CMD

Some command line based networking tools include,

ping
traceroute
nslookup (bind package in archlinux)
telnet (inetutilspackage in archlinux)

GUI

wireshark
cisco packet tracer

App specific

Wireshark

Archlinux

To install in Archlinux,

yay wireshark

for GUI, install the wireshark-qt one.

Add your user to the wireshark usergroup.

sudo usermod -a -G wireshark $(whoami)

And re-login and reboot.

Cisco packet tracer

Switch mac-address-table

In the CLI, hit enter, followed by EN (enter) and tthen type,

show mac-address-table