单项选择题Which name describes an IPV6 host-enable tunneling technique that uses IPV4 UDP,does not require dedicated gateway tunnels,and can pass through existing IPV4 NAT gateways?()

A. dual stack
B. dynamic
C. Teredo
D. Manual 6to4


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1.单项选择题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

2.单项选择题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.单项选择题Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?()

A. IETF
B. HDLC
C. Q9333-A Annex A
D. ANSI Annex D

4.单项选择题What is the default administrative distance of OSPF?()

A. 120
B. 100
C. 90
D. 110

6.单项选择题Which statement is true, as relates to classful or classless routing?()

A. Automatic summarization at classful boundries can cause problems on discontinuous subnets
B. EIGRP and OSPF are classful routing protocols and summarize routes by default
C. RIPv1 and OSPF are classless routing protocols
D. Classful routing protocols send the subnet mask in routing updates

7.单项选择题Which device might be installed at a branch office to enable and manage an IPsec site-to-site VPN?()

A. Cisco IOS IPsec/SSL VPN client
B. Cisco VPN Clinet
C. ISDN terminal adapter
D. Cisco Adaptive Security Appliance

8.单项选择题At which layer of the OSI model is RSTP used to prevent loops?()

A. data link
B. network
C. physical
D. transport

10.单项选择题which command allows you to verify the encapsulation type CISCO OR IETF for a frame relay link?()

A. show frame-relay map
B. show frame-relay lmi
C. show inter serial
D. show frame-relay pvc

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