Which two statements about Telnet and SSH are true? (Choose two.)
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A. B. C. D. E.AC.
A. SSH is a protocol that provides a secure remote access connection to network devices: This statement is true. Secure Shell (SSH) is a network protocol that provides secure remote access to network devices over an unsecured network. It encrypts all traffic between the client and server, ensuring that sensitive information such as login credentials, commands, and data are protected from eavesdropping and tampering.
B. SSH uses the well-known TCP port 23 for its communication: This statement is false. SSH uses TCP port 22 for its communication, not port 23. Port 23 is used by Telnet, a less secure protocol than SSH.
C. A Telnet network management connection is dropped when a router reboots: This statement is true. Telnet is a connection-oriented protocol that requires a constant connection between the client and server. When the server reboots, the connection is terminated, and the user must establish a new connection. In contrast, SSH is a connection-oriented protocol that supports connection persistence, allowing the user to resume their session after a server reboot.
D. Telnet is a protocol that provides a secure remote access connection to network devices: This statement is false. Telnet is a protocol that provides remote access to network devices but is not secure. Telnet sends all data, including login credentials, commands, and data, in clear text, making it susceptible to eavesdropping and tampering.
E. Telnet is preferred over SSH for security reasons: This statement is false. SSH is preferred over Telnet for security reasons because it encrypts all traffic between the client and server, while Telnet sends all data in clear text. SSH also provides other security features, such as public-key authentication and host key verification, that Telnet does not support.