Which NetCat option specifies a program to execute after a connection is established?

• A. -p
• B. -e
• C. -w
• D. -vv

Answer: (B)

The concept being tested is how Netcat can hand off a connected socket to an external program. When you specify an external program to run after a connection is established, Netcat will launch that program and connect its standard input and output to the network socket. This means the connected endpoint can communicate directly with the spawned program as if it were a part of the shell, effectively letting that program handle all I/O over the connection (common uses include spawning a shell or running a custom agent).

This is why the correct option is the one that designates a program to execute after the connection is up: Netcat replaces itself with the specified program and wires the socket to the program’s standard streams. The other options control things like which port to use, how long to wait before timing out, or how verbose Netcat’s output is, but none of them cause a program to run automatically once the connection is established.