Which of the following is the default port for Secure Shell (SSH)?

A.
UDP port 161

B.
TCP port 22

C.
UDP port 138

D.
TCP port 443

Explanation:

Secure Shell (SSH) is a protocol that provides strong authentication and secure communications over
unsecured channels. It uses public key encryption as the main method for user authentication. SSH
secures connections over the Internet by encrypting passwords and other data. It also protects
networks against IP spoofing, packet spoofing, password sniffing, and eavesdropping. SSH uses TCP
port 22 as the default port and operates at the application layer.
SSH protocol has the following three components.
1.Transport layer protocol
2.User authentication protocol
3.Connection protocol
Answer option D is incorrect. TCP port 443 is the default port for Hypertext Transfer Protocol Secure
(HTTPS) and Secure Socket Layer (SSL).
Answer option A is incorrect. UDP port 161 is the default port for Simple Network Management
Protocol (SNMP).
Answer option C is incorrect. UDP port 138 is the default port for the NetBIOS datagram service.
TechNet, Contents. “Ask Us About… Security, January 2001”