單項(xiàng)選擇題Which Cisco IOS diagnostics command can disrupt the operation of a router under high-load conditions?()

A.show running-config
B.show processes cpu
C.debug all
D.logging host ip address


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1.單項(xiàng)選擇題哪個(gè)命令可以在交換機(jī)啟用RSTP? ()

A. spanning-tree mode rapid-pvst
B. spanning-tree uplinkfast
C. spanning-tree backbonefast
D. spanning-tree mode mst

2.單項(xiàng)選擇題Which command encrypts all plaintext passwords?()

A.Router(config)#password-encryption
B.Router(config)#service password-encryption
C.Router#service password-encryption
D.Router# password-encryption

3.多項(xiàng)選擇題哪兩個(gè)命令可以用來(lái)驗(yàn)證給定的Cisco交換機(jī)的中繼鏈路的狀態(tài)?()

A. show interfaces interface
B. show interfaces trunk
C. show interfaces switchport
D. show ip interface brief
E. show interfaces vlan

4.多項(xiàng)選擇題Which can be done to secure the virtual terminal interfaces on a router?()

A.Administratively shut down the interfaces.
B.Physically secure the interfaces.
C.Configure a virtual terminal password and login process.
D.Enter an access list and apply it to the terminal interfaces using the access-class command.
E.Create an access list and apply it to the terminal interfaces using the access-group command

5.多項(xiàng)選擇題Which two statements about using the CHAP authentication mechanism in a PPP link are true?()

A.CHAP uses a two-way handshake
B.CHAP authentication periodically occurs after link establishment
C.CHAP has no protection from playback attacks
D.CHAP authentication is performed only upon link establishment
E.CHAP uses a three-way handshake
F.CHAP authentication passwords are sent in plaintext

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