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Huawei 

GB0-320 

Exam Name: 

Constructing Enterprise-level Switching Networks 

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Question: 1. 

Multiple layer switching is realized according to the following information. 

A. Source MAC address and destination MAC address 

B. Source IP address and destination IP address 

C. source port number and destination port number 

D. IP packet protocol number 

Answer: ABCD 

2. 

Question: 

The Ethernet link layer is divided into two sub-layers by IEEE802.3. The two sub-layers are: 

A. Physical sub-layer 

B. MAC sub-layer 

C. LLC sub-layer 

D. IP sub-layer 

Answer: BC 

3. 

Question: 

Which of the following Ethernet standards support speed rate auto-negotiation? 

A. 10BASE-T 

B. 100BASE-TX 

C. 1000BASE-LX 

D. 1000BASE-SX 

Answer: AB 

4 

Question: 

Which of the following descriptions of port aggregation technology are true? 

A. This technology is applied in the connection between switch and switch 

B. This technology is applied in the connection between switch and router 

C. The technology is not applied in the connection between the high-speed server 

D. This technology is not applied in the connection between the switch and the high-speed server 

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Answer: AB 

5. 

Question: 

If setting the working rate of Quidway S3526 Ethernet port 10 only to be 100Mbit/s, which of the 

following commands should be used? 

A. speed 10 

B. speed 100 

C. speed auto 

D. speed full 

Answer: B 

6. 

Question: 

Compared with the common Ethernet packet, which of the following items are newly added in VLAN 

packet ruled in IEEE802.1Q protocol? 

A. TPID (Tag Protocol Identifier) 

B. Priority 

C. Canonical Format Indicator (CFI) 

D. VLAN Identifier (VLAN ID) 

Answer: ABCD 

7. 

Question: 

The GARP itself is only a protocol specification but not an entity existing in the switch. The application 

entity that observes the GARP protocol is called the GARP application. 

A. True 

B. False 

Answer: A 

8. 

Question: 

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As shown in the following figure, the corresponding links of Port 1 ~ Port 4 are the trunk links allowing 

all the VLANs to pass and the GVRP protocol is activated. The GVRP registration mode of Port 4-switch 

3 is set to be Forbidden and the GVRP registration modes of the ports on other switches are set to be 

Normal. VLAN5 and VLAN6 are configured on the switch 1 and VLAN 6 and VLAN 7 are configured on 

the switch 3. The following are the VLAN configuration situations of the ports of the switch except the 

default VLAN. Which of the items are true? 

A. VLAN 5 and VLAN 6 are configured over port 1. 

B. VLAN 5~VLAN 6 are configured over port 2. 

C. VLAN 6 and VLAN 7 are configured over port 3. 

D. VLAN 6 and VLAN 7 are configured over port 4. 

Answer: AB 

9. 

Question: 

The layer 2 switch supporting VLAN has solved the following problem: 

A. Security 

B. High efficiency 

C. Flexible management 

D. All the above items are false. 

Answer: ABC 

10. 

Question: 

Which of the following descriptions of the transparent bridge is false?( ) 

A. The transparent bridge can learn the MAC address by itselB. 

B. The transparent bridge can expand LAN. 

C. The transparent bridge needs to modify the IP packet first, and then forward iA. 

D. The transparent bridge is the equipment working on the layer 2. 

Answer: C 

11. 

Question: 

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Through which of the following packets is the BPDU packet transmitted? 

A. IP packet 

B. TCP packet 

C. Ethernet frame 

D. UDP frame 

Answer: C 

12. 

Question: 

Which of the following descriptions of the Blocking status (Discarding status) of the spanning tree is 

false? 

A. In Blocking status, BPDU packet can be received. 

B. In Blocking status, no packet can be received. 

C. In Blocking status, no MAC address can be learned. 

D. In Blocking status, no data packet can be forwarded. 

Answer: B 

13. 

Question: 

Which of the following descriptions of the port status transition under RSTP is false? 

A. In the case that there are redundant paths leading to the root, if the original path is faulty, only 

several milliseconds is needed for finding the path fault and restoring the link connectivity. 

B. In the case of point-to-point link, only one handshake is needed for the designated port to be 

transited to the Forwarding status. And the delay period is only several milliseconds. 

C. For the bridging network running RSTP, the stable period of topology must be more than 30 seconds 

(Twice the period of ForwardDelay) 

D. The port directly connecting to the PC can be rapidly transited to the Forwarding status, but the 

subscribers need to configure it to be the edge port firsA. 

Answer: C 

14. 

Question: 

The values of the bridge priorities are not consecutive, and they are based on a certain step length, 

which is the step length? 

A. 16 

B. 100 

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C. 1024 

D. 4096 

Answer: D 

15. 

Question: 

When displaying the STP information via the display command, which of the following information 

related to the port is not include? 

A. The switch priority 

B. HelloTime, MaxAge and ForwardDelay configured to the switch 

C. Root bridge ID 

D. Location information of the switch in the spanning tree 

Answer: D 

16. 

Question: 

To which of the following MAC multicast addresses should the multicast IP address 224.215.155.155 

be mapped? 

A. 01-00-5e-70-9b-9b 

B. 01-00-5e-40-9b-9b 

C. 01-00-5e-57-9b-9b 

D. 01-00-5e-30-9b-9b 

Answer: C 

17. 

Question: 

Which of the following descriptions of IGMP functions is true? 

A. It is for the router to notify the layer 2 switch the host joining the multicasA. 

B. Enhance IP packet forwarding performance 

C. Maintain VLAN dynamically 

D. Maintain the multicast group information between the host and the router. 

Answer: D 

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18. 


Question: 

Through which of the following messages does PIM-SM refresh its multicast distribution tree? 

A. Hello message 

B. Registration message 

C. Join/pruning message 

D. C-RP-Adv message 

Answer: C 

19. 

Question: 

For the switch, to which of the following items can the interface ACL perform the packet filtering?( ) 

A. Source IP address and its subnet mask 

B. Destination IP address and its subnet mask 

C. Name of the designated interface 

D. Ethernet encapsulation type of the data packet 

Answer: C 

20 

Question: 

LAN is a high-speed error tolerance data network covering a relatively small geographical scope. 

Except the covering scope, the differences between LAN and WAN lie in network ownership and data 

rate. 

A. True 

B. False 

Answer: A 

21. 

Question: 

The devices that are applied in LAN are:( ) 

A. Access Server 

B. MODEM 

C. Hub 

D. Ethernet switch 

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Answer: CD 

22. 

Question: 

The Ethernet at the early stage is based on the medium of ( ). Only after the appearance of the 

Ethernet based on ( ), Ethernet is developed to be the LAN standard we usually talk abouA. 

A. Coaxial cable; Twisted pair 

B. Twisted pair; Optical cable 

C. Coaxial cable; Optical cable 

D. Twisted pair; Coaxial cable 

Answer: A 

23. 

Question: 

Which of the following descriptions of bridge are true? 

A. The traditional Ethernet tries to segment the host by the bridge to reduce the conflicA. 

B. In the large-scale network, HUB is more likely to be the bottleneck for the network transmission 

than the switch. 

C. Bridge cannot provide a solution to the broadcast flooding. 

D. Bridge can provide a solution to the broadcast flooding. 

Answer: ABC 

24. 

Question: 

Which of the following descriptions of the switching Ethernet are true? 

A. All the hosts in the network are physically unconnected. When the host needs to communicate, it 

is connected to the peer host via the switch equipment and disconnected after the communication. 

B. The switching equipment includes: switching concentrator and switch. 

C. The networking through the switching equipment is of star structure physically and bus structure 

logically. 

D. All the above descriptions are false. 

Answer: AB 

Question: 

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25 

Compared with hub, which of the following descriptions of Ethernet switch are true? 

A. The Ethernet switch extends the bandwidth of the network. 

B. The Ethernet switch separates the network collision domain and confines the network collision to 

the minimum 

C. As the more intelligent switching equipment, the Ethernet switch can provide more functions 

required by users such as priority, virtual network and remote detection. 

D. The Ethernet switch has completely solved the problem of broadcast flooding. 

Answer: ABC 

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