1.2 TCP Header Format Remember that the combination of TCP header and TCP in one packet is called a TCP segment. Figure 1 depicts the format of all valid TCP segments. The size of the header without options is 20 bytes. We will briefly define each field of the TCP header below. Figure ...
2.1.1 IPv4 datagram frame format: The following diagram shows the IPv4 frame format. The detailed descriptions for the header fields can be found in RFC 791. IPv4 header format The header checksum field is needed to ensure the integrity of the IP header. The sender of the IPv4 packet is r...
3.2 IP Header / IP首部 34 3.3 IP Routing / IP路由选择37 3.4 Subnet Addressing / 子网寻址42 3.5 Subnet Mask / 子网掩码43 3.6 Special Case IP Addresses / 特殊情况的IP地址 45 3.7 A Subnet Example / 子网示例46 3.8 ifconfig Command / ifconfig命令47 3.9 netstat Command / netstat命令 49 3....
12.3 TCP Header and Encapsulation 12.4 Summary 12.5 References Chapter 13 TCP Connection Management 13.1 Introduction 13.2 TCP Connection Establishment and Termination 13.2.1 TCP Half-Close 13.2.2 Simultaneous Open and Close 13.2.3 Initial Sequence Number (ISN) 13.2.4 Example 13.2.5 ...
3.2 IP Header / IP首部 34 3.3 IP Routing / IP路由选择37 3.4 Subnet Addressing / 子网寻址42 3.5 Subnet Mask / 子网掩码43 3.6 Special Case IP Addresses / 特殊情况的IP地址 45 3.7 A Subnet Example / 子网示例46 3.8 ifconfig Command / ifconfig命令47 ...
24.4 TCP Header / TCP首部 801 24.5 TCP Control Block / TCP控制块 803 24.6 TCP State Transition Diagram / TCP状态变迁图 805 24.7 TCP Sequence Numbers / TCP序列号807 24.8 tcp_init Function / tcp_init函数 812 24.9 Summary / 小结 815 Chapter 25. TCP Timers / TCP定时器817 25.1 Introduction...
20-byte TCP header format 💆♀️ The format of the TCP headers attached to the payload follows the below K&R diagram: The header is created in_make_tcp_header_without_checksumin utils, as we cannot compute the checksum without the segment’s payload. ...
IP Header 一个IP 数据包由包头( header )和有效载荷( payload )组成。载荷包含实际发送的数据,包头是元数据( metadata )。 IPv4 Header 一个IPv4的包头通常像这样: IPv4HeaderFormatOffsetsOctet0123OctetBit012345678910111213141516171819202122232425262728293031|00|Version|IHL|DSCP|ECN|TotalLength|432|Identification|Flag...
The IP Header An IP packet consists of a header and a payload. The payload contains the actual data to be transmitted, while the header is metadata. IPv4 Header An IPv4 header looks like this: IPv4 Header Format Offsets Octet0123Octet Bit012345678910111213141516171819202122232425262728293031|00|Version...
10.2 UDP Header 10.3 UDP Checksum 10.4 Examples 10.5 UDP and IPv6 10.5.1 Teredo: Tunneling IPv6 through IPv4 Networks Contents xxiii 10.6 UDP-Lite 10.7 IP Fragmentation 10.7.1 Example: UDP/IPv4 Fragmentation 10.7.2 Reassembly Timeout 10.8 Path MTU Discovery with UDP ...