多項選擇題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.


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1.單項選擇題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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題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

5.單項選擇題

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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