H3C GB0-391 : Constructing Secure optimized WANs v2.0
- Exam Code: GB0-391
- Exam Name: Constructing Secure optimized WANs v2.0
- Updated: Sep 29, 2026
- Q & A: 468 Questions and Answers
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H3C GB0-391 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Overview of Secure and Optimized WAN | 10% | - Remote network connection requirements - Key technologies for secure and optimized WAN |
| Topic 2: Broadband Access Technologies | 15% | - EPON/GPON technology and deployment - PPPoE principle and configuration - ADSL/ADSL2+ access technology |
| Topic 3: Traditional VPN Technologies | 20% | - L2TP VPN principle and configuration - GRE VPN principle and configuration - VPN basic concepts and classification |
| Topic 4: WAN Optimization and QoS | 15% | - QoS models and service classification - Traffic policing and shaping - Congestion management and avoidance |
| Topic 5: Secure VPN Technologies | 25% | - SSL VPN architecture and application scenarios - IPSec VPN architecture, principle and configuration - Data security fundamentals: encryption, integrity, PKI |
| Topic 6: BGP/MPLS VPN | 15% | - BGP/MPLS VPN architecture and deployment - MPLS LDP protocol - MPLS basic concepts and label operation |
H3C Constructing Secure optimized WANs v2.0 Sample Questions:
The following description of QoS jitter is correct.
- A. transfer control IP network traffic
- B. do force to avoid network congestion
- C. branch support network of real-time business
- D. QoS can create broadband and make the use of broadband more reasonable
Correct Answer: A,B,C 🗳️
Compared with IKE main mode, which of the following advantages does IKE aggressive mode have ?
- A. IKE aggressive mode is more secure than main mode
- B. IKE aggressive mode can provide authentication
- C. adopted by IKE aggressive mode can provide a speed negotiation
- D. In the case that both parties in communication can know the IP address of the initiator in advance and need to use the pre-shared key, the aggressive mode can be used
Correct Answer: C,D 🗳️
Execute the command on the MSR router and output the following information:
Execute the command on the MSR router and output the following information:
Interface: GigabitEthernet0/1
Output queue: (Urgent queuing: Size/Length/Discards ) 0/100/0
Output queue: (Protocol queuing: Size/Length/Discards ) 0/500/0
Output queue: (Priorit queuing: PQL 1 Size/Length/Discards)
Top: 3/20/42878 Middle: 10/40/0 Normal: 60/60/259195 Bottom: 80/80/344297
Then the correct statement is
- A. PQ queue scheduling takes effect , Top traffic has packet loss
- B. PQ queue scheduling takes effect , no packet loss for Top traffic
- C. PQ queue scheduling does not take effect , and Middle traffic has no packet loss
- D. PQ queue scheduling does not take effect , Top traffic has no packet loss
- E. PQ queue scheduling takes effect , and Top traffic has no packet loss
- F. PQ queue scheduling does not take effect , Top traffic has packet loss
Correct Answer: A,C 🗳️
In the H.323 protocol, which of the following protocols is used to negotiate the capabilities of the two parties ?
- A. H.245
- B. H.225.0
- C. H.261
- D. H.263
Correct Answer: A 🗳️
Which of the following are measurement standards for voice quality ?
- A. MOS
- B. PQSM
- C. PSQM
- D. PESQ
Correct Answer: A,C,D 🗳️
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