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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.

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1.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

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2.多項選擇題實施ACL時應(yīng)注意的問題（）

A.默認(rèn)拒絕所有流量
B.不需要配置到具體端口
C.過濾方向
D.語句的次序

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3.多項選擇題The network technician is planning to use the 255.255.255.224 subent mask on the network.which threevalid IP addresses can the technician use for the hosts？（）

A.172.22.243.127
B.172.22.243.191
C.172.22.243.190
D.10.16.33.98
E.10.17.64.34
F.192.168.1.160

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4.多項選擇題擴(kuò)扎ACL的編號范圍為（）

A.1~99
B.100~199
C.1300~1999
D.2000~2699

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5.單項選擇題A router has two FastEthernet interfaces and needs to connect to four vlans in the local network.How canyou accomplish this task，using the fewest physical interfaces and withoutdecreasing networkperformance？（）

A.Add two more FastEthernet interfaces.
B.Add a second router to handle the vlan traffic.
C.Use a hub to connect the four vlans with a FastEthernet interface on router.
D.Implement a router-on-a-stick configuration.

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