A cybersecurity student is learning about Netcat commands that could be used in a penetration testing engagement. The student wants to use Netcat as a port scanner. What command should be used?

Explanation & Hint:

Several Netcat commands can be used in a penetration testing engagement. Some of them are the following:

• nc -nv <IP address> <Port> – to connect to a TCP port
• nc -lvp <port> – to listen on a given TCP port
• nc -lvp 1234 > output.txt (receiving system) and nc -nv <IP address> <input.txt (sending system) – to transfer a file
• nc -z <IP address> <port range> – to be used as a port scanner