Secure Shell (SSH)

Question 1

What protocol creates a secure channel between two devices, so that one device can control the other?

Answer 1

Secure Shell

Note: SSH was designed as a replacement for TELNET. It is very heavily used in Unix/Linux and Windows.

Question 2

What are the two requirements to use SSH?

Answer 2

A server (daemon) and a client on the other device that will take control of the daemon.

Question 3

What port does SSH run on and what about Secure FTP?

Answer 3

Port 22

Note: Secure copy also runs on Port 22.

Question 4

What encryption protocol does SSH 2.0 use?

Answer 4

Diffie-Hellman Key Exchange and Message Authentication Codes (MAC)

Note: SSH is used frequently in security.