Which of the following open ports should be closed to secure the server properly? (Choose two.)

Which of the following open ports should be closed to secure the server properly? (Choose two.)
A . 21
B. 22
C. 23
D. 53
E. 443
F. 636

View Answer

Answer: AC

Explanation:

The administrator should close ports 21 and 23 to secure the server properly. Port 21 is used for FTP (File Transfer Protocol), which is an unsecure protocol that allows file transfer between a client and a server over a network connection. FTP does not encrypt the data or the credentials that are transmitted, making them vulnerable to interception or modification by attackers. Port 23 is used for Telnet, which is an unsecure protocol that allows remote login and command execution over a network connection using a CLI. Telnet does not encrypt the data or the credentials that are transmitted, making them vulnerable to interception or modification by attackers.

Reference: https://www.csoonline.com/article/3191531/securing-risky-network-ports.html