2021 Latest 100% Exam Passing Ratio - GB0-371-ENU Dumps PDF
Pass Exam With Full Sureness - GB0-371-ENU Dumps with 337 Questions
NEW QUESTION 97
The following statements about PIM SM are correct:
- A. The RP will forward multicast traffic downstream only after receiving the data forwarded by the multicast source.
- B. When receiving a registration message from a multicast source, the RP sends a join message to the multicast source, and generates an (S, G) entry when it receives traffic from the multicast source normally multicast forwarding
- C. Before the multicast traffic is normally forwarded from the RP to the multicast receiver, the routers along the way have established (*, G) entries
- D. When a multicast source initially sends traffic, an (S, G) entry will be formed on the DR connected to it
Answer: C,D
NEW QUESTION 98
Which statement is correct about the communication between switch VLANs?
- A. 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
- 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 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.
- 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
Answer: A,B,C
NEW QUESTION 99
In the switching network as shown in the figure, VLAN10 is set as Super VLAN on switch SWA, VLAN2 and VLAN3 are Sub VLAN of VLAN10, port Ethernet1/0/3 is Trunk port, PVID is VLAN1, allowing all VLANs to pass through; Create VLAN2~VLAN20 on SWB, port Ethernet1/0/4 as Trunk port, PVID is VLAN1, allow all VLANs by setting the IP address of each device as shown in the figure, you can judge_
- A. PCA can communicate with PCB
- B. PCA can communicate with PCC
- C. PCA can communicate with SWB
- D. PCA can communicate with SWA
- E. None of the above answers
Answer: B,D
NEW QUESTION 100
Regarding TC protection, the following statements are correct
- A. TC protection is configured in the system view
- B. After the switch receives the TC-BPDU message, it will delete the MAC address table entry
- C. After the TC protection function is enabled, within 10 seconds after receiving the TC-BPDU message, the device allows the number of address table item deletion operations immediately after receiving the TC-BPDU message can be controlled by the user
- D. The system monitors whether the number of TC-BPDU packets received during this time period is greater than the threshold. If it is greater than the threshold, the device will delete the address table entry again after the time expires, so as to avoid frequent deletion and forwarding Address table entry
Answer: A,B,C,D
NEW QUESTION 101
Regarding the configuration of bridge priority in spanning tree, the following statements are correct.
- A. The smaller the priority value, the lower the priority of the bridge
- B. The step size of bridge priority is 4096
- C. If the switch is not configured with the priority of the bridge, the default value is 32768
- D. The priority of the bridge is 16 bits in total, and the value range is 0-65535
Answer: B,C
NEW QUESTION 102
The customer LAN switches SWA, SWB, and SWC form the RRPP ring main ring 1, and the switch SWA has the following configuration information:
[SWA] rrpp domain 1
[SWA-rrpp-domain1] control-vlan 4092
k The above information can be known
- A. All ports connected to the RRPP ring on the SWA, SWB, and SWCRRPP rings of the switch need to be added to VLAN 4092
- B. All ports on the switches SWA, SWB, and SWC need to be added to VLAN4092
- C. The main ring control VLAN on the switch SWB and SWC can be inconsistent with SWA
- D. In order to facilitate network management, an IP management address can be configured on VLAN4092
Answer: A
NEW QUESTION 103
The figure shows the networking application of RRPP. The customer LAN switches SWA, SWB, SWC, and SWD form RRPP ring main ring 1, the switches SWB, SWC and SWE form sub-ring 2, and switches SWB, sWC and sWF form sub-ring 3. If The switch SWE is the master node of sub-ring 2, and SWF is the master node of sub-ring 3. It can be learned from the above information
- A. Cannot add sub-ring 2 and sub-ring 3 to the same ring group
- B. If sub-ring 2 and sub-ring 3 are added to the same ring group, the edge node and assistant edge node of sub-ring 2 and sub-ring 3 in the ring group can be different
- C. If sub-ring 2 and sub-ring 3 are added to the same ring group, the main ring link corresponding to the edge node and assistant edge node of sub-ring 2 and sub-ring 3 in the ring group should be the same
- D. If sub-ring 2 and sub-ring 3 are added to the same ring group, the ring group should be configured on the switch SWB, SWC, SWE, SWF, and the configuration should be consistent
Answer: C
NEW QUESTION 104
Regarding the comparison of unicast, multicast and broadcast, there are correct
- A. Compared with unicast, multicast can reduce link load
- B. Compared with broadcast, multicast can reduce the burden of the source
- C. Compared with broadcast, multicast can improve link utilization
- D. Compared with unicast, multicast can reduce the burden of the source
Answer: A,C,D
NEW QUESTION 105
In the switching network as shown in the figure, all three switches only have the default VLAN 1, 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 SVVA, VLAN 20 is created on the switch SWC, check the status information of each Trunk port on the three switches, the correct one is displayed below (choose one or more)
- A. [SWB]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
- B. [SWA]display interface Ethernet 1/0/1 Ethernetl/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
- C. [SWB]display interface Ethernet 1/0/2 Ethernet1/0/2 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
- D. [SWC]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q
Answer: A
NEW QUESTION 106
After executing the display interface Ethernet 1/0/1 command on the switch SWA, the output information is as follows:
[SWA]display interface Ethernet 1/0/1
Ethernet1/0/1 current state: UP
PVID: 10
Mdi type: auto
Link delay is 0(sec)
Port link-type: trunk
VLAN passing: 1 (default vlan), 10
VLAN permitted: 1 (default vlan), 2-4094
Trunk port encapsulation: IEEE 802.1q
Port priority: 0
It can be judged from the above output
- A. Data frames with VLAN1 tags will not be discarded when they enter Ethernet1/0/1
- B. Data frames with VLAN10 tags will not be stripped off when Ethernet1/0/1
- C. Data frames without VLAN tags will be tagged with VLAN10 when they enter the port Ethernet1/0/1
- D. Port Ethernet1/0 is a Trunk port, which only allows data frames of VLAN 10 to pass through
Answer: A,C
NEW QUESTION 107
What is correct about the STP root bridge?
