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H3C GB0-191-ENU : Constructing Small - and Medium - Sized Enterprise Network

GB0-191-ENU

Exam Code: GB0-191-ENU

Exam Name: Constructing Small - and Medium - Sized Enterprise Network

Updated: Sep 12, 2026

Q & A: 434 Questions and Answers

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H3C GB0-191-ENU Exam Syllabus Topics:

SectionObjectives
Topic 1: Switching Technologies- Loop Prevention
  • 1. RSTP
  • 2. STP
- LAN Switching
  • 1. MAC Address Learning
  • 2. VLAN Configuration
  • 3. Trunk Links
  • 4. Link Aggregation
Topic 2: Network Management and Maintenance- Troubleshooting
  • 1. Switching Troubleshooting
  • 2. Routing Troubleshooting
  • 3. Network Connectivity Verification
- Device Management
  • 1. Configuration Backup and Restore
  • 2. CLI Operations
  • 3. System Maintenance
Topic 3: Network Security- Switch Security
  • 1. ARP Protection
  • 2. Port Security
- Access Control
  • 1. ACL Configuration
  • 2. Basic Security Policies
Topic 4: IPv6 Technologies- IPv6 Fundamentals
  • 1. IPv6 Addressing
  • 2. IPv6 Routing Basics
Topic 5: WAN Technologies- Point-to-Point Connections
  • 1. PPP
  • 2. HDLC
Topic 6: Network Services- Address and Name Services
  • 1. DNS Fundamentals
  • 2. DHCP
- Address Translation
  • 1. NAT
  • 2. PAT
Topic 7: Routing Technologies- IP Routing Basics
  • 1. Static Routing
  • 2. Default Routing
- Dynamic Routing
  • 1. RIP
  • 2. OSPF Fundamentals
Topic 8: Network Fundamentals- OSI Reference Model
  • 1. TCP/IP Protocol Suite
  • 2. Ethernet Fundamentals
  • 3. IPv4 Addressing
  • 4. Subnetting

H3C Constructing Small - and Medium - Sized Enterprise Network Sample Questions:

Question #1
The two WAN interfaces S1/0 and S1/1 of the router MSR-1 are connected to the routers MSR-2 and MSR-3 respectively.
At the same time, the Ethernet port of MSR-1 is connected to MSR-4. All four routers have run the RIP protocol and completed routing learning correctly. All routers have started all the features of RIP to prevent loops. At this time, it is found that the MSR -2 The network 192.168.0.0 fails, then ______ after a certain period of time. (Multiple choice)

A. The 192.168.0.0 routing entries on all routers will enter the suppressed state
B. If the network 192.168.0.0 returns to normal, MSR-2 will immediately send routing update information
C. The cost of 192.168.0.0 routing items on all routers is set to the maximum value
D. If the network 192.168.0.0 returns to normal, MSR-2 will wait until the update cycle time point to send update information to other routers


Question #2
The client router's interface GigabitEthernet0/0 is connected to the LAN host HostA, and its IP address is 192.168.0.2/24;
The interface Serial6/0 interface is connected to the remote end and is currently operating normally. The ACL configuration is now added as follows:
firewall enable
firewall default permit
acl number 3003
rule 0 permit tcp
rule 5 permit icmp
acl number 2003
rule 0 deny source 192.168.0.0 0.0.0.255
interface GigabitEthernet0/0
firewall packet-filter 3003 inbound
firewall packet-filter 2003 outbound
ip address 192.168.0.1 255.255.255.0
interface Serial6/0
link-protocol ppp
ip address 6.6.6.2 255.255.255.0
Assuming other related configurations are correct, then ______. (Multiple choice)

A. HostA cannot ping the two interface addresses on the router
B. HostA can Telnet to the router
C. HostA cannot ping 192.168.0.1, but it can ping 6.6.6.2
D. HostA can't ping 6.6.6.2, but can ping 192.168.0.1


Question #3
The following statement about the functions of each layer of the OSI reference model is correct. ______. (Multiple choice)

A. The network layer decides the best route for transmitting the message. The key issue is to determine how the data packet is routed from the source to the destination.
B. The basic function of the transport layer is to establish and maintain virtual circuits, perform error checking and flow control.
C. The application layer is responsible for providing network services for applications.
D. The session layer is responsible for data format processing, data encryption, etc.
E. The physical layer refers to the original bit stream transmitted on the communication channel (Channel), which defines the mechanical and electrical functions and procedures required for data transmission.


Question #4
In the switching network shown in the figure, all switches have enabled the STP protocol.

SWA was selected as the root bridge. According to the information in the figure, the _______ port should be set to the Blocking state. (Multiple choice)

A. P1 of SWD
B. P1 of SWC
C. P2 of SWC
D. Insufficient information, unable to judge
E. P2 of SWD


Question #5
The following description of the star network topology is correct ______. (Multiple choice)

A. Star topology is easy to maintain
B. Since the star topology network shares the bus bandwidth, when the network load is too heavy, it will cause performance degradation
C. The star topology has high robustness, and there is no single point of failure. Central node failure
D. In the star topology, the failure of one line does not affect the computer communication under other lines


Solutions:

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

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