A.tunneling
B.hashing
C.routing
D.NAT

A.認(rèn)證
B.控制中心
C.授權(quán)
D.記賬和審計(jì)

A.when they receive a special token
B.when there is a carrier
C.when they detect no other devices are sending
D.when the medium is idle
E.when the server grants access

A.思科一步鎖閉
B.安全審計(jì)向?qū)?br /> C.思科自動(dòng)安全
D.一鍵關(guān)閉

A.NIC
B.BIA
C.OUI
D.VAI

A.兩次成功登錄之間的延遲
B.如果檢測到DoS攻擊，應(yīng)關(guān)閉登錄
C.加密所有密碼
D.為登錄建立系統(tǒng)日志

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

A.Addresses in a private range will be not routed on the Internet backbone.
B.Only the ISP router will have the capability to access the public network.
C.The NAT process will be used to translate this address in a valid IP address.
D.Several automated methods will be necessary on the private network.
E.A conflict of IP addresses happens, because other public routers can use the same range.