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

GB0-391

Exam Code: GB0-391

Exam Name: Constructing Secure optimized WANs v2.0

Updated: Jul 17, 2026

Q & A: 468 Questions and Answers

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H3C GB0-391 Exam Syllabus Topics:

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

H3C Constructing Secure optimized WANs v2.0 Sample Questions:

1. The following options belong to the co- side equipment is ____ .

A) machine top box
B) cable modem
C) DSLAM
D) access into the switch
E) access the server


2. The information displayed on the MSR router is as follows:
acl number 2000
rule 0 permit source 192.168.0.0 0.0.0.255
acl number 2002
rule 0 permit source 192.168.2.0 0.0.0.255
#
traffic classifier 2 operator and
if-match acl 2002
traffic classifier 1 operator and
if-match acl 2000
#
traffic behavior 2
queue af bandwidth pct 30
traffic behavior 1
queue ef bandwidth pct 30 cbs-ratio 25
#
qos polic test
classifier 1 behavior 1
classifier 2 behavior 2
#
interface GigabitEthernet0/1
port link-mode route
duplex full
speed 10
ip address 192.168.1.1 255.255.255.0
qos appl polic test outbound
When the traffic rate of the packets with the source addresses of 192.168.0.2 , 192.168.2.2 , and 192.168.3.2 are 4Mbps , 4Mbps , 6Mbps , and no other background traffic is forwarded from port G0/1_ .
Then the following statement is correct _____

A) The forwarding rate of packets with the source address of 192.168.0.2 is about 1.5Mbps
B) The forwarding rate of packets with the source address of 192.168.0.2 is about 3Mbps
C) The forwarding rate of packets with the source address of 192.168.0.2 is about 4Mbps
D) The forwarding rate of packets with the source address of 192.168.2.2 is about 3Mbps
E) The forwarding rate of packets with the source address of 192.168.2.2 is about 1.5Mbps
F) The forwarding rate of packets with the source address of 192.168.2.2 is about 4Mbps


3. The following about symmetric encryption algorithm is ______ .

A) DES
B) RAS
C) AES
D) RC4


4. When the link type of the ONU port is Trunk , its processing method for downstream messages is _____ .

A) only allowed without Tag packets to pass through, and the packets add the default VLAN of Tag
B) Only allow tagged messages to pass
C) for without receipt of the Tag message, add the default VLAN Tag ; for received with Tag packets forwarded directly
D) Only allow the packets with the default VLAN tag to pass and remove the tag


5. The following VPN technology, belonging to the second layer of VPN are ____ .( Choose one or more )

A) GRE VPN
B) VLL
C) IPSec VPN
D) VPLS


Solutions:

Question # 1
Answer: C,D,E
Question # 2
Answer: B,D
Question # 3
Answer: A,C,D
Question # 4
Answer: B
Question # 5
Answer: B,D

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