Olulowo is a network engineer asked to install an internal DNS server for staff and a separate DNS server on the internet for the public. He decides to install which type of setup?

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.