单项选择题You are using VTP version 2 in your network to transport VLAN information between switches. When adding a switch to the network that has been used in the lab previously, you notice that a lot of the existingVLANs have been deleted or replaced with other names. What can you do to prevent this from happeningin the future, without losing all VTP features that you are using today?()

A.configure a hard-to-guess VTP domain name
B.use a hard-to-guess VTP password
C.use VTP transparent mode
D.implement VTP version 3


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1.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

3.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

4.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

5.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.

6.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

7.单项选择题Which NetFlow version should be used to collect accounting data for IPv6 traffic?()

A.version 1
B.version 5
C.version 7
D.version 8
E.version 9

8.单项选择题Which configuration would make an IP SLA probe use a precedence value of 3?()

A.ip sla 1  icmp-echo 1.1.1.1 tos 12
B.ip sla 1  icmp-echo 1.1.1.1 tos 96
C.ip sla 1  icmp-echo 1.1.1.1 precedence 3
D.ip sla 1  icmp-echo 1.1.1.1 dscp 12

9.单项选择题On a router that is configured with multiple IP SLA probes, which command can be used to manage the CPU load that was created by the periodic probing?()

A.ip sla monitor low-memory
B.ip sla group schedule
C.ip sla reaction-trigger
D.ip sla enable timestamp

10.单项选择题

Refer to the exhibit. In this network, R1 is configured not to perform autosummarization within EIGRP. What routes will R3 learn from R2 through EIGRP? ()

A. 172.30.1.0/24 and 10.1.2.0/24;EIGRP only performs autosummarization at the edge between two major networks.
B. 172.30.0.0/16 and 10.1.2.0/24;R2 will perform autosummarization although R1 will not.
C. Since R2 is configured without autosummarization, it will not propagate the 172.30.1.0/24 route.
D. 172.30.0.0/8 and 10.0.0.0/8.

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