A few users on your network have been visiting inappropriate websites. What kind of server can you set up to filter content from a list of restricted websites?

A proxy server makes resource requests on behalf of a client. Three characteristics distinguishing proxy servers include: 
- First, the proxy server can cache the requested information, which speeds up subsequent queries. 
- Second, the proxy can serve as a filter, preventing sensitive data from leaving the network and blocking content from restricted websites. 
- Third, the proxy server can modify the information passed from the requester to the destination, masking the sender's identity and functioning as a security measure; the user can be made anonymous.
A DNS server is responsible for resolving IP addresses to domain names. A web server offers information in files that can be viewed by a web browser, whether internal to the firm or on the Internet, and an authentication server verifies a user's identity and access to resources.