A.data integrity B.encryption C.key exchange D.authentication
A.ip default-gateway 0.0.0.0 B.ip route 172.16.2.1 0.0.0.0 0.0.0.0 C.ip default-network 0.0.0.0 D.ip default-route 0.0.0.0 0.0.0.0 172.16.2.1 E.ip route 0.0.0.0 0.0.0.0 172.16.2.1
A.point-to-point B.broadcast multi-access C.nonbroadcast multi-access D.nonbroadcast multipoint E.broadcast point-to-multipoint