ICMPv4和ICMPv6都是Internet Control Message Protocol的不同版本，分别用于IPv4和IPv6网络。以下是关于两者的详细解答：ICMPv4： 定义：ICMPv4是ICMP在IPv4网络中的实现。 功能：提供诊断和控制信息，解决IP协议在缺乏终端系统对未达目的地包命运的了解以及缺乏获取诊断信息功能的问题。 消息类型：分为错误和...
未知的 ICMPv6 错误消息必须被递交到产生导致该错误的 datagram 的上层进程 (如果可能)。 未知的 ICMPv6 信息消息被丢弃。 ICMPv6 错误消息包括尽可能多造成该错误的原始 IPv6 datagram,只要错误信息的 datagram 不超过最小的 IPv6 MTU (1280 字节)。 当处理 ICMPv6 错误消息时,上层协议类型从original的 packet (...
ICMP分为错误和信息两类消息，IPv4中常见的有Echo Request/Reply、Router Advertisement/Solicitation等。ICMPv6扩展了其功能，不仅负责错误和信息，还涉及IPv6路由和主机配置。ICMP错误消息的生成有特定限制，以防止广播风暴。在处理ICMP消息时，操作系统通常自动处理信息消息，错误消息传递给用户进程或传输协议。...
*/ // 类型校验,如果类型超过最大值,则报错 if (icmph->type > NR_ICMP_TYPES) goto error; /* * Parse the ICMP message */ // 对广播和多播的处理 // 只处理 ICMP_ECHO、ICMP_TIMESTAMP、ICMP_ADDRESS、ICMP_ADDRESSREPLY类型的多播数据包 // 如果开启了忽略echo广播包,那么也丢弃ICMP_ECHO、ICMP_...
对比学习ICMPv6:注意ICMPv4与ICMPv6的区别,避免混淆 实验验证:通过Wireshark等抓包工具实际观察ICMP报文交互过程,加深理解 历年真题练习:重点练习2015-2023年真题中涉及ICMP的题目,总结常见考查方式 故障排查场景:思考ICMP在网络故障诊断中的应用,如如何利用ICMP判断网络不通的原因 ...
in IPv4, IPv6, ICMPv4, ICMPv6, UDP, and TCP Headers Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Sta...
Internet Control Message Protocol (ICMP/ICMPv4 and ICMPv6) The Internet Protocol (IP) is the key network layer protocol that implements the TCP/IP protocol suite. Since IP is the protocol that provides the mechanism for delivering datagrams between devices, it is designed to be relatively ...
9TCP/IP Lower-Layer (Interface, Internet and Transport) Protocols (OSI Layers 2, 3 and 4) 9TCP/IP Internet Layer (OSI Network Layer) Protocols 9Internet Control Message Protocol (ICMP/ICMPv4 and ICMPv6) 9ICMP Message Types and Formats ...
experimental values in this document.5. Fields in the IPv6 ICMP Header[RFC4443] includes experimental ICMPv6 type values for Informational (200, 201) and Error (100, 101) message types. ICMPv6 code values are allocated per type, so it's not feasible to assign experimental ...
9Internet Control Message Protocol (ICMP/ICMPv4 and ICMPv6) 9ICMP Message Types and Formats 9ICMP Version 4 (ICMPv4) Error Message Types and Formats The previous topics in this section describe four specific ICMPv4 message types that allow a device to report various error conditions to the orig...