代码(Code)字段:0 ICMP Echo Request报文通常用于测试网络连接是否正常,例如使用Ping命令时,源主机会向目标主机发送一个ICMP Echo Request报文,如果目标主机可达且能够处理该报文,则会回复一个ICMP Echo Reply报文。 2. ICMP Echo Reply(回显应答)报文 类型(Type)字段:0 代码(Code)字段:0 ICMP Echo Reply报文是IC...
ICMP Echo Request/Reply消息格式 用于检测IP网络连通性的Ping/Tracert,是通过发送ICMP Echo消息实现的。 报文格式 +0---7---15---31 | Type | Code | Checksum | +---+ | Identifier | Sequence Number| +---+ | Data | +---+ 字段 长度 含义 Type 1字节 消息类型: 0:回显应答报文 8:请求回显...
回声请求(echo request)和回声应答(echo reply)两个互联网控制ICMP消息的主要功能是什么?A.报告错误B.检查节点( node)之间的通达性C.检
并等待目标主机返回ICMP echo回复消息。如果的网卡上的ICMP正常，但是ping命令无法收到回显，可能是因为：...
百度试题 结果1 题目若使用Ping命令向目标主机发送ICMP回应请求(ICMP echo request),并且目标主机返回ICMP回应应答(ICMP echo reply),则可判断: 相关知识点: 试题来源: 解析 主机存活网络通畅 反馈 收藏
Sequence Number: This parameter, used in ICMP echo request and reply messages, helps track multiple requests and replies between devices. How Does ICMP Work Without a Port? ICMP is unique in that it operates without a port number. Here’s how ICMP works without a port: Layer 3 Protocol: ...
0: echo reply 8: echo request Code 1 Byte Set to 0. Checksum 2 Byte ICMP checksum uses the same additive check and algorithm as IP. The ICMP Checksum field, however, covers the ICMP packet only. Identifier 2 Byte An identifier to aid in matching Echo Replies/Request to this Echo Requ...
使用ping、tracert等命令调用; 就像打招呼一样; 2.ICMP的格式 ICMP数据是封装在网络层ip包头下面,但并不代表它是传输层协议; ICMP也是网络层协议,和IP协议是两个网络层协议的嵌套关系; ICMP的类型:echo request 回响请求 echo reply 回响应答 Type 类型和 Code 代码的组合:不同的组合表达不同的意思 ...
The ICMP echo-request and echo-reply messages are commonly used for the purpose of performing a ping. Unfortunately network attacks can exploit this process, creating means of disruption such as the ICMP flood attack and the ping of death attack. Whitepaper Developing a strategy for your network...