GB0-372-ENUのPDF問題集で2024年12月11日最近更新された問題
GB0-372-ENU試験問題有効なGB0-372-ENU問題集PDF
質問 # 220
In the switching network shown in the figure, VLAN10 is set as Isolate-user-vlan on switch SWA, and VLAN2 and VLAN3 are set as Secondary VLAN of VLAN 10; VLAN4 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, the local proxy ARP function is enabled on SWA and SWB. Initially, the switch and PC did not learn their corresponding ARP entries. When PCA pings PCB, PCA will send an ARP request. After PCB receives the ARP request message, it sends a destination MAC response with the destination MAC address as?
- A. 0011.1111.1111
- B. FFFF.FFFF.FFFF
- C. 00E0.FC00.0010
- D. 00E0.FC00.0020
正解：D
質問 # 221
In the network shown in the figure, the PIMSM protocol is running between RT1, RT2 and RT3, the RP is 1.1.1.1, there is a receiver connected to RT3, and IGMP is enabled on the corresponding interface.
The unicast routing table in RT3 is as follows:
[RT3] display ip routing-table Routing Tables: Public Destinations: 10 Routes: 10 Destination/MaskProtoPreCost NextHop Interface
1.1.1.1/32 OSPF 10 1562 192.168.0.1 S0/2/0
127.0.0.0/8 Direct 00 127.0.0.1 In Loop 0
127.0.0.1/32 Direct 00 127.0.0.1 In Loop 0
192.168.0.0/30 Direct 00 192.168.0.2 S0/2/0
192.168.0.1/32 Direct 00 192.168.0.1 S0/2/0
192.168.0.2/32 Direct 00127.0.0.1 In Loop 0
192.168.1.0/30 OSPF 10 3 124 192.168.2.1 s0/2/1
192.168.2.0/30 Direct 00 192.168.2.2 so/2/1
192.168.2.1/32 Direct 00 192.168.2.1 so/2/1
192.168.2.2/32 Direct 00 127.0.0.1 In Loop 0
Then, when the receiver sends a group join request, which of the following routers have (*, G) entries?
(Multiple choice)
- A. RT1
- B. RT3
- C. RT2
正解：A、B
質問 # 222
How does Overlay technology solve the problems and challenges encountered in the development of cloud computing? (Multiple choice)
- A. For the Underlay network, the data packets of the Overlay network are just forwarding of the tunnel endpoint address, so the MAC address specification requirements of the Underlay network (especially the access switch) are greatly reduced.
- B. Overlay expands the number of isolation identification bits. Compared with using VLAN to achieve network isolation, the isolation capability of Overlay network is greatly improved.
- C. Overlay network only needs edge devices to support Overlay, and the middle Underlay network can use traditional devices, which can protect existing investments and facilitate technology implementation.
- D. Overlay encapsulates the Layer 2 message in the IP message, allowing the virtual machine to achieve Layer 2 intercommunication across the Layer 3 network
正解：A、B、C、D
質問 # 223
Which of the following statements about STP bridge ID is correct?
- A. The MAC addresses of SWA and SWB are 00-E0-FC-00-00-11 and 00-E0-FC-11-00-11 respectively, and their priorities are 32768 and 4096, when SWA and SWB are connected in a ring network and the spanning tree protocol is enabled, SWA will become the root bridge.
- B. The bridge with the smallest bridge ID in the network will eventually become the root bridge after STP calculation.
- C. The bridge priority field is 2 bytes long, so the bridge priority value range is 0-65535
- D. The bridge ID consists of the bridge MAC address and the priority field. When comparing bridge IDs, the MAC address is compared first, and the one with the smaller MAC address value is preferred.
正解：B
質問 # 224
Which of the following statements about the STP protocol is correct? (Multiple choice)
- A. When the topology changes frequently, some ports will often be in the Blocking state, which may cause long-term network interruption.
- B. If there are a large number of hosts in the STP network, the frequent online and offline of the hosts will generate a large number of TCN BPDUs
- C. All VLANs in an STP network share a spanning tree, and load balancing between different VLANs on the Trunk link cannot be achieved.
- D. A port in STP must go through two ForwardDelays from Blocking to Forwarding before it can send data.
