62\u5f0f\u3067\u8868\u73fe\u3067\u304d\u307e\u3059\u3002:<\/p>\n<p><\/p>\n<ul><\/p>\n<li><strong>\u96fb\u6c17\u4fe1\u53f7<\/strong>: \u9285\u30b1\u30fc\u30d6\u30eb\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li><strong>\u5149\u4fe1\u53f7<\/strong>: \u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u30b1\u30fc\u30d6\u30eb\u306b\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li><strong>\u96fb\u6ce2<\/strong>: \u7121\u7dda\u901a\u4fe1\u306b\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<p><\/ul>\n<p><\/p>\n<p>\u7269\u7406\u5c64\u306f\u3001\u30e1\u30c7\u30a3\u30a2\u306b\u95a2\u4fc2\u306a\u304f\u3001\u3042\u308b\u30c7\u30d0\u30a4\u30b9\u304b\u3089\u5225\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u30c7\u30fc\u30bf\u304c\u52b9\u7387\u7684\u306b\u8ee2\u9001\u3055\u308c\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002\u3053\u306e\u9069\u5fdc\u6027\u306f\u3001\u591a\u69d8\u306a\u901a\u4fe1\u65b9\u6cd5\u304c\u5171\u5b58\u3059\u308b\u73fe\u4ee3\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306b\u3068\u3063\u3066\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u7269\u7406\u5c64 PDU \u306f\u3001\u30c7\u30fc\u30bf\u3092\u9069\u5207\u306a\u5f62\u5f0f\u306b\u5909\u63db\u3059\u308b\u3053\u3068\u3067\u3001\u3055\u307e\u3056\u307e\u306a\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3084\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u9593\u3067\u306e\u30b7\u30fc\u30e0\u30ec\u30b9\u306a\u63a5\u7d9a\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<p>\u30c7\u30fc\u30bf\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4ecb\u3057\u3066\u3069\u306e\u3088\u3046\u306b\u79fb\u52d5\u3059\u308b\u304b\u3092\u628a\u63e1\u3059\u308b\u306b\u306f\u3001\u30c7\u30fc\u30bf \u30ea\u30f3\u30af\u5c64\u3068\u7269\u7406\u5c64\u306e PDU \u306e\u4e21\u65b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u5c64\u306f\u9023\u643a\u3057\u3066\u60c5\u5831\u304c\u6b63\u78ba\u304b\u3064\u52b9\u7387\u7684\u306b\u9001\u4fe1\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u901a\u4fe1\u306e\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u3092\u5f62\u6210\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h2>\u30d7\u30ed\u30c8\u30b3\u30eb\u9593\u306e PDU \u306e\u6bd4\u8f03<\/h2>\n<p><\/p>\n<h3>TCP PDU \u3068 UDP PDU<\/h3>\n<p><\/p>\n<p>TCP (\u4f1d\u9001\u5236\u5fa1\u30d7\u30ed\u30c8\u30b3\u30eb) \u3068 UDP (\u30e6\u30fc\u30b6\u30fc \u30c7\u30fc\u30bf\u30b0\u30e9\u30e0 \u30d7\u30ed\u30c8\u30b3\u30eb) \u306f\u3001\u30c7\u30fc\u30bf\u4f1d\u9001\u306b\u304a\u3044\u3066\u7570\u306a\u308b\u76ee\u7684\u3092\u679c\u305f\u3057\u307e\u3059\u3002 <a href=\"https:\/\/www.linkedin.com\/posts\/babatunde-olanipekun_networking-cybersecurity-tcp-activity-7396646248302252032-fKid\" target=\"_blank\" rel=\"noopener\">\u6b21\u306e\u8868\u306f\u3001\u305d\u308c\u3089\u306e\u4e3b\u306a\u9055\u3044\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/a>:<\/p>\n<p><\/p>\n<table><\/p>\n<thead><\/p>\n<tr><\/p>\n<th>Protocol<\/th>\n<p><\/p>\n<th>\u4fe1\u983c\u6027<\/th>\n<p><\/p>\n<th>\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/th>\n<p><\/p>\n<th>\u4f7f\u7528\u4f8b<\/th>\n<p><\/tr>\n<p><\/thead>\n<p><\/p>\n<tbody><\/p>\n<tr><\/p>\n<td>TCP<\/td>\n<p><\/p>\n<td>\u9ad8\u3044<\/td>\n<p><\/p>\n<td>\u9ad8\u3044<\/td>\n<p><\/p>\n<td>Web \u30d6\u30e9\u30a6\u30b8\u30f3\u30b0\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u3001\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001<\/td>\n<p><\/tr>\n<p><\/p>\n<tr><\/p>\n<td>UDP<\/td>\n<p><\/p>\n<td>\u4f4e\u3044<\/td>\n<p><\/p>\n<td>\u4f4e\u3044<\/td>\n<p><\/p>\n<td>\u30d3\u30c7\u30aa\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u3001VoIP\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u30b2\u30fc\u30e0\u3001DNS<\/td>\n<p><\/tr>\n<p><\/tbody>\n<p><\/table>\n<p><\/p>\n<ul><\/p>\n<li>\n<p><strong>TCP<\/strong>:<\/p>\n<p><\/p>\n<ul><\/p>\n<li>Connection-oriented<\/li>\n<p><\/p>\n<li>\u30c7\u30fc\u30bf\u914d\u4fe1\u3068\u6b63\u3057\u3044\u9806\u5e8f\u3092\u4fdd\u8a3c\u3057\u307e\u3059<\/li>\n<p><\/p>\n<li>\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\u3068\u518d\u9001\u4fe1\u3092\u5b9f\u884c\u3057\u307e\u3059<\/li>\n<p><\/p>\n<li>\u9045\u3044\u304c\u4fe1\u983c\u6027\u304c\u9ad8\u3044<\/li>\n<p><\/ul>\n<p><\/li>\n<p><\/p>\n<li>\n<p><strong>UDP<\/strong>:<\/p>\n<p><\/p>\n<ul><\/p>\n<li>Connectionless<\/li>\n<p><\/p>\n<li>\u914d\u9001\u307e\u305f\u306f\u6ce8\u6587\u306e\u4fdd\u8a3c\u306f\u3042\u308a\u307e\u305b\u3093<\/li>\n<p><\/p>\n<li>\u6700\u5c0f\u9650\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3068\u4f4e\u9045\u5ef6<\/li>\n<p><\/p>\n<li>\u9ad8\u901f\u3060\u304c\u4fe1\u983c\u6027\u304c\u4f4e\u3044<\/li>\n<p><\/ul>\n<p><\/li>\n<p><\/ul>\n<p><\/p>\n<p>TCP \u306f\u4fe1\u983c\u6027\u304c\u9ad8\u3044\u305f\u3081\u3001\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u306a\u3069\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u304c\u5fc5\u8981\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u5bfe\u7167\u7684\u306b\u3001UDP \u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306e\u4f4e\u3055\u306f\u3001\u901f\u5ea6\u304c\u91cd\u8981\u306a\u30d3\u30c7\u30aa \u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u306a\u3069\u306e\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0 \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u30e1\u30ea\u30c3\u30c8\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>IP PDU<\/h3>\n<p><\/p>\n<p>IP PDU \u306f\u4e3b\u306b IP \u30d1\u30b1\u30c3\u30c8\u3067\u8868\u3055\u308c\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306e\u30c7\u30fc\u30bf \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u7ba1\u7406\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u9001\u4fe1\u306b\u4e0d\u53ef\u6b20\u306a\u65ad\u7247\u5316\u3068\u518d\u69cb\u6210\u3092\u51e6\u7406\u3057\u307e\u3059\u3002 <a href=\"https:\/\/en.wikipedia.org\/wiki\/IP_fragmentation\" target=\"_blank\" rel=\"noopener\">\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u304c\u6700\u5927\u4f1d\u9001\u5358\u4f4d (MTU) \u30b5\u30a4\u30ba\u3092\u8d85\u3048\u308b\u5834\u5408<\/a>\u3001\u65ad\u7247\u5316\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u30b9\u30c6\u30c3\u30d7\u304c\u542b\u307e\u308c\u307e\u3059:<\/p>\n<p><\/p>\n<ol><\/p>\n<li>\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u304c MTU \u30b5\u30a4\u30ba\u3092\u8d85\u3048\u308b\u3068\u3001\u65ad\u7247\u5316\u304c\u958b\u59cb\u3055\u308c\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li>\u5143\u306e\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u306f\u5c0f\u3055\u306a\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u306b\u5206\u5272\u3055\u308c\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li>\u5404\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u306b\u306f\u3001\u5143\u306e IP \u30d8\u30c3\u30c0\u30fc\u306e\u5909\u66f4\u3055\u308c\u305f\u30b3\u30d4\u30fc\u3068\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u4e00\u90e8\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li>\u8b58\u5225\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3001\u518d\u69cb\u7bc9\u306e\u969b\u306b\u3059\u3079\u3066\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u306b\u308f\u305f\u3063\u3066\u540c\u3058\u307e\u307e\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li>\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8 \u30aa\u30d5\u30bb\u30c3\u30c8 \u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3001\u5404\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u306e\u4f4d\u7f6e\u3092\u793a\u3057\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li><a href=\"https:\/\/jumpcloud.com\/it-index\/what-is-ip-fragmentation\" target=\"_blank\" rel=\"noopener\">\u518d\u30a2\u30bb\u30f3\u30d6\u30ea\u306f\u5b9b\u5148\u30db\u30b9\u30c8\u3067\u884c\u308f\u308c\u307e\u3059<\/a> Identification \u30d5\u30a3\u30fc\u30eb\u30c9\u3068 Fragment Offset \u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<p><\/ol>\n<p><\/p>\n<p>\u518d\u69cb\u7bc9\u306f\u3001\u4e2d\u9593\u30eb\u30fc\u30bf\u30fc\u3067\u306f\u306a\u304f\u3001\u5b9b\u5148\u30db\u30b9\u30c8\u3067\u884c\u308f\u308c\u307e\u3059\u3002\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u304c\u5931\u308f\u308c\u305f\u5834\u5408\u3001\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u5168\u4f53\u304c\u5931\u308f\u308c\u305f\u3068\u307f\u306a\u3055\u308c\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u9001\u4fe1\u306e\u91cd\u8981\u6027\u304c\u5f37\u8abf\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8 PDU<\/h3>\n<p><\/p>\n<p>\u4e00\u822c\u306b\u30d5\u30ec\u30fc\u30e0\u3068\u3057\u3066\u77e5\u3089\u308c\u308b\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8 PDU \u306f\u3001\u30ed\u30fc\u30ab\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u901a\u4fe1\u3092\u5bb9\u6613\u306b\u3057\u307e\u3059\u3002\u5404\u30d5\u30ec\u30fc\u30e0\u306f\u30d8\u30c3\u30c0\u30fc\u3068\u30c8\u30ec\u30fc\u30e9\u30fc\u3067\u69cb\u6210\u3055\u308c\u3001\u30c7\u30fc\u30bf\u9001\u4fe1\u306b\u5fc5\u8981\u306a\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u30d8\u30c3\u30c0\u30fc\u306b\u306f\u9001\u4fe1\u5143\u3068\u5b9b\u5148\u306e MAC \u30a2\u30c9\u30ec\u30b9\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u6b63\u78ba\u306a\u914d\u4fe1\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002\u30c8\u30ec\u30fc\u30e9\u30fc\u306b\u306f\u3001\u30a8\u30e9\u30fc\u691c\u51fa\u306e\u305f\u3081\u306e\u5de1\u56de\u5197\u9577\u691c\u67fb (CRC) \u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><\/p>\n<p>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8 \u30d5\u30ec\u30fc\u30e0\u306f\u3001\u30ed\u30fc\u30ab\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u3089\u306b\u3088\u308a\u3001\u30c7\u30d0\u30a4\u30b9\u304c\u52b9\u679c\u7684\u306b\u901a\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u30b7\u30fc\u30e0\u30ec\u30b9\u306a\u30c7\u30fc\u30bf\u4ea4\u63db\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002 <a href=\"https:\/\/www.newsunnpdu.com\/news\/understanding-the-different-roles-of-pdu-and-ups-for-reliable-power\/\" target=\"_blank\" rel=\"noopener\">\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8 PDU \u306b\u3064\u3044\u3066<\/a> \u30ed\u30fc\u30ab\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n<p><\/p>\n<h2>PDU \u306e\u5b9f\u4e16\u754c\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/h2>\n<p><\/p>\n<h3>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c7\u30d0\u30a4\u30b9<\/h3>\n<p><\/p>\n<p>\u30eb\u30fc\u30bf\u30fc\u3084\u30b9\u30a4\u30c3\u30c1\u306a\u3069\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30c7\u30d0\u30a4\u30b9\u306f\u3001 <a href=\"https:\/\/www.auvik.com\/franklyit\/blog\/network-devices\/\" target=\"_blank\" rel=\"noopener\">\u30d7\u30ed\u30c8\u30b3\u30eb \u30c7\u30fc\u30bf \u30e6\u30cb\u30c3\u30c8 (PDU) \u306e\u51e6\u7406<\/a>\u3002\u3053\u308c\u3089\u306e\u30c7\u30d0\u30a4\u30b9\u306f OSI \u30e2\u30c7\u30eb\u306e\u7279\u5b9a\u306e\u5c64\u3067\u52d5\u4f5c\u3057\u3001\u305d\u308c\u305e\u308c\u304c\u7570\u306a\u308b\u6a5f\u80fd\u3092\u6301\u3061\u307e\u3059\u3002\u30c7\u30fc\u30bf\u304c\u3053\u308c\u3089\u306e\u5c64\u3092\u901a\u904e\u3059\u308b\u969b\u306b\u3001PDU \u306f\u5909\u63db\u3092\u53d7\u3051\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30c7\u30fc\u30bf\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u304b\u3089\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306b\u79fb\u52d5\u3059\u308b\u3068\u3001IP \u30d8\u30c3\u30c0\u30fc\u304c\u524a\u9664\u3055\u308c\u3001PDU \u304c\u30d1\u30b1\u30c3\u30c8\u304b\u3089\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><\/p>\n<ul><\/p>\n<li><strong>\u30b9\u30a4\u30c3\u30c1<\/strong>: \u3053\u308c\u3089\u306e\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u30ed\u30fc\u30ab\u30eb \u30a8\u30ea\u30a2 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af (LAN) \u5185\u306e\u8907\u6570\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u63a5\u7d9a\u3057\u307e\u3059\u3002\u5f7c\u3089\u306f MAC \u30a2\u30c9\u30ec\u30b9\u3092\u5b66\u7fd2\u3057\u3066\u3001\u76ee\u7684\u306e\u53d7\u4fe1\u8005\u306b\u306e\u307f\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u308a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u5f37\u5316\u3055\u308c\u3001\u30c7\u30fc\u30bf\u306e\u885d\u7a81\u304c\u8efd\u6e1b\u3055\u308c\u307e\u3059\u3002<\/li>\n<p><\/p>\n<li><strong>\u30eb\u30fc\u30bf\u30fc<\/strong>: \u30eb\u30fc\u30bf\u30fc\u306f\u3001\u5bb6\u5ead\u5185 LAN \u306a\u3069\u306e\u3055\u307e\u3056\u307e\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3057\u307e\u3059\u3002 IP \u30a2\u30c9\u30ec\u30b9\u3092\u5229\u7528\u3057\u3066\u6700\u3082\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf \u30d1\u30b9\u3092\u6c7a\u5b9a\u3057\u3001\u6700\u9069\u306a\u30c7\u30fc\u30bf\u9001\u4fe1\u306e\u305f\u3081\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 \u30c6\u30fc\u30d6\u30eb\u3092\u7dad\u6301\u3057\u307e\u3059\u3002<\/li>\n<p><\/ul>\n<p><\/p>\n<h3>\u30c7\u30fc\u30bf\u9001\u4fe1\u306e\u30b7\u30ca\u30ea\u30aa<\/h3>\n<p><\/p>\n<p>PDU \u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u4f1d\u9001\u30b7\u30ca\u30ea\u30aa\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30d7\u30ed\u30c8\u30b3\u30eb\u9593\u3067\u306e\u901a\u4fe1\u3092\u5bb9\u6613\u306b\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30d3\u30c7\u30aa\u3092\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u3059\u308b\u3068\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u30d3\u30c7\u30aa \u30c7\u30fc\u30bf\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3059\u308b PDU \u3092\u751f\u6210\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e PDU \u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4ecb\u3057\u3066\u79fb\u52d5\u3057\u3001\u30c7\u30fc\u30bf\u304c\u30e6\u30fc\u30b6\u30fc\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u30bf\u30a4\u30e0\u30ea\u30fc\u306b\u5230\u9054\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u3001PDU \u306f\u30c7\u30fc\u30bf \u30d1\u30b1\u30c3\u30c8\u304c\u5b8c\u5168\u306a\u72b6\u614b\u3067\u5230\u7740\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002 TCP \u306a\u3069\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306f PDU \u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u3059\u3079\u3066\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u304c\u6b63\u3057\u3044\u9806\u5e8f\u3067\u53d7\u4fe1\u3055\u308c\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002\u3044\u305a\u308c\u304b\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u304c\u5931\u308f\u308c\u305f\u5834\u5408\u3001TCP \u306f\u518d\u9001\u4fe1\u3092\u8981\u6c42\u3057\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u7dad\u6301\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff<\/h3>\n<p><\/p>\n<p>PDU \u306e\u8a2d\u8a08\u3068\u69cb\u9020\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u52b9\u7387\u7684\u306a\u30b5\u30a4\u30ba\u306e PDU \u306b\u3088\u308a\u3001\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u304c\u5411\u4e0a\u3057\u3001\u5f85\u3061\u6642\u9593\u304c\u77ed\u7e2e\u3055\u308c\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001PDU \u304c\u5927\u304d\u3044\u3068\u9001\u4fe1\u6642\u9593\u304c\u9577\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u304c\u3001PDU \u304c\u5c0f\u3055\u3044\u3068\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u6700\u5c0f\u9650\u306b\u6291\u3048\u3089\u308c\u308b\u305f\u3081\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<p>\u3055\u3089\u306b\u3001\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u9078\u629e\u306f PDU \u306e\u51e6\u7406\u65b9\u6cd5\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002 TCP \u306e\u4fe1\u983c\u6027\u30e1\u30ab\u30cb\u30ba\u30e0\u306b\u3088\u308a\u8ffd\u52a0\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u767a\u751f\u3057\u3001\u30c7\u30fc\u30bf\u9001\u4fe1\u304c\u9045\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5bfe\u7167\u7684\u306b\u3001UDP \u306f\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u6700\u5c0f\u9650\u306b\u6291\u3048\u3089\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u3088\u308a\u9ad8\u901f\u306a\u30c7\u30fc\u30bf\u8ee2\u9001\u304c\u53ef\u80fd\u3067\u3042\u308a\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0 \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30c0\u30a4\u30ca\u30df\u30af\u30b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3057\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u901a\u4fe1\u3092\u78ba\u4fdd\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p><\/p>\n<hr>\n<p><\/p>\n<p>\u30d7\u30ed\u30c8\u30b3\u30eb \u30c7\u30fc\u30bf \u30e6\u30cb\u30c3\u30c8 (PDU) \u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306b\u304a\u3051\u308b\u52b9\u679c\u7684\u306a\u30c7\u30fc\u30bf\u9001\u4fe1\u306b\u4e0d\u53ef\u6b20\u306a\u69cb\u6210\u8981\u7d20\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u3001\u3055\u307e\u3056\u307e\u306a\u30d7\u30ed\u30c8\u30b3\u30eb\u9593\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u901a\u4fe1\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002 PDU \u306e\u4e3b\u8981\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u306f\u30d8\u30c3\u30c0\u30fc\u3001\u30da\u30a4\u30ed\u30fc\u30c9\u3001\u30c8\u30ec\u30fc\u30e9\u30fc\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u305d\u308c\u305e\u308c\u304c <a href=\"https:\/\/nbyosun.com\/understanding-network-pdu-in-networking\/\" target=\"_blank\" rel=\"noopener\">\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027<\/a> \u305d\u3057\u3066\u30a8\u30e9\u30fc\u691c\u51fa\u3002<\/p>\n<p><\/p>\n<p>PDU \u3092\u7406\u89e3\u3059\u308b\u3068\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u6b21\u306e\u3088\u3046\u306a\u3044\u304f\u3064\u304b\u306e\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002 <a