多項選擇題相對標準和靜態(tài)擴展ACL，動態(tài)ACL有哪些優(yōu)勢（）

A.每個用戶的挑戰(zhàn)驗證機制
B.簡化路由器對ACL的處理
C.降低網絡黑客對網絡的攻擊機會
D.在不損害其他安全配置的前提下，可以動態(tài)的讓用戶穿越防火墻


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1.單項選擇題Which component of VPN technology ensures that data can be read only by its intended recipient?（）

A.data integrity
B.encryption
C.key exchange
D.authentication

2.多項選擇題Which router IOS commands can be used to troubleshoot LAN connectivity problems？（）

A.ping
B.tracert
C.ipconfig
D.show ip route
E.winipcfg
F.show interfaces

4.單項選擇題What is the effect of using the service password-encryption command？（）

A.nly passwords configured after the command has been entered will be encrypted.
B.Only the enable password will be encrypted.
C.Only the enable secret password will be encrypted
D.It will encrypt the secret password and remove the enable secret password from the configuration.
E.It will encrypt all current and future passwords.

5.多項選擇題Which two commands correctly verify whether port security has been configured on port FastEthernet 0/12 on a switch?（）

A.SW1#show swithport port-security interface FastEthernet 0/12
B.SW1# show swithport port-secure interface FastEthernet 0/12
C.SW1# show port-secure interface FastEthernet 0/12
D.SW1#show running-config