正解：A、B、C、D
質問 # 225
In the basic AAA implementation structure shown in the figure, if the server group is configured to provide AAA security services to a certain service of the host, which of the following security functions can be implemented and completed by the AAA server group? (Multiple choice)
- A. Verify access username and password
- B. Send access level to access users
- C. Distribute directories that access users can access
- D. Record the access traffic and duration
正解：A、B、C、D
質問 # 226
Which of the following statements about multicast VLAN is correct? (Multiple choice)
- A. The VLAN to which the host belongs needs to be configured as a sub-VLAN of the multicast VLAN
- B. Multicast VLAN saves bandwidth and reduces the burden on Layer 3 devices.
- C. The IGMP-Snooping function must be enabled on the sub-VLANs of the multicast VLAN at the same time
- D. Multicast VLAN needs to enable IGMP-Snooping function
正解：A、B、D
質問 # 227
As shown in the figure, initially link 2 is not connected, and the switches do not enable STP. PCB can send data to PCA. If link 1 fails at this time, the maintenance personnel connect link 2. Which of the following is the correct statement about the recovery process of the data transmission service from PCB to PCA is (assuming that PCA will not actively send data) (Multiple choice)
- A. SWC can immediately forward the data from PCB to PCA to SWB
- B. The default time for PCB to PCA service recovery is 300 seconds
- C. The default time for PCB to PCA service recovery is 30 seconds
- D. SWB's EO/1 interface can immediately enter the forwarding state
正解：B、D
質問 # 228
After executing the display interface Ethernet 1/0/1 command on the switch SWA, the output information is as follows: From the above output, what can be inferred from the above output?
[SWA] display interface Ethernet 1/0/2
Ethernet1/0/2 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
- A. The data frame with VLAN10 tag will not be stripped when it leaves port Ethernet 1/0/1.
- B. Data frames with VLAN1 tags will be discarded when they enter port Ethernet 1/0/1
- C. The data frame with VLAN10 tag is discarded when it enters port Ethernet 1/0/1
- D. The data frame with VLAN10 tag will be stripped of the tag when it leaves port Ethernet 1/0/1
正解：D
質問 # 229
Which of the following descriptions of the secure managed service gateway group are correct?
(Multiple choice)
- A. The virtual resource management network is used for traffic between FW/LB and tenant virtual machines
- B. Secure intranet is used for traffic between FW and LB
- C. The secure extranet is used for traffic between FW and gateway
- D. The tenant bearer network is used for traffic between FW/LB and VCFC
正解：A、B、C
質問 # 230
The customer LAN switches SWA, SWB, and SWC form the RRPP ring main ring 1. The switch SWB has the following configuration information:
[SWB] rrpp domain 1
[SWB-rrpp-domain1] ring 1 node-mode transit primary-port gigabitethernet 2/0/1 secondary-port gigabitethernet 2/0/2 level 0 If switch SWA is the master node of primary ring 1, and if switch SWB port GigabitEthem2/0/1 fails, what can we learn from the above information? (Multiple choice)
- A. SWA will send a Link-Down message to notify all nodes
- B. If switch SWB finds that port GigabitEthernet 2/0/1 is Up again, it will immediately unblock the port.
- C. The switch SWA immediately switches to the Failed state and releases the secondary port
- D. The switch SWA will send a Common-Flush message to notify all transmission nodes
正解：C、D
質問 # 231
In a large LAN, what functional layers is the network divided into? (Multiple choice)
- A. Access layer
- B. Convergence Layer
- C. Management
- D. Core layer
正解：A、B、D
質問 # 232
Under EVPN networking, what are the rules for automatic generation of RT and RD? (Multiple choice)
- A. The automatically generated RT value is "BGP AS: VXLAN ID + N, where N is an integer starting from
1. If there is a duplicate RD, then N + 1 is added until an unused RD is found. - B. The automatically generated RD value is "BGP AS: VXLANID"
- C. The automatically generated RD value is "N:VXLANID", where N is an integer starting from 1. If there is a duplicate RD, N+1 is added until an unused RD is found.
- D. The automatically generated RT value is "BGP AS: VXLANID"
正解：C、D
質問 # 233
As the basis for SNMP protocol implementation, MIB must be stored and accessed with correct rules.
Which of the following descriptions about storage and access to MIB is incorrect? (Multiple choice)
- A. The network management workstation can only access objects stored in the MIB on the network management workstation.
- B. MIB is stored in SM tree structure
- C. MIB is a collection of managed objects and is stored on the network management workstation
- D. The network management workstation can only access objects stored in the MIB on the managed device.
- E. MIB is a collection of managed objects and is stored on managed devices
正解：A、B、C
質問 # 234
Regarding the priority marking of IP packets, which of the following is correct? (Multiple choice)
- A. DSCP defines four types of network processes, among which the accelerated forwarding EF class is divided into four subclasses EF1/2/3/4
- B. 802.1P priority is divided into 4 levels from 0 to 3
- C. The TOS field of the current IP packet contains two fields: IP priority and service type, of which IP priority occupies 3 bits.
