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H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. 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

2. Which of the following statements about IKE is correct is ____ .( Choose one or more )

A) The first phase of IKE exchange mode has main mode and quick mode
B) IKE uses an asymmetric key algorithm when exchanging keys
C) The exchange of keys in both IKE modes requires authentication
D) IKE SA is generated when the second phase of IKE is completed

3. Which of the following statements about EPCN are correct?

A) EPCN system main memory deployment coaxial cable distribution network portion of the network, the HFC backbone mainly EPON technology fit therewith.
B) EPCN is a passive EoC technology.The user terminal is a passive device, and the system transmission loss tolerance is low, which limits its application scope to a certain extent.
C) EPCN is an active EoC technology, and the user terminal is an active device, thus avoiding the limitation of the network topology without passive EoC technology.
D) EPCN conforms to HFC- based broadband access specifications such as DOCSIS 1.0/1.1/2.013.0 .

4. In the EPON system, the port that the ONU device connects to the user is

A) ONU
B) OLT
C) NNI
D) UNI

5. Which of the following statements about VoIP voice transmission is correct is ______ .

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

Solutions: