单项选择题Which IPv6 address would you ping to determine if OSPFv3 is able to send and receive unicast packets across a link? ()

A. anycast address
B. site-local multicast
C. global address of the link
D. unique local address
E. link-local address


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1.多项选择题Which two combinations are valid PAgP configurations that will set up a PAgP channel?()

A.On-Passive
B.On-Auto
C.Passive-Active
D.Desirable-Auto
E.Active-Active
F.Desirable-Desirable

2.单项选择题Which information is carried in an OSPFv3 intra-area-prefix LSA? ()

A. IPv6 prefixes
B. link-local addresses
C. solicited node multicast addresses
D. IPv6 prefixes and topology information

3.单项选择题Which of these statements best describes the major difference between an IPv4-compatible tunnel and a 6to4 tunnel? ()

A. An IPv4-compatible tunnel is a static tunnel, but an 6to4 tunnel is a semiautomatic tunnel.
B. The deployment of a IPv4-compatible tunnel requires a special code on the edge routers, but a 6to4 tunnel does not require any special code.
C. An IPv4-compatible tunnel is typically used only between two IPv6 domains, but a 6to4 tunnel is used to connect to connect two or more IPv6 domains.
D. For an IPv4-compatible tunnel, the ISP assigns only IPv4 addresses for each domain, but for a 6to4 tunnel, the ISP assigns only IPv6 addresses for each domain.

5.单项选择题Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer? ()

A. prefixes received from any other BGP peer and prefixes locally originated via networkstatements or redistributed to BGP
B. all prefixes in its IP routing table
C. only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed
D. only prefixes received from EBGP peers and prefixes received from route reflectors
E. all prefixes in its routing table except the prefixes received from other EBGP peers
F. all prefixes in its routing table except the prefixes received from other IBGP peers

7.单项选择题Which configuration is used to enable root guard?()

A.interface gig3/1  spanning-tree guard root
B.interface gig3/1  spanning-tree root guard
C.interface gig3/1  spanning-tree root-guard
D.interface gig3/1  spanning-tree root-guard default

8.单项选择题Which types of prefixes will a router running BGP most likely advertise to an IBGP peer, assuming it is not configured as a route reflector? ()

A. prefixes received from any other BGP peer and prefixes locally originated via network statements or redistributed
B. all prefixes in its routing table
C. prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed
D. prefixes received from EBGP peers and prefixes received from route reflectors
E. prefixes received from other IBGP peers, prefixes received from EBGP peers, and prefixes redistributed to BGP
F. prefixes received from other IBGP peers and prefixes received from route reflectors

9.多项选择题Which two statements are true about 802.1s?()

A.802.1s supports a reduced number of spanning-tree instances.
B.802.1s has better convergence times than 802.1w.
C.802.1s does not support load balancing over the same physical topology.
D.The CPU utilization for 802.1s is lower than the CPU utilization for 802.1w.

10.单项选择题To troubleshoot network issues more accurately, milliseconds should be included in the syslog of the router.Which command will achieve this?()

A.service timestamps log datetimec msec
B.logging timestamps msec
C.syslog timestamps hour minute second miliseconds
D.service logging timestamp msec
E.logging service timestamp msec

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