Luis is a systems administrator at East School, and the board is requesting a network that allows students to reach Google but disallows access to X-rated websites. Which system is BEST for him to install?

Domain 4: Communication and Network Security Practice Questions
Questions from the following topics are included in this domain:   
Assess secure network design principles.   
Implement secure network design principles.  
Secure network components using network access control devices.   
Implement secure design communication channels.  
Understand data communications and virtualized networks.