A border router should be placed on which of the following?

A. Web server

B. IDS server

C. Screened subnet

D. Domain boundary

Explanation:

A border router should be placed on a (security) domain boundary. Placing it on a web server or screened subnet, which is a demilitarized zone (DMZ) would not provide any protection. Border routers are positioned on the boundary of the network, but do not reside on a server.