RHEL Linux - Red Hat System Administration Practice Exam

OpenSSH is the software implementation of what?

1. Super System Hardware

2. Secure Shell

3. SELinux Shell

4. Secure System Host

The correct answer is: Secure Shell

OpenSSH is the software implementation of Secure Shell, commonly abbreviated as SSH. Secure Shell is a protocol that provides a secure channel over an unsecured network in a client-server architecture. It allows for secure remote login, command execution, and secure file transfers, which are crucial for managing and administering systems over a potentially risky network. The name "Secure Shell" reflects the protocol's primary purpose: to create a secure environment (or "shell") for users to interact with remote systems. OpenSSH specifically is a widely used, open-source implementation of SSH that enhances security features, supports key-based authentication, and provides a variety of utilities for secure communication. Other choices do not relate to OpenSSH. For instance, “Super System Hardware” and “Secure System Host” do not have standardized definitions in the context of SSH. "SELinux Shell" refers to a feature of Linux that supports security policies but is unrelated to the purpose of OpenSSH. Thus, Secure Shell is the accurate term associated with OpenSSH.