Why is SSH preferred over Telnet for device management?

Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

Technical deep dive

How to think about this question

Secure Shell (SSH) is a network protocol that provides administrators with a secure way to access and manage network devices remotely. Unlike Telnet, which transmits data in plaintext, SSH encrypts all session traffic, including usernames, passwords, and commands, ensuring confidentiality and integrity. This encryption protects against eavesdropping and man-in-the-middle attacks, which are critical concerns in modern network security. SSH operates over TCP, typically using port 22, and supports strong authentication methods, including password and public key authentication. When choosing between SSH and Telnet for device management, Cisco devices and the CCNA exam emphasize the security benefits of SSH. Telnet sends all data unencrypted over the network, making it vulnerable to interception and credential theft. SSH’s encryption and authentication mechanisms make it the preferred protocol for managing Cisco routers, switches, and other network devices securely. Cisco IOS supports SSH configuration to replace Telnet, aligning with best practices for network security and compliance. A common exam trap is confusing SSH’s transport protocol or security features. For example, some might incorrectly believe SSH uses UDP or does not require authentication, which is false. Understanding that SSH uses TCP and mandates authentication helps avoid this mistake. Practically, network engineers must disable Telnet and enable SSH on Cisco devices to ensure secure remote management, especially in environments where sensitive data and device configurations are at risk.

More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

FAQ

Questions learners often ask