Internet Control Message Protocol (ICMP) is one of the protocols of the TCP/IP suite.
ICMP echo request and the
ICMP echo reply messages are commonly known as
Ping is a troubleshooting tool used by system administrators to manually test for connectivity between network devices, and also to test for network delay and packet loss. The
ping command sends an
ICMP echo request to a device on the network, and the device immediately responds with an
ICMP echo reply. Sometimes, a company’s network security policy requires
ICMP echo reply) to be disabled on all devices to make them more difficult to be discovered by unauthorized persons.