ICMP (Internet Control Message Protocol) is a network layer protocol that reports errors and provides information related to IP packet processing. ICMP is used by network devices to send error messages indicating, for example, that a requested service is not available or that a …

2024年9月12日 · What is ICMP? ICMP is used for reporting errors and management queries. It is a supporting protocol and is used by network devices like routers for sending error messages and operations information. For example, the requested service is not available or a host or router could not be reached.

ICMP (Internet Control Message Protocol) is a network protocol used for diagnostics and network management. A good example is the “ping” utility which uses an ICMP request and ICMP reply message. When a certain host of port is unreachable, ICMP might send an error message to …

2020年4月1日 · The ICMP messages common to both ICMPv4 and ICMPv6 are: Host reachability, Destination or Service Unreachable, and Time exceeded. An ICMP Echo Message tests the reachability of a host on an IP network. The local host sends an ICMP Echo Request to a host. If the host is available, the destination host responds with an Echo Reply.

2019年12月27日 · You use ICMP to find out which resources are unreachable and the locations from which they can’t be reached. Then, you use trace to locate the point at which network connectivity is broken. Finally, you fix the errors that you find …

2020年3月31日 · 13.3.4 Module Quiz – ICMP Answers. 1. What is a function of the tracert command that differs from the ping command when they are used on a workstation? The tracert command reaches the destination faster. The tracert command shows the information of routers in the path. The tracert command sends one ICMP message to each hop in the path.

This is the thirteenth module of a series of videos I will publish on the Cisco NetAcad (CCNA) Introduction to Networks Course (ITN version 7). In this lecture, we will discuss the Internet...

2019年7月15日 · ICMP Internet Control Message Protocol is an internet layer protocol in TCP/IP model. The ICMP protocol provides error reporting, troubleshooting of network devices in a network. ICMP works with IP protocol, as IP protocol is a connectionless and unreliable protocol. ICMP is mostly used by ping and traceroute command. Data lost reporting is ...

2020年12月9日 · ICMP协议的功能 其功能主要有：侦测远端主机是否存在，建立及维护路由资料，重导资料传送路径（ICMP重定向），资料流量控制。ICMP在沟通之中，主要是透过不同的类别(Type)与代码(Code) 让机器来识别不同的连线状况。 ICMP工作原理 ICMP提供一致易懂的出错报 …

CCNA1-ITNv7 - Module 13 - ICMPPreparing students for Cisco 200-301 CCNALecture Playlisthttps://www.youtube.com/playlist?list=PL1U-z6tCj5WAakxzJFWN0y3jvOfklHq...