href=\"https:\/\/www.internold.com\/lesson\/fundamentals-of-tcp-ip-networking-detailed\/\" target=\"_blank\" rel=\"noopener\">\u8907\u96d1\u306a\u6982\u5ff5\u3092\u5358\u7d14\u5316\u3059\u308b<\/a> \u30de\u30eb\u30c1\u30d9\u30f3\u30c0\u30fc\u306e\u76f8\u4e92\u904b\u7528\u6027\u306e\u4fc3\u9032\u3002\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u304c\u9032\u5316\u3059\u308b\u306b\u3064\u308c\u3066\u3001PDU \u3082\u9069\u5fdc\u3057\u7d9a\u3051\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u4fe1\u983c\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf \u30d5\u30ed\u30fc\u306e\u6a19\u6e96\u5316\u306b\u304a\u3051\u308b\u305d\u308c\u3089\u306e\u5f79\u5272\u306f\u3001\u73fe\u4ee3\u306e\u901a\u4fe1\u30b7\u30b9\u30c6\u30e0\u306b\u3068\u3063\u3066\u4f9d\u7136\u3068\u3057\u3066\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p><\/p>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<p><\/p>\n<h3>\u30d7\u30ed\u30c8\u30b3\u30eb \u30c7\u30fc\u30bf \u30e6\u30cb\u30c3\u30c8 (PDU) \u3068\u306f\u4f55\u3067\u3059\u304b?<\/h3>\n<p><\/p>\n<p>\u30d7\u30ed\u30c8\u30b3\u30eb \u30c7\u30fc\u30bf \u30e6\u30cb\u30c3\u30c8 (PDU) \u306f\u3001\u7279\u5b9a\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u7528\u3057\u3066\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u9593\u3067\u4ea4\u63db\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306e\u57fa\u672c\u5358\u4f4d\u3067\u3059\u3002\u52b9\u679c\u7684\u306a\u901a\u4fe1\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001\u30c7\u30fc\u30bf\u3092\u30d8\u30c3\u30c0\u30fc\u3068\u30c8\u30ec\u30fc\u30e9\u30fc\u3067\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306b\u304a\u3044\u3066 PDU \u304c\u91cd\u8981\u306a\u306e\u306f\u306a\u305c\u3067\u3059\u304b?<\/h3>\n<p><\/p>\n<p>PDU \u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30c7\u30fc\u30bf\u4f1d\u9001\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u30a8\u30e9\u30fc\u691c\u51fa\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3001\u9069\u5207\u306a\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u5bb9\u6613\u306b\u3057\u3001\u30c7\u30d0\u30a4\u30b9\u9593\u306e\u52b9\u7387\u7684\u306a\u901a\u4fe1\u306b\u4e0d\u53ef\u6b20\u306a\u3082\u306e\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>PDU \u306e\u4e3b\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u4f55\u3067\u3059\u304b?<\/h3>\n<p><\/p>\n<p>PDU \u306f\u3001\u30d7\u30ed\u30c8\u30b3\u30eb \u30d8\u30c3\u30c0\u30fc\u3001\u30da\u30a4\u30ed\u30fc\u30c9\u3001\u30c8\u30ec\u30fc\u30e9\u30fc\u306e 3 \u3064\u306e\u4e3b\u8981\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002\u5404\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u3001\u30c7\u30fc\u30bf\u9001\u4fe1\u3068\u6574\u5408\u6027\u306b\u304a\u3044\u3066\u7279\u5b9a\u306e\u76ee\u7684\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>PDU \u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u9593\u3067\u3069\u306e\u3088\u3046\u306b\u7570\u306a\u308a\u307e\u3059\u304b?<\/h3>\n<p><\/p>\n<p>PDU \u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64 PDU \u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64 PDU \u306f\u30bb\u30b0\u30e1\u30f3\u30c8\u307e\u305f\u306f\u30c7\u30fc\u30bf\u30b0\u30e9\u30e0\u3001\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64 PDU \u306f\u30d5\u30ec\u30fc\u30e0\u3067\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u30bf\u30a4\u30d7\u306b\u306f\u72ec\u81ea\u306e\u69cb\u9020\u3068\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>PDU \u306b\u304a\u3051\u308b\u30c8\u30ec\u30fc\u30e9\u30fc\u306e\u5f79\u5272\u306f\u4f55\u3067\u3059\u304b?