When performing digital reconnaissance or penetrating testing, it's important to fingerprint a network by understanding what servers or devices sit between your system and a target. For example, security professionals can't go straight to attacking a web server without first taking the time to see if there's a firewall in front of it.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-use-traceroute-on-kali-linux