nc

NC (Netcat) is a versatile and powerful command-line tool used for network connection and data transfer. It stands for "network cat" and is available on various operating systems, including Linux, Windows, and macOS.

1. NC allows users to create TCP and UDP connections, listen on ports, and send and receive data over network sockets.
2. It can function as both a client and a server, making it useful for debugging network-related issues or as a network swiss army knife.
3. NC provides a simple and efficient way to test network connectivity between hosts.
4. It supports port scanning, allowing users to check for open or closed ports on a target machine.
5. Users can use NC to execute remote commands on a server and send the output back to their local machine.
6. It enables file transfers between computers using the built-in file transfer capabilities.
7. NC supports both IPv4 and IPv6 protocols, making it flexible and compatible with modern network environments.
8. It can be used for remote administration, allowing users to establish an interactive shell or backdoor on a host.
9. NC supports SSL/TLS encryption, enabling secure communication between client and server.
10. It is often used in conjunction with other command-line tools for network troubleshooting, penetration testing, or network exploitation.