单项选择题

Which of these tools should you use to compress VoIP packets on a low-speed Frame Replay circuit?（）

A. Cisco Proprietary payload compression
B. Predictor payload compression
C. RTP header compression
D. TCP header compression

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单项选择题

Which version of NTP was the first to support cryptographic authentication?（）

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

单项选择题

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

单项选择题

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