An administrator would like to decrease the load time of common websites that employees review daily. Which of the following can be installed?

Load balancing distributes incoming traffic across multiple servers to prevent overload on a single server; it does not cache content or reduce internet fetch times for end users.

A VPN concentrator aggregates and manages VPN tunnels for secure remote access; it does not store or serve web content locally.

A caching (proxy) server intercepts web requests, stores a local copy of the retrieved content, and serves that cached copy to subsequent requestors without contacting the origin server. This reduces bandwidth consumption and dramatically decreases load times for websites that employees visit regularly, because content is retrieved from the local network instead of the internet.

Fault tolerance refers to redundancy mechanisms that keep systems operational during a failure; it does not address content delivery speed or load times.