A. VTP B. 802.1q C. IGP D. ISL E. 802.3u
A.HMAC-MD5 B.RSA C.HMAC-SHA-1 D.DH1 E.DH2
A.Router(config)#router ospf 1 B.Router(config)#router ospf 0 C.Router(config)#router ospf area 0 D.Router(config-router)#network 192.168.16.0 0.0.0.255 area 0 E.Router(config-router)#network 192.168.16.0 0.0.0.255 0 F.Router(config-router)#network 192.168.16.0 255.255.255.0 area 0