which address range efficiently summarizes the routing table of the addresses for router main?()
A.172.16.0.0/18 B.172.16.0.0/16 C.172.16.0.0/20 D.172.16.0.0/21
A.Connect a router on a local network. B.Connect a router to another router. C.Allow distribution of routes between networks. D.Translate a private IP address. E.Connect a network to the Internet.
A.data integrity B.encryption C.key exchange D.authentication