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H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. A VoIP network is interconnected with a PSTN network and adopts the H.323 protocol.It is required that in addition to normal voice calls, it must also be able to conduct telephone conferences with more than three rooms.The VoIP network must include H.323 components including

A) terminating end
B) network gatekeeper
C) MCU
D) net off

2. The advantages of the hierarchical network model include ___ .( Choose one or more )

A) by strong network scalability
B) will be to maintain the network of
C) provide high network throughput
D) drop low-end delay

3. The encapsulation format of the voice data transmitted in the VoIP network data is ______ .

A) IP|UDP|RTCP|RTP| Voice data
B) IP|RTP| voice data
C) IP|UDP|RTP| voice data
D) IP|TCP |RTP| voice data

4. The following statement about VoIP voice transmission is wrong

A) needs to UDP provides a time stamp mechanism
B) needed to TCP to provide reliability mechanisms
C) need to RTP to provide re-ordering mechanism
D) need to UDP provides multiplexing mechanism

5. The interconnection between ordinary telephones, PBX and other equipment has a unified interface standard, including analog and digital interfaces.The following are analog voice interfaces.

A) T1
B) E1
C) FXO
D) FXS

Solutions: