A.DES
B.3DES
C.AES
D.SEAL

A.access-list 50 deny 192.168.1.1 0.0.0.255
B.access-list 110 permit ip any any
C.access-list 2500 deny tcp any host 192.168.1.1 eq 22
D.access-list 101 deny tcp any host 192.168.1.1

A.生成
B.驗(yàn)證
C.存儲(chǔ)
D.撤銷和銷毀

A.The address is a broadcast address
B.The Ehernet interface is faulty
C.VLSM-capable routing protocols must be enable first on the router.
D.This address is a network address.

A.2031：0：130F：：9C0：876A：130B
B.2001：0DB8：0000：130F：0000：0000：08G
C.140BC.2001：0DB8：0：130H：：87C：140B
D.2031：：130F：：9C0：876A：130B

A.MD5
B.RSA
C.HMAC
D.SHA-1

A.you can apply multiple access lists with the same protocol or in different…
B.you can config one access list，per direction，per layer 3 protocol
C.you can place as many access lists as you want on any interface
D.you can apply ony one access list on any interface

A.to confine network instability to single areas of the network
B.to reduce the complexity of router configuration
C.to speed up convergence
D.to lower costs by replacing routers with distribution layer switches
E.to decrease latency by increasing bandwidth
F.to reduce routing overhead

A.The is a virtually limitless supply of IP addresses
B.Telnet access requires a new password at first login
C.Telnet access requires a password
D.Telnet access is denied

A.認(rèn)證
B.完整性
C.確認(rèn)機(jī)制
D.機(jī)密性