Multiple choice

Which of these protocols is used by network devices to send error messages?

  1. POP

  2. HTTP

  3. FTP

  4. ICMP

  5. IP

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Internet Control Message Protocol (ICMP) is one of the main protocols of the Internet Protocol Suite. It is used by network devices, like routers, to send error messages indicating; that a requested service is not available or that a host or router could not be reached.