A zero-day vulnerability is discovered that affects a specific network device. This vulnerability only affects services on port 21. This network device is restricted to use only secure protocols and services. Which of the following explains why this device is secure?
A) Because secure protocols would reject malicious packets
B) Because SCP is not a secure service
C) Because FTP is not a secure service
D) Because a secure firewall will protect the device

Question

Quizplus · Accepted Answer

Port 21 is typically used for FTP, which is not a secure service. If the device is restricted to using only secure protocols, it would not be using FTP, thus not affected by the vulnerability.

A Zero-Day Vulnerability Is Discovered That Affects a Specific Network