 Telnet is not secure. Why do you think it is still supported and used?
Even though it is not secure (transmits data in plain text), Telnet is still supported
and used because it is very easy to set up. Telnet is also very east for the network
administrator to configure, maintain, and manage. Also, Telnet is very fast and
reliable.
 Why do you think SSH version 2 is preferred over SSH version 1?
SSH version 2 is preferred over SSH version 1 because it has an enhanced security.
SSH version 2 combats eavesdropping by encrypting all data. This encryption makes
the data unreadable to eavesdroppers.
SSH version 2 also authenticates a server’s identity by using cryptography keys. This
mechanism help SSH version 2 to fight against DNS and IP spoofing.
Also, SSH version 2 protects against man-in-the-middle attacks by ensuring a serverhost authentication.