Netcat, also known as the "Swiss Army knife" of networking, is a powerful command-line tool for data communication over networks.
A reverse shell is a technique used in penetration testing to bypass firewalls or network restrictions by establishing a connection from the target machine to the attacker's machine.
Various methods can be used with Netcat to set up a reverse shell, including Netcat simple shell, Netcat with mkfifo, Python, MSFvenom (Metasploit), PowerShell, and Ruby.
Netcat can also be used for file transfer, UDP mode for sending and receiving UDP packets, port forwarding, and port redirection.