What is the primary function of a Jump Box in network security?

The primary function of a Jump Box in network security is to act as a hardened server that provides access to other hosts in the Demilitarized Zone (DMZ). A Jump Box, also known as a Jump Server, is specifically configured to be a secure access point, often used to manage and control connectivity to sensitive systems without exposing those systems directly to the internet.

By using a Jump Box, an organization can enforce security controls such as monitoring and logging access attempts, limiting the number of entry points into designated systems, and reducing the attack surface for potential threats. This approach increases security by ensuring that only trusted users can access critical resources, while maintaining a buffer zone that can be more easily defended against external threats.

In contrast, other options suggest different functions that don't align with the distinct purpose of a Jump Box. For instance, providing backup for data refers to a different type of system or service altogether, while a firewall is specifically focused on filtering and controlling traffic, rather than serving as a secure entry point. Encryption pertains to securing data in transit but isn't a function associated with a Jump Box. Thus, the correct choice highlights the Jump Box's role in securing access to other hosts within a controlled environment.