Which of the following is true regarding remote configuratio

Which of the following is true regarding remote configuration access methods to a Cisco device?

A. Telnet, using port 22, requires a login and is a secure access method.

B. Telnet, using port 23, requires a login and is a secure access method.

C. SSH, using port 23, encrypts all communication.

D. SSH, using port 22, encrypts all communication.

Solution

D is correct. SSH uses port 22 and encrypts the communication session.

A, B, and C are incorrect. A is incorrect because Telnet does not use port 22. B is incorrect because Telnet uses port 23 but is not considered a secure access method since all data is transmitted in clear text. C is incorrect because SSH does not use port 23.