單項(xiàng)選擇題Which version of NTP was the first to support cryptographic authentication?()

A.Version 1
B.Version 5
C.Version 4
D.Version 3


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1.單項(xiàng)選擇題How does NTP help you troubleshoot network problems?()

A. By calculating the time offset from the GPS or atomic clock
B. By setting the router clock to the default value if the router can't connect to a time server
C. By setting all network devices to the correct time
D. By setting necessary time date in the timestamp information

2.單項(xiàng)選擇題

Which of the following can we draw from the given information concerning the class-map "all-traffic"?()

A. The class-map "all-traffic" will match all traffic with ip precedence 4 and 5
B. The class-map "all-traffic" will match all traffic with dscp 18 or dscp 43
C. The class-map "all-traffic" will match all traffic with ip precedence 0 or 1
D. The class-map "all-traffic" will match all traffic with dscp 18 and dscp 43

3.單項(xiàng)選擇題Which one of these class maps was configured to match traffic for CS5?()

A. CIS 1# show class-map forward Class map match-all forward ( id 3) Match ip dscp 18
B. CIS1#show access-map block Class map match-all block (id 4) Match ip dscp 43
C. CIS1# show class-map real-time Class map match-all block (id 5) Match ip dscp 16
D. CIS 1# show class-map pass Class map match-all real-time (id 2) Match ip dscp 40

5.單項(xiàng)選擇題

You are troubleshooting an issue which is causing full-sized packets entering the MPLS cloud be dropped. You have discovered that one of the switches in the MPLS core is not a Cisco switch, but otherwise the MPLS MTU size is set to 1508 bytes on the routers.
Based on this information, which of these may be the reason the packets are being dropped?()

A. The switch on you MPLS core that was not produced by Cisco does not support oversized packets
B. No switches support oversized packets
C. By definition, the maximum MTU is 1500 bytes
D. As MPLS VPN labeling increases the size of the packet by 8 bytes, the IP MTU should have been changed to 1508

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