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H3C GB0-371-ENU Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Campus Network Fundamentals | - Campus network architecture and design - Enterprise network models and deployment |
| High Availability Mechanisms | - RRPP, VRRP, IRF - Link Aggregation |
| Spanning Tree Protocols | - STP/RSTP/MSTP concepts and operations |
| IP Multicast | - Multicast basics and IGMP/Snooping - PIM-DM, PIM-SM |
| VLAN and Switching Technologies | - Switch port types and VLAN configurations - VLAN concepts and IEEE 802.1Q - Inter-VLAN routing principles |
| Security Basics in Campus Networks | - Port security and access control - AAA concepts (RADIUS/TACACS+) |
H3C Constructing H3C High-Performance Campus Networks Sample Questions:
1. In the network shown in the figure, the PIM SM protocol runs between RT1, RT2 and RT3, the RP is 1.1.1.1 RT3 is connected to the receiver, and IGMP is enabled on the corresponding interface to view the unicast routing table in RT3 as follows:
[RT3]display ip routing-table
Routing Tables: Public
Destinations: 10 Routes: 10
Destination/MaskProtoPreCost NextHop Interface
1.1.1.1/320SPF 10 1562 192.168.2.1 so/2/1
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
192.168.0.0/30Direct 00192.168.0.2 S0/2/0
192.168.0.1/32Direct 00192.168.0.1 S0/2/0
192.168.0.2/32Direct 00127.0.0.1 InLoopO
192.168.1.0/300SPF 10 3124 192.168.2.1 so/2/1
192.168.2.0/30Direct 00192.168.2.2 so/2/1
192.168.2.1/32Direct 00192.168.2.1 so/2/1
192.168.2.2/32Direct 00127.0.0.1 InLoopO
Then, when the receiver (Receiver) sends a group join request, which of the following routers have (*, G) entries
A) RT3
B) RT2
C) RT1
2. The following statements about the STP protocol are correct
A) The port in STP must pass two ForwardDelays from Blocking to Forwarding before data can be sent.
B) When the topology changes frequently, some ports are often in Blocking state, which may cause long-term network interruption
C) All VLANs in the STP network share a spanning tree, and load sharing of different VLANs on Trunk links cannot be realized.
D) If there are a large number of hosts in the STP network, frequent online and offline of the hosts will generate a large number of TCN BPDUs
3. Which statement is correct about the communication between switch VLANs?
A) After the two-layer switch divides VLANs, hosts in different VLANs can use routers to realize communication. The method is that the router has a physical interface and a physical connection to each VLAN.
B) After the Layer 2 switch is divided into VLANs, hosts in different VLANs can communicate with the router by using an interface to connect to the trunk port of the switch, and the router must support the 802.1 Q protocol
C) After the three-layer switch divides VLANs, hosts in different VLANs can communicate. The method is that the three-layer switch creates a virtual three-layer VLAN interface for each VLAN, and the VLAN interface needs to be configured with a corresponding IP address, which is used as the respective VLAN Gateway of the host
D) After the switch is divided into VLANs, only the hosts in the VLAN can communicate, and there is no way for the hosts between VLANs to communicate
4. For the following configuration commands:
[H3C] ntp-service refclock-master 127.127.1.1 6
Understanding, which is correct
A) This command can be successfully configured on all H3C series switches
B) The device successfully configured with this command can act as a clock server to provide external clock synchronization services
C) This command configures the local clock as the reference clock of the system
D) The device successfully configured with this command has a clock accuracy of 6 in stratum
5. The customer's LAN switch SWA is connected to SWB through Gigabitthem 2/0/1, and to SWC through GigabitEthernet 2/0/2, and the S\NA switch has the following configuration:
[SWA]smart-link group 1
[SWA-smlk-group1 ]protected-vlan reference-instance 0 to 32
[SWA-smlk-group1]port gigabitethernet 2/0/1 slave
[SWA-smlk-group1]port gigabitethernet 2/0/2 master
[SWA-smlk-group1 ]flush enable control-vlan 10
If the interconnection interfaces of switch SWA, switch SWB, and switch SWC allow all VLANs to pass, you can know from the above information
A) Under normal circumstances, SWA switch traffic will be uplinked through Gigabitethernet 2/0/2
B) If the Gigabitethernet 2/0/1 port fails, the SWA switch will broadcast flush packets in all VLANs
C) If the Gigabitethernet 2/0/2 port fails, the SWA switch will broadcast flush packets in all VLANs
D) Under normal circumstances, SWA switch traffic will be uplinked through Gigabitethernet 2/0/1
Solutions:
| Question # 1 Answer: A,B | Question # 2 Answer: A,B,C,D | Question # 3 Answer: A,B,C | Question # 4 Answer: B,C,D | Question # 5 Answer: A |

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