Constructing H3C High-Performance Campus Networks (GB0-371-ENU) Free Practice Test

Question 1

In the PIM-DM network as shown in the figure, part of the unicast routing table of routers RT1 and RT2 is as follows
<RT1>display ip routing-table
Routing Tables: Public
Destination/MaskProtoPreCost NextHop Interface
10.1.1.0/30 Direct 0010.1.1.2Port1
10.1.1.1/32 Direct 0010.1.1.1Port1
10.1.1.2/32 Direct 00127.0.0.1 InLoopO
11.1.1.0/30 Direct 0011.1.1.1Port2
11.1.1.1/32 Direct 00127.0.0.1 InLoopO
12.1.1.0/30 Direct 0012.1.1.1Port3
12.1.1.1/32 Direct 00127.0.0.1 InLoopO
100.1.1.0/240SPF 10 1563 10.1.1.1 Portl
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
100.1.0.0/160SPF 10 311.1.1.2 Port2
<RT2>display ip routing-table
Routing Tables: Public
Destination/MaskProtoPreCost NextHop Interface
20.1.1.0/30 Direct 0020.1.1.2Port1
20.1.1.1/32 Direct 0020.1.1.1 Portl
20.1.1.2/32 Direct 00127.0.0.1 InLoopO
11.1.1.0/30 Direct 0011.1.1.2Port2
11.1.1.2/32 Direct 00127.0.0.1 InLoopO
22.1.1.0/30 Direct 0022.1.1.1Port3
22.1.1.1/32 Direct 00127.0.0.1 InLoopO
100.1.1.0/240SPF 10 1564 11.1.1.1 Port2
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
100.1.0.0/160SPF 10 220.1.1.1 Portl
Then, the (S, G) entry and exit interface lists of routers RT1 and RT2 are respectively

A. RT1 incoming interface list: Portl

B. RT2 incoming interface list: Portl

C. RT1 outgoing interface list: Port2, Port3

D. RT2 outgoing interface list: Port2, Port3

Correct Answer: A,C

Question 2

In the network shown in the figure, the corresponding configuration is completed on the switch SWA, and the switch SWA and each PC have learned the corresponding ARP table entry. When PCA accesses the PCB, an ICMP request message is sent, and the destination IP address of the message is

A. 10.1.1.2

B. 20.1.1.2

C. 10.1.1.1

D. 20.1.1.1

Correct Answer: B

Question 3

The following technologies belong to the three-layer multicast technology:

A. IGMP

B. IGMPSnooping

C. MVR

D. PIM

Correct Answer: A,D

Question 4

Which of the following protocols are multicast routing protocols running between routers and routers?

A. MOSPF

B. MLD

C. DVMRP

D. IGMPV2

E. PIM

Correct Answer: A,C,E

Question 5

In the network as shown in the figure, the corresponding configuration is completed on the switch SWA, and the switch SWA and each PC have learned the corresponding ARPPCA to access the PCB and send the ICMP request message, and the switch SWA forwards this MAC address to the PCB as

A. MAC10

B. MAC_A

C. 0000.0000.0000

D. MAC20

Correct Answer: D

Question 6

Regarding loop protection, the following statements are correct

A. Link congestion or single link may cause loops

B. After the loop protection function is activated, when the BPDU saved on the port ages, the loop protection takes effect

C. If the role of the root port changes, it will become the Discarding state, without forwarding packets, so that no loop will be formed in the network. The Discarding state will be maintained until the port receives the BPDU again and becomes the root port again.

D. In MSTP, this function is valid for root port, alternate port and backup port

Correct Answer: A,B,C,D

Question 7

Which of the following aspects should be considered for the security of the campus network?

A. Protect the physical circuit

B. Effective management of network equipment and network topology

C. Effective access control

D. Effectively identify legal and illegal users

Correct Answer: A,B,C,D

Question 8

As shown in the networking, there is no connection between SWA and SWB at the beginning, and RSTP is enabled for SWA and SWB. When the topology is stable, connect the port E1/0/1 of SWA and SWB. Assuming that SWA will become the new root bridge, the following The correct statement is

A. When SWB receives the Proposal message sent by SWA, it will start the synchronization process to block the old root port, designated port and edge port

B. SWB does not need to generate BPDUs by itself, and the content of the Agreement message in response is copied from the Proposal message sent by SWA

C. When SWB receives the Proposal message sent by SWA, it will immediately reply to the Agreement message

D. Port E1/0/1 of SWA and SWB will send Proposal message to request to enter forwarding state

Correct Answer: B,D

Question 9

The connection form of switch SWA, SWB and SWC is as follows:
SWA--SWB--SWC
The three switches are correctly configured with the GVRP protocol to advertise VLAN information to each other. If VLAN 2 is manually created on SWA, the following description is correct

A. After receiving the first Join message, SWB waits for the Holdtimer time to send the first Join message to SWC, and then waits for the Jointimer time to send the second Join message

B. After SWB receives the first Join message, Ma I sends the first Join message to SWC, and then waits for Jointime to send the second Join message

C. SWA immediately sends the first Join message to SWB, and then waits for the Jointimer time to send the second Join message

D. SWA waits for the Holdtimer time to send the first Join message to SWB, and then waits for the Jointime time to send the second Join message

Correct Answer: A,D

Question 10

In the switching network as shown in the figure, VLAN10 is set as Isolate-user-vlan on the switch SWA, VLAN2 and VLAN3 are the Secondary VLAN of VLAN 10; VLAN2? VLAN20 is created on the switch SWB, and VLAN20 is set as Isolate-user-vlan , VLAN4 is the Secondary VLAN of VLAN20. After setting the IP address of each device as shown in the figure, which of the following statements is correct (choose one or more)

A. When SWB accesses PCA, after the packet comes out of the GigabitEthem1/0/4 port of SWB, the VLAN Tag carried is VLAN20

B. SWB packets from GigabitEthernet1/0/3 of SWA come out of GigabitEthem1/0/1 without VLAN

C. The PCA packet enters from the GigabitEthe1/0/1 port of SWA, and the VLAN Tag carried after it exits the GigabitEthem1/0/3 port is VLAN 10

D. The PCA packet comes out of the GigabitEthem1/0/3 port of SWA and enters the GigabitEthem1/0/4 port of SWB without VLAN tag

Correct Answer: B

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H3C Constructing H3C High-Performance Campus Networks (GB0-371-ENU) Free Practice Test