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?（）

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

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

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

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

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

单项选择题Which address is the IPV6 all-RIP-routers muticast group address that is used by RIPng as the destaion address?（）

A. FF02::A
B. FF05::101
C. FF02::9
D. FF02::6