H3C Constructing Secure optimized WANs v2.0 : GB0-391 Exam Questions

  • Exam Code: GB0-391
  • Exam Name: Constructing Secure optimized WANs v2.0
  • Updated: Oct 01, 2026
  • Q&As: 468 Questions and Answers

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H3C GB0-391 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: WAN Optimization and QoS15%- Congestion management and avoidance
- Traffic policing and shaping
- QoS models and service classification
Topic 2: Traditional VPN Technologies20%- GRE VPN principle and configuration
- L2TP VPN principle and configuration
- VPN basic concepts and classification
Topic 3: Secure VPN Technologies25%- SSL VPN architecture and application scenarios
- Data security fundamentals: encryption, integrity, PKI
- IPSec VPN architecture, principle and configuration
Topic 4: Broadband Access Technologies15%- ADSL/ADSL2+ access technology
- EPON/GPON technology and deployment
- PPPoE principle and configuration
Topic 5: Overview of Secure and Optimized WAN10%- Remote network connection requirements
- Key technologies for secure and optimized WAN
Topic 6: BGP/MPLS VPN15%- MPLS basic concepts and label operation
- BGP/MPLS VPN architecture and deployment
- MPLS LDP protocol

H3C Constructing Secure optimized WANs v2.0 Sample Questions:

Question #1

According to Nquist 's theorem, the telephone system samples human voice ______ times per second in order to fully express the characteristics of the voice signal.( Fill in Arabic numerals )

Reveal Solution  Discussion  0

Correct Answer:

8000

Question #2

From the perspective of network level, business or application, network security threats come from _____ .

  • A. Ann -wide threat posed by loopholes in the system
  • B. disease threats toxic
  • C. network security threats, network layer
  • D. should be threatened with a security layer
  • E. set up equipment on their own physical security threats
Reveal Solution  Discussion  0

Correct Answer: A,B,C,D,E  🗳️

Question #3

Which of the following codes has the lowest bandwidth requirement?

  • A. G.711
  • B. G.723
  • C. G.729
  • D. G.726
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #4

During the SIP UA calling the called party through the proxy server,

  • A. behalf of the proxy server to help get the called UA after position, calling UA directly to the called UA initiates a call
  • B. Lord called UA all messages are forwarded through a proxy server
  • C. In addition to the external location request message, the main called UA other messages do not need to be forwarded through a proxy server
  • D. to the not right
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Question #5

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

  • A. IP|UDP|RTCP|RTP| Voice data
  • B. IP| Voice Data
  • C. IP|UDP|RTP| Voice data
  • D. IP|TCP |RTP| voice data
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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