# Chapter 2. The Ping tab

# 2.1. What is it?

The `ping(8)` command sends ICMP `ECHO_REQUEST` packets to network hosts to check for network reachability. A response from a host (or anything that have an IP address) says that this host is running at least a TCP/IP network stack and indicates that the network route to go to this host is opened. The ping tab allows the execution of the `ping(8)` command.