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H3C GB0-391 Exam Syllabus Topics:

H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. An employee of a company often travels on business.In order to facilitate access to company resources, which of the following L2TP access and authentication methods should he use____

A) LAC certification
B) LNS certification
C) alone stand L2TP mode
D) passenger door LAC mode

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

A) 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
B) 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
C) 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
D) 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.

3. In the H.323 protocol, which of the following protocols is used to negotiate the capabilities of the two parties ?

A) H.261
B) H.245
C) H.263
D) H.225.0

4. In the L2TP networking, the command for configuring LNS to perform mandatory LCP renegotiation authentication for users is ____ .

A) Configure manclator-lcp in the global view
B) Configure authentication-mode mandator-lcp in the L2TP-group view
C) In the L2TP-group view, configure mandator lcp
D) In the L2TP-group view, configure mandator-lcp

5. When the user uses the phone, after the telephone handle of the room starts to input the called number, which of the following signaling does the ringing of the called phone belong to ____ ?

A) monitoring tube signaling
B) to address signaling
C) letter information signaling
D) Call call signaling

Solutions: