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H3C GB0-391 Exam Syllabus Topics:

H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. a - H.323 gateway received when registering with the gatekeeper RCF message stating ____ .

A) net off registration request is being processed gateway
B) Net observe accepted the registration of the gateway
C) network related parameters transmitted error
D) network gatekeeper refused to register the gateway

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

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

3. Regarding echo in the VoIP telephone system, which of the following descriptions are correct ?

A) In a VoIP network, the echo is related to the choice of encoding.The greater the compression ratio, the greater the relative echo in the network.
B) back sound into electrical echo and acoustic echo, a conventional telephone system is mainly due to two electrical echo, four-wire conversion impedance mismatch caused by
C) language voice gateway equipment itself does not bring new echo, but the lP network brings network latency, increasing the echo time delay, leading to the original feel of the echo in VoIP become energy network Felt echo
D) speech voice gateway when performing analog to digital conversion may introduce echo, but can be configured to suppress echo in voice gateway function to reduce this effect

4. In the BGP MPLS VPN networking, which of the following locations will the RD prefix exist ______ .

A) In the routing update message exchanged between PEs
B) In the private network packet forwarded by the PE to the P device
C) In the private network packet forwarded by PE to CE
D) In the route cancellation message exchanged between PEs

5. Based on SOA network architecture to enterprise IT systems into which of the following levels ? ( Select one or more )

A) base infrastructure layer
B) will then layer
C) mesh network layer
D) should application layer

Solutions: