Free GB0-372-ENU Questions for H3C GB0-372-ENU Exam

Question #1

The basic process of Layer 2 forwarding of Ethernet switches includes _____ (Multiple choice)

A. Search the MAC address table based on the destination MAC address. If no match is found, broadcast the message in the VLAN corresponding to the message.

B. If a match is found, but the port corresponding to the entry does not belong to the VLAN corresponding to the message, the frame is discarded;

C. Add or refresh the MAC address table entry based on the source MAC address and VLAN ID information of the received Ethernet frame;

D. If a match is found and the port corresponding to the entry belongs to the VLAN corresponding to the message, the message is forwarded to the port; however, if the port corresponding to the entry is the same as the port that received the Ethernet frame, the frame is discarded.

Discussion 0

Correct Answer: A,B,D Vote an answer

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Question #2

The mechanisms of the multicast group management protocol mainly include? (Multiple choice)

A. Router maintenance multicast group

B. Hosts joining and leaving multicast groups

C. Querier Election

D. Member Report Suppression Mechanism

Discussion 0

Correct Answer: A,B,C,D Vote an answer

Question #3

In the switching network shown in the figure, VLAN10 is set as Isolate -user- vlan on switch SWA, VLAN2 and VLAN3 are set as Secondary VLAN of VLAN 10; VLAN2 and VLAN20 are created on switch SWB, and VLAN20 is set as Isolate-user-vlan, and VLAN4 is set as Secondary VLAN of VLAN20. After setting the IP addresses of each device as shown in the figure, check the MAC address table on SWA, and you can judge that PCA belongs to _ ______.

A. VLAN 3

B. VLAN 2

C. VLAN 20

D. VLAN 10

E. VLAN 1

F. VLAN 4

Discussion 0

Correct Answer: B Vote an answer

Question #4

Which of the following statements about the BPDU format of MSTP is correct? (Multiple choice)

A. The timer value in the RSTBPDU will be used during the MSTI calculation process, and the timer parameters will not be carried in each MSTI configuration message

B. The MSTI specifies that the bridge priority field is 8 bytes long, including 2 bytes of bridge priority and
6 bytes of bridge MAC address.

C. If the switch is not configured with VLAN-to-instance mapping, the MSTBPDU will not carry any MSTI configuration information.

D. The MSTI specifies that the port priority field is 2 bytes long, including 1 byte of port priority and 1 byte of port number.

Discussion 0

Correct Answer: A,C Vote an answer

Question #5

The security of the campus network should take into account which of the following aspects?
(Multiple choice)

A. Effectively identify legitimate and illegitimate users

B. Effectively manage network devices and network topology

C. Effective access control

D. Protect physical lines

Discussion 0

Correct Answer: A,B,C,D Vote an answer

Question #6

As shown in the figure, SWA, SWB and SWC enable STP and SWB's MAC address is smaller than SWA's MAC address. If the topology converges, SWB's bridge priority is set to 0. Which of the following statements are correct? (Multiple choice)

A. By default, the topology will converge again after 30 seconds.

B. SWA will immediately determine that port E0/1 is the root port

C. After SWC receives the configuration BPDU sent by SWB, it will not update immediately, but will wait for the locally saved configuration BPDU to age before updating.

D. After the priority is adjusted, SWB will immediately send configuration BPDUs with itself as the root from ports E0/1 and E0/2.

Discussion 0

Correct Answer: A,B,D Vote an answer

Question #7

The network topology is shown in the figure. STP is enabled on SWA and SWD. Which of the following statements about the changes in the status of SWA and SWD ports are correct?

A. If the bridge priority of SWD is set to 0, the ports E0/1 and E0/2 of SWD will enter the Forwarding state after the Listening state and the Learning state.

B. SWD port E0/1 will change from a designated port to a root port in the Listening state.

C. If the bridge priority of SWD is set to 0, the role of port E0/1 of SWA will change from designated port to root port, and the port will maintain the Forwarding state during the change.

D. If the cost value of the SWD port E0/2 link is changed to 100, port E0/2 will immediately become the new root port and enter the Forwarding state.

Discussion 0

Correct Answer: B Vote an answer

Question #8

In a certain network, it is planned to use an S5560 switch as a RADIUS client and two iMC servers as RADIUS servers to complete the user's secure authentication access. Which of the following statements is correct? (Multiple choice)

A. By default, the IP address of the RADIUS server on the S5560 is 192.168.1.1

B. If the two iMC servers can adopt the master-slave mode, then the two RADIUS server IP addresses configured on the S5560 must be the same

C. Two iMC servers cannot work in master-slave mode

D. When configuring the S5560, ensure that the device can communicate with the iMC server.

Discussion 0

Correct Answer: A,D Vote an answer

Question #9

In SDN networks, which of the following problems exist in the traditional network security deployment method? (Multiple choice)

A. Data packets need to be classified multiple times, which is inefficient.

B. In Overlay networking, network devices need to detect inner messages through Overlay encapsulation

C. The coupling between network devices is large and the topology is seriously dependent.

D. Security equipment capabilities cannot be shared among multiple services

Discussion 0

Correct Answer: A,B,C Vote an answer

Question #10

The Ethernets port of switch SWA is configured as follows:
Interface Ethernet 1/0/1 port link-type trunk
Port trunk permit vlan 10 port trunk pvid vlan 20
Now we need to change the Ethernet 1/0/1 port of switch SWA to a Hybrid port, with PVID of VLAN 20, and do not tag the data frames of VLAN 20 when sending them, but tag the data frames of VLAN 10 when sending them. Which of the following configuration processes is correct?

A. None of the above is correct

B. [SWA-Ethernet1/0/1] port link-type hybrid

C. [SWA-Ethernet1/0/1] undoportlink-type
[SWA-Ethernet1/0/1] portlink-typeHybrid
[SWA-Ethernet1/0/1] port hybrid pvid vlan 20
[SWA-Ethernet1/0/1] port hybrid vlan 10 tagged

D. [SWA-Ethernet1/0/1] portlink-type access
[SWA-Ethernet1/0/1] port link-type hybrid
[SWA-Ethernet1/0/1] port hybrid pvid vlan 20
[SWA-Ethernet1/0/1] port hybrid vlan 10 tagged

E. [SWA-Ethernet1/0/1] port link-type access
[SWA-Ethernet1/0/1] port access vlan 20
[SWA-Ethernet1/0/1] port link-type hybrid
[SWA-Ethernet1/0/1] port hybrid vlan 10 tagged

Discussion 0

Correct Answer: E Vote an answer

Question #11

Regarding configuration BPDU and TCM BPDU, which of the following statements are correct?
(Multiple choice)

A. Configuration BPDU is usually received only from the root port, and TCNBPDU is received only from the designated port

B. Alternate ports will neither send configuration BPDUs nor TCN BPDUs.

C. Configuration BPDU is only sent from the designated port, and TCNBPDU is only sent from the root port.

D. Configuration BPDU is usually only sent periodically by the root bridge, while TCNBPDU may be sent by other bridges except the root bridge.

Discussion 0

Correct Answer: A,B,C,D Vote an answer

Question #12

What are the following methods used by RADIUS to ensure the correctness of messages exchanged between the RADIUS server and the RADIUS client? (Multiple choice)

A. RADIUS protocol uses TCP to reliably transmit messages

B. Each message sent by the RADIUS protocol has an independent and unique sequence number.

C. RADIUS protocol uses timers to manage message sending

D. The RADIUS protocol has a message retransmission mechanism

Discussion 0

Correct Answer: C,D Vote an answer

Question #13

The customer's LAN switch SWA is dual-uplinked to switch SWB and switch SWC, and link reliability is guaranteed by Smart Link. If the MAC address of switch SWA is 000f-e269-42d1, the MAC address of switch SWB is 000f-e269-42d2, and the MAC address of switch SWC is 000f-e269-42d3, what can we learn from the above information?

A. When the line connecting switch SWA to switch SWB fails, the destination mac of the Flush message sent by switch SWA is 000f-e269-42d3

B. None of the above answers are correct

C. When the line connecting switch SWA to switch SWB fails, the destination mac of the Flush message sent by switch SWA is 000f-e269-42d1

D. When the line connecting switch SWA to switch SWB fails, the destination mac of the Flush message sent by switch SWA is 000f-e269-42d2

Discussion 0

Correct Answer: B Vote an answer

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