<\/h3>\n<p><\/p>\n<p>\u30c8\u30ec\u30fc\u30e9\u30fc\u3001\u307e\u305f\u306f\u30d5\u30c3\u30bf\u30fc\u306f\u3001PDU \u306e\u6700\u5f8c\u306b\u8868\u793a\u3055\u308c\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3059\u3002\u901a\u5e38\u3001\u9001\u4fe1\u4e2d\u306e\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30b5\u30e0\u306a\u3069\u306e\u30a8\u30e9\u30fc\u691c\u51fa\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>PDU \u3067\u306f\u30ab\u30d7\u30bb\u30eb\u5316\u306f\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3057\u307e\u3059\u304b?<\/h3>\n<p><\/p>\n<p>\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u306f\u3001OSI \u30e2\u30c7\u30eb\u306e\u5404\u5c64\u3067\u30d7\u30ed\u30c8\u30b3\u30eb\u56fa\u6709\u306e\u30d8\u30c3\u30c0\u30fc\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u30e9\u30c3\u30d7\u3059\u308b\u3053\u3068\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u308a\u3001\u9001\u4fe1\u7528\u306b\u30c7\u30fc\u30bf\u304c\u6574\u7406\u3055\u308c\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u3067\u306e\u6574\u5408\u6027\u304c\u5f37\u5316\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><\/p>\n<h3>TCP PDU \u3068 UDP PDU \u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b?<\/h3>\n<p><\/p>\n<p>TCP PDU \u306f\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u9806\u5e8f\u4ed8\u3051\u3089\u308c\u305f\u30c7\u30fc\u30bf\u914d\u4fe1\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u304c\u3001UDP PDU \u306f\u4fdd\u8a3c\u306a\u3057\u3067\u901f\u5ea6\u3068\u52b9\u7387\u3092\u512a\u5148\u3057\u307e\u3059\u3002 TCP \u306f\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u304c\u5fc5\u8981\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u9069\u3057\u3066\u304a\u308a\u3001UDP \u306f\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0 \u30b7\u30ca\u30ea\u30aa\u306b\u6700\u9069\u3067\u3059\u3002<\/p>\n<p><\/p>\n<h3>PDU \u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u304b?<\/h3>\n<p><\/p>\n<p>\u306f\u3044\u3001PDU \u306e\u8a2d\u8a08\u3068\u30b5\u30a4\u30ba\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u304f\u5f71\u97ff\u3057\u307e\u3059\u3002\u52b9\u7387\u7684\u306a\u30b5\u30a4\u30ba\u306e PDU \u306f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3092\u5411\u4e0a\u3055\u305b\u3001\u5f85\u3061\u6642\u9593\u3092\u77ed\u7e2e\u3057\u307e\u3059\u304c\u3001PDU \u304c\u5927\u304d\u3044\u3068\u9001\u4fe1\u6642\u9593\u304c\u9577\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>\u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u4ea4\u63db\u306e\u305f\u3081\u306e\u5f79\u5272\u3068\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u542b\u3081\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306b\u304a\u3051\u308b\u30d7\u30ed\u30c8\u30b3\u30eb \u30c7\u30fc\u30bf \u30e6\u30cb\u30c3\u30c8 (PDU) \u306e\u5b9a\u7fa9\u3068\u7a2e\u985e\u3092\u7406\u89e3\u3057\u307e\u3059\u3002<\/p>","protected":false},"author":1,"featured_media":4608,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-4609","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/posts\/4609","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/comments?post=4609"}],"version-history":[{"count":0,"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/posts\/4609\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/media\/4608"}],"wp:attachment":[{"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/media?parent=4609"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/categories?post=4609"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsunn.com\/ja\/wp-json\/wp\/v2\/tags?post=4609"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}