What is the function of WSAV in network security?

The correct answer pertains to the role of WSAV (Web Security Application Virtualization) in network security, particularly its function as a proxy server. In the context of shipboard networks, using WSAV allows for effective management and filtering of internet traffic. As a proxy server, WSAV can monitor and control the data that enters and leaves the network. This helps enhance security by preventing direct access to the internal network from external sources while still allowing users onboard to access the internet safely.

By serving as a mediator, WSAV not only helps in protecting sensitive information and systems from potential cyber threats but also optimizes bandwidth usage and improves the overall efficiency of internet connectivity for onboard systems. This is crucial in a maritime environment where both usability and security are of high importance.

In contrast, other roles such as blocking unauthorized access, acting as a firewall for internal communication, or providing general internet access don't accurately represent the specific responsibilities or capabilities of WSAV as a proxy server. The focus here is on its function to manage and filter traffic, which is central to maintaining security in the context described.