An attacker runs the netcat tool to transfer a secret file between two hosts.

Netcat does not support encryption natively. To securely transmit data over the network, the attacker must use a variant like Cryptcat, which adds symmetric encryption to standard netcat functionality.

From CEH v13 Courseware:

Module 8: Sniffing and Secure Communication

CEH v13 Study Guide states:

“Cryptcat is a netcat clone that supports encryption. For secure file transfers or remote shell access, cryptcat is the recommended tool.”

Incorrect Options:

A/B/C: These are invalid or non-existent netcat parameters.