GB0-371-ENU PDF Dumps Nov 10, 2021 Exam Questions – Valid GB0-371-ENU Dumps
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NEW QUESTION 36
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. 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
- C. All VLANs in the STP network share a spanning tree, and load sharing of different VLANs on Trunk links cannot be realized.
- D. When the topology changes frequently, some ports are often in Blocking state, which may cause long-term network interruption
Answer: A,B,C,D
NEW QUESTION 37
In the network connection as shown in the figure, SWA and SWB enable STP and Loopback-detection at the same time. Please confirm that the port status description of SWA and SWB is correct.
- A. STP detects the existence of a loop between G1/0/2 or G1/0/3 of SWB and blocks one of them
- B. G1/0/1 of SWA may be blocked by STP detecting the existence of a loop
- C. Between G1/0/2 and G1/0/3 of SWB, loopback-detection detects the existence of a loop and blocks one of them
Answer: A
NEW QUESTION 38
A loop in the LAN may cause it.
- A. Broadcast storm
- B. MAC address learning error
- C. Port duplex mode changes
- D. Port rate changes
Answer: A,B
NEW QUESTION 39
Regarding the basic concepts of MSTP, the correct statement is
- A. The role of the master port on all MSTIs is the same
- B. The master bridge is the regional root of IST
- C. Master port refers to the domain boundary port of the MST domain
- D. If the MST domain is regarded as a logical bridge, the Master port is the root port of the logical bridge
Answer: A,B,D
NEW QUESTION 40
Regarding the destination IP address of the IGMPV2 message and the group address (GroupAddress) field in the protocol message, is it correct?
- A. The destination IP address of the specific group query message is the same as the group address in the message
- B. The destination IP address of the member Report message is the same as the group address in the message
- C. The destination IP address of the member Leave message is the same as the group address in the message
- D. The destination IP address of the general group query message is 224.0.0.1, and the group address field in the message is 0.0.0.0
Answer: A,B,D
NEW QUESTION 41
Two routers are connected together via a LAN to form a VRRP backup group. If the router RTA receives the VRRP protocol message sent by the router RTB, the Priority field Auth Type field value of the message is 2, then
- A. Router RTB has enabled VRRP simple character authentication
- B. Router RTB is the owner of the VRRPIP address
- C. Router RTB enables VRRPV3 protocol
- D. Router RTB enables VRRPV2 protocol
Answer: B,D
NEW QUESTION 42
Which of the following descriptions about H3C switch static routing is correct (choose one or more)
- A. Layer 2 switches can be configured with static routes
- B. Layer 2 switches do not support routing and forwarding, so Layer 2 switches cannot be configured with static routes
- C. When the switch configures a static route, you can directly specify the outgoing interface without specifying the next hop
- D. Only Layer 3 switches can configure static routing
Answer: A
NEW QUESTION 43
In the network connection shown in the figure, SWA and SWB are Layer 3 switches, running STP+VRRP, and after the initial configuration is completed, SWA is the root of STP and Master of VRRP, and SWC is the Layer 2 switch connected to the access terminal , The following description about network link failure is correct
- A. After the link between SWA and SWC is interrupted, the VRRP Master will remain unchanged, but the SWC downstream terminal will not communicate with the gateway.
- B. When the link between SWA and SWC is interrupted, the topology of STP will change, and G1/0/2 of SWC will become Forwarding
- C. When the link between SWA and SWB is interrupted, the topology of STP will change, and both upstream ports of SWC will become Forwarding
- D. When the link between SWA and SWB is interrupted, the VRRP Master will switch, and SWB will become the new VRRP Master
Answer: C
NEW QUESTION 44
Which of the following descriptions about remote port mirroring are correct?
- A. The ProbeVLAN of remote port mirroring should prohibit MAC address learning
- B. The reflection port of remote port mirroring is essential
- C. Remote port mirroring must include the mirror source and destination switch
Answer: A,C
NEW QUESTION 45
Regarding the MSTP BPDU format, the correct statement is
- A. The MST configuration ID field is used to determine whether the switch belongs to the same MST region
- B. MSTI configuration message is used for MSTI spanning tree calculation
- C. IST calculation only requires the value in the MST proprietary field
- D. The number of MSTI configuration messages is determined by the number of VLANs
Answer: A,B
NEW QUESTION 46
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. Port E1/0/1 of SWA and SWB will send Proposal message to request to enter forwarding state
- B. When SWB receives the Proposal message sent by SWA, it will immediately reply to the Agreement message
- C. 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
- D. 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
Answer: A,C
NEW QUESTION 47
Regarding the three versions of the multicast group management protocol IGMPv1, IGMPV2, and IGMPv3, which is correct
- A. Only IGMPV3 has designed a specific source and group joining mechanism
- B. The election principles of the three versions of the querier are the same
- C. IGMPV2, IGMPV3 have specific group query messages
- D. IGMPv1 no leave message
- E. IGMPV3 cancels the membership report suppression mechanism
Answer: A,C,D,E
NEW QUESTION 48
Among the SNMPv1 messages, the messages sent by the Agent to the NMS include:
- A. GetResponse
- B. GetRequest
- C. GetNextRequest
- D. SetRequest
- E. Trap
Answer: A,E
NEW QUESTION 49
The customer's LAN switch SWA dual-uplink connection switch SWB and switch SWC, through SmartLink to ensure link reliability SWA switch has the following configuration:
[SWA-smlk-group1]smart-link flush enable control-vlan 10
The SWB switch has the following configuration?
[SWB-GigabitEthernet1/0/1]smart-link flush enable control-vlan 100
The SWC transfer machine has the following configuration:
[SWC-GigabitEthernet1/0/1]smart-link flush enable control-vlan 100
If the switch SWA switch SWB switch SWC interconnect interface allows all VLANs to pass, you can know from the above information
- A. Without changing the configuration, the SmartLink backup function of the SWA switch cannot be implemented
- B. No need to modify any configuration, SWA switch SmartLink backup function can be realized
- C. Change the receiving control vlan of SWB switch and SWC switch to 10, SWB switch and SWC switch refresh MAC and ARP through traffic
- D. Change the receiving control VLAN of SWB switch and SWC switch to 10, then the SmartLink backup function of SWA switch can be implemented normally
Answer: B,D
NEW QUESTION 50
In the switching network as shown in the figure, all three switches have only default VLAN1, the interconnection ports of the three switches are Trunk, and all VLANs are allowed to pass, and the three switches have the global and port GVRP function enabled. VLAN 10 is created on the switch SWA, VLAN 20 is created on the switch SWC, and the GVRP registration mode of the Ethernet1/0/1 port is set to Forbidden on the switch SWA, and the display vlan command is executed on the SWB to view the VLAN existing on VL^SWB Yes (choose one or more)
- A. VLAN 10
- B. VLAN1
- C. VLAN20
Answer: B,C
NEW QUESTION 51
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