Learn which protocol provides secure, encrypted remote access to network devices for the CCNA 200-301 exam. Understand why SSH is preferred over Telnet for secure network management.
Table of Contents
Question
What protocol is used for secure remote access to network devices and encrypts all communication?
A. Telnet
B. RSH
C. FTP
D. SSH
E. HTTP
Answer
D. SSH
Explanation
SSH (Secure Shell) encrypts remote access communication, unlike Telnet, which transmits data in plaintext.
SSH (Secure Shell) is the protocol used for secure remote access to network devices, encrypting all communication between the client and server. SSH operates on TCP port 22 and ensures that all data—including passwords and commands—is transmitted securely, protecting against eavesdropping and on-path attacks. Unlike Telnet, which sends data in plaintext, SSH uses strong encryption and supports multiple authentication methods, making it the industry standard for secure device management in modern networks.
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