- D. 802.1P priority is identified by the prionity field in the VLAN tag
正解：C、D
質問 # 235
Mid-range and high-end switch equipment has its own redundancy. If a core switch in a customer network has dual main control boards with active and standby redundant hot backup, AC power supply
2+1 redundant hot backup, and fan system 1:1 hot backup, then which of the following operations may have a significant impact on the customer network? (Multiple choice)
- A. Unplug both power supplies.
- B. Unplug 1 fan
- C. Pull out the service board
- D. Pull out the standby main control board
正解：A、C
質問 # 236
In the switching network shown in the figure, VLAN10 is set as Super VLAN on switch SWA, VLAN2 and VLAN3 are Sub VLANs of VLAN10. Port Ethernet1/0/3 is a Trunk port with PVID of VLAN1, allowing all VLANs to pass through. VLAN2~VLAN20 are created on switch SWB, port Ethernet1/0/4 is a Trunk port with PVID of VLAN1, allowing all VLANs to pass through. After setting the IP addresses of each device as shown in the figure, check the MAC address table on SWA, and you can determine that PCC belongs to?
- A. VLAN 10
- B. VLAN 1
- C. VLAN 2
- D. VLAN 3
正解：C
質問 # 237
Regarding root bridge protection, which of the following statements are correct? (Multiple choice)
- A. If root bridge protection is not configured, the root bridge will lose its root bridge status if it receives a BPDU with a higher priority.
- B. After configuring root bridge protection, if ports receive a high-priority BPDU, the status of these ports will be set to Listening and no longer forward packets.
- C. The port will experience a transition from the Listening state to the Forwarding state. During this period, if the port does not receive a better BPDU, the port will return to the original forwarding state.
- D. Root bridge protection is configured in port view
正解：A、B、C、D
質問 # 238
As the network management supervisor of a company, Mr. Wang adheres to the following principles for selecting and applying network technologies and network equipment in network construction. As a network engineer, which technology selection and application do you think is not conducive to network management? (Multiple choice)
- A. Each manufacturer's network equipment must be managed using its own network management system
- B. The routing protocol must select a standard dynamic routing protocol
- C. Network equipment is provided by at least three different manufacturers
- D. All devices must support the standard topology discovery protocol
正解：A、C
質問 # 239
Two routers are connected together through a LAN to form a VRRP backup group. If router RTA receives a VRRP protocol message sent by router RTB, and the value of the Auth Type field in the message Priority field is 2, then which of the following is correct?
- A. Router RTB enables VRRPV2 protocol
- B. VRRP simple character authentication is enabled on router RTB
- C. Router RTB enables VRRPV3 protocol
- D. Router RTB is the owner of the VRRP IP address
正解：A
質問 # 240
Which of the following protocols are multicast routing protocols running between routers? (Multiple choice)
- A. MOSPF
- B. IGMPV2
- C. PIM
- D. MLD
- E. DVMRP
正解：A、C、E
質問 # 241
Regarding the comparison between MSTP and RSTP, which of the following statements are correct? (Multiple choice)
- A. MSTP inherits all the fast
- B. MSTP can achieve load sharing between VLANs
- C. The BPDU format used by MSTP and RSTP is the same
- D. The status and role of ports in MSTP and RSTP are exactly the same
正解：A、B
質問 # 242
In order to guide network equipment manufacturers to correctly manage equipment, ISO defines five major functions of network management. Which functions does the SNMP network management system implement? (Multiple choice)
- A. Performance Management
- B. Configuration Management
- C. Topology Management
- D. Equipment Management
- E. Fault Management
正解：A、B、C、E
質問 # 243
XYZ company's two LANs are located in different regions and are interconnected through the operator's network. The network topology is shown in the figure. Switches SWC and SWD are the company's network edge devices, and switches SWA and SWB are the operator's network edge devices.
Hosts PCA and PCB are located in VLAN2 of the company's network. The operator network assigns VLAN tags to XYZ company's data packets passing through it. Under normal circumstances, the port that needs to enable the Qinq function is? (Multiple choice)
- A. Ethernet 1/0/1 of switch SWA
- B. Ethernet 1/0/2 of switch SWB
- C. Ethernet1/0/1 of switch SWB
- D. Ethernet 1/o/2 of switch SWA
正解：B、D
質問 # 244
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