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H3C GB0-391 Exam Syllabus Topics:

H3C Constructing Secure optimized WANs v2.0 Sample Questions:

Question 1

The following statements about PKI workflow are correct.

A. solid body needs to revoke the certificate RA application
B. permit book application made by the entity
C. solid body identity reviewed by RA completed
D. Certificate book by the CA issued

Question 2

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

A. 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
B. 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.
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. 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

Question 3

For the label forwarding table of an LSR , the correct description is _______ .

A. with a label forwarding entry into the outgoing label and tag values are always the same
B. can be present label value into two identical label forwarding entry
C. with a label forwarding entry Incoming label and outgoing label can not be the same
D. may be present in the same label value two label forwarding entry

Question 4

When SIP-UA calls the called party through the proxy server, ____ .

A. In addition to the external location request message, the calling UA other messages need not be forwarded through a proxy server
B. In this environment, the called UA response message is sent instead of the main junction proxy called UA
C. to the not right
D. Lord called UA All messages are forwarded through a proxy server

Question 5

Which of the following descriptions about H.323 terminals are correct?

A. & Poor pass H.323 terminal may not support fax functionality
B. P through PST telephone is a standard H.323 terminal
C. even connected to the PSTN telephone network fax machine is a standard H.323 terminal equipment
D. P pass H.323 terminals may not support the video feature

Solutions: