H3C : GB0-391 Questions & Answers
Updated: Aug 31, 2026
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H3C GB0-391 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Overview of Secure and Optimized WAN | 10% | - Key technologies for secure and optimized WAN - Remote network connection requirements |
| Topic 2: Secure VPN Technologies | 25% | - Data security fundamentals: encryption, integrity, PKI - IPSec VPN architecture, principle and configuration - SSL VPN architecture and application scenarios |
| Topic 3: BGP/MPLS VPN | 15% | - MPLS LDP protocol - MPLS basic concepts and label operation - BGP/MPLS VPN architecture and deployment |
| Topic 4: Traditional VPN Technologies | 20% | - L2TP VPN principle and configuration - VPN basic concepts and classification - GRE VPN principle and configuration |
| Topic 5: Broadband Access Technologies | 15% | - PPPoE principle and configuration - ADSL/ADSL2+ access technology - EPON/GPON technology and deployment |
| Topic 6: WAN Optimization and QoS | 15% | - Traffic policing and shaping - QoS models and service classification - Congestion management and avoidance |
H3C Constructing Secure optimized WANs v2.0 Sample Questions:
Question 1
The following information about the AH ( the Authentication Header , Authentication Header ) and the ESP ( Encapsulating Securlt Paload , the Encapsulating Security Payload ) described right there ______ .( Choose one or more )
A. two who can provide data integrity protection
B. two who can be used at the same time
C. two who can provide data origin authentication and optional anti-replay service
D. two who can provide confidentiality protection
Question 2
In the L2TP networking, configure the command to force the CHAP verification between the LNS and the client to be ____ .
A. In the L2TP-group view, configure the command mandator chap
B. In the L2TP-group view, configure the command mandator-chap
C. In the L2TP-group view, configure the authentication-mode mandator-chap command
D. In the global view, configure the command mandator-chap
Question 3
Use the command on the MSR router:
dis qos wfq interface GigabitEthernet 0/1
Get 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: ( Weighted Fair queuing: Size/Length/Discarcds ) 1023/1024/52719
Hashed b DSCP
Hashed queues 1/2/64 ( Active/Max active/Total )
Then the correct one in the following statement is ____ .
A. When the number of queues is active before 2
B. end port using the WFQ queues, the weight type DSCP
C. calendar history activated off the maximum number of queues is 2
D. end port using the WFQ queues, the weight of type IP priority
E. team column a maximum length of 1024 , the current data hold chamber, and packet loss
Question 4
Which of the following descriptions about H.323 terminals is correct is ____ .
A. & Poor pass H.323 terminal may not support fax functionality
B. P pass H.323 terminals may not support the video feature
C. even connected to the PSTN telephone network fax machine is a standard H.323 terminal equipment
D. P through PSTN telephone is a standard H.323 terminal
Question 5
Which statement about VoIP voice transmission is correct?
A. need to RTP to provide re-ordering mechanism
B. needs to RTP provides a time stamp mechanism
C. needed to TCP to provide reliability mechanisms
D. need to UDP provides multiplexing mechanism
Solutions:
| Question 1 Answer: A,B,C | Question 2 Answer: B | Question 3 Answer: B,C,E | Question 4 Answer: A,B | Question 5 Answer: A,B,D |
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