- A. There is no root port on the root bridge
- B. The root bridge refers to the bridge with the highest priority on a PhysicalSegment
- C. Alternate ports may exist on the root bridge
- D. All ports on the root bridge are fixed ports
Answer: A,C
NEW QUESTION 108
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 109
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 110
Since the expansion of the network scale may lead to more and more arduous management tasks, in the initial stage of network construction, network administrators hope to adopt various technologies to reduce the workload of network management. The most common method is to simplify the network structure and unify Network equipment and other methods Which of the following technologies are technologies that simplify the network structure
- A. SNMP protocol
- B. Cluster technology
- C. Stacking technology
- D. 10 Gigabit Ethernet
Answer: B,C
NEW QUESTION 111
The following statements about multicast routing protocols are correct:
- A. In dense mode, the multicast data stream is flooded from the multicast source to every corner of the network by pushing, and the multicast receiver passively receives multicast packets
- B. In sparse mode, the multicast data stream is sent from the multicast source to the multicast receiver in a pull mode, and the multicast receiver actively sends and receives requests
- C. Intra-domain multicast routing protocols include: MSDP, DVMRP, MOSPF, PIM
- D. The multicast routing protocol has two modes: dense and sparse
Answer: A,B,D
NEW QUESTION 112
As shown in the networking, initially Link 2 is not connected, and STP is not enabled on the switches, and the PCB can send data to PCA. If Link 1 fails at this time, the maintenance staff connects Link 2 to the PCA. The restoration process of the transmission service is correct (assuming that the PCA will not actively send data)
- A. SWB's E0/1 interface can immediately enter the forwarding state
- B. It will take 300 seconds for the business from PCB to PCA to resume by default
- C. SWC can immediately forward the data from PCB to PCA to SWB
- D. It will take 30 seconds for the business from PCB to PCA to resume by default
Answer: A,B
NEW QUESTION 113
As shown in the network, the switches all run RSTP. Initially, SWA, SWB and SWC are interconnected through links 1, 2, and 3. When the following changes occur in the network connection, the correct statement is:
- A. When the link between SWB and SWC is down, both SWB and SWC will send RST BPDU with TC set
- B. As shown in the figure, when SWB is connected to another switch SWD running RSTP, SWB will send RSTBPDU with TC set
- C. As shown in the figure, when SWB is connected to another switch running RSTP, SWD will send RSTBPDU with TC set.
- D. When SWC edge port E0/1 is connected to a PC, SWC will send RST BPDU with TC set
Answer: B
NEW QUESTION 114
As the network management director of a certain company, Mr. Wang adheres to the following network technology and network equipment selection and application principles in network construction. As a network engineer, you think the selection and application of those technologies are not good for network management.
- A. All devices are required to support standard topology discovery protocol
- B. The network equipment is provided by at least three different manufacturers
- C. The routing protocol must choose a standard dynamic routing protocol
- D. Each manufacturer's network equipment must use its own network management system for management
Answer: B,D
NEW QUESTION 115
The SSH protocol is widely used as a secure remote login protocol. The description of SSH is correct.
- A. SSH can also provide a secure transmission channel for FTP
- B. SSH is SecureShell, which can use DES authentication to ensure data security
- C. SSH uses TCP port 22 to transmit data and port 23 to establish a connection
- D. SSH uses additional encryption technology to ensure login security
Answer: A,B,D
NEW QUESTION 116
What kind of request operation does SNMP v2c add to the SNMP v1 protocol?
- A. GetBulkRequest
- B. GetRequest
- C. GetNextRequest
- D. SetRequest
Answer: A
NEW QUESTION 117
Regarding the STP port status, the following statements are correct
- A. When the port is in the Learning state, it starts to learn the MAC address, but does not forward data
- B. When the port is in the Listening state, it will receive configuration BPDUs and perform calculations, but not send configuration BPDUs
- C. When the port is in Listening state and Learning state, if the port role is changed to Alternate port, the port state will directly change to Blocking
- D. No matter what role the port finally determines, the time spent in the Listening state and the Learning state is a ForwardDelay duration
Answer: A,C
NEW QUESTION 118
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