Cisco Cyber Security Practice Exam

Which protocol governs communication between devices in a remote Linux lab environment accessed from a tablet?

1. FTP

2. HTTP

3. Secure Shell (SSH)

4. Telnet

The correct answer is: Secure Shell (SSH)

Secure Shell (SSH) is the appropriate protocol for governing communication between devices in a remote Linux lab environment, especially when accessing the system from a tablet. SSH is designed specifically for secure remote login and command execution, allowing users to connect to devices over an insecure network while ensuring that both authentication and data transmission are encrypted. This encryption is crucial in a lab environment to protect against eavesdropping and data tampering. Using SSH provides a robust layer of security through strong encryption algorithms and enables secure access to the command line of a remote Linux system. It also supports various authentication methods, including password authentication, public key authentication, and more, enhancing its versatility and security. While other protocols such as FTP and Telnet can facilitate communication with devices, they do not provide the same level of security. FTP, for instance, does not encrypt its traffic, making it vulnerable to interception. Telnet also transmits data in plain text, which is not suitable for secure sessions. HTTP can be used for web traffic but lacks encryption unless paired with HTTPS, which is not specifically intended for command-line access. Thus, SSH stands out as the most secure and suitable choice for remote administration in this context.