Latest [Feb 18, 2022] GB0-371-ENU Exam with Accurate Constructing H3C High-Performance Campus Networks PDF Questions
Take a Leap Forward in Your Career by Earning H3C 337 Questions
NEW QUESTION 111
The customer's two routers are connected together through a LAN, and the two routers form a VRRP backup group and the related configuration is as follows:
[RTA-GigabitEthernet1 /0]display this
ip address 192.168.0.252 255.255.255.0
vrrp vrid 1 virtual-ip 192.168.0.254
vrrp vrid 1 priority 120
[RTB-GigabitEthernet1/0]display this
ip address 192.168.0.253 255.255.255.0
vrrp vrid 1 virtual-ip 192.168.0.254
RTA router GigabitEthernet1/0 interface MAC is 000f-4300-0001, RTB router GigabitEthernet1/0 interface MAC is 000f-4300-0002 If RTA adopts aggregation group Real-mac mode, RTB adopts aggregation group virtual-mac mode, from the above information Learned
- A. The gateway MAC received by the LAN PC is 0000-5e00-0101
- B. RTA and RTB cannot establish VRRP group
- C. The gateway MAC received by the LAN PC is 000f-4300-0001
- D. If the gateway MAC received by the LAN PC is 0000-5e00-0101, the router RTB is in the VRRP Master state
Answer: C,D
NEW QUESTION 112
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. 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
- B. SWB packets from GigabitEthernet1/0/3 of SWA come out of GigabitEthem1/0/1 without VLAN
- C. When SWB accesses PCA, after the packet comes out of the GigabitEthem1/0/4 port of SWB, the VLAN Tag carried is VLAN20
- 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
Answer: B
NEW QUESTION 113
Regarding TC protection, the following statements are correct
- A. 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
- B. TC protection is configured in the system view
- C. After the switch receives the TC-BPDU message, it will delete the MAC address table entry
- D. 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
Answer: A,B,C,D
NEW QUESTION 114
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. As shown in the figure, when SWB is connected to another switch running RSTP, SWD will send RSTBPDU with TC set.
- B. When the link between SWB and SWC is down, both SWB and SWC will send RST BPDU with TC set
- C. When SWC edge port E0/1 is connected to a PC, SWC will send RST BPDU with TC set
- D. As shown in the figure, when SWB is connected to another switch SWD running RSTP, SWB will send RSTBPDU with TC set
Answer: D
NEW QUESTION 115
Which of the following statements about multicast VLAN is correct is
- A. The sub-VLANs of the multicast VLAN must also enable the IGMP-Snooping function
- B. Multicast VLAN not only saves bandwidth, but also reduces the burden on Layer 3 devices
- C. The VLAN that the host belongs to needs to be configured as a sub-VLAN of the multicast VLAN
- D. Multicast VLAN needs to enable IGMP-Snooping function
Answer: B,C,D
NEW QUESTION 116
After executing the displayinterface Ethernet 1/0/1 command on the switch SWA, the output information is as follows:
[SWA]display interface Ethernet 1/0/1
Ethernetl/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 VLAN10 tags will not be discarded when entering port Ethernet1/0/1
- B. Data frames with VLAN20 tags can be forwarded from port Ethernet1/0/1
- C. Port Ethernet1/0/1 is a Trunk port, allowing all VLAN data to pass through
- D. Data frames with VLAN1 tags will be stripped of tags when they leave port Ethernet1/0/1
Answer: A,C
NEW QUESTION 117
Regarding the description of Isolate-user-vlan technology and Super VLAN technology, the following is correct
- A. SuperVLAN is a three-layer VLAN technology, so all switches that support Super VLAN technology are three-layer switches
- B. Isolate-user-vlan is a Layer 2 VLAN technology, so switches that support isolate-user-vlan technology are Layer 2 switches
- C. SuperVLAN technology is also called VLAN aggregation: the main purpose is to solve the waste of IP addresses or insufficient number of VLAN interfaces
Answer: A,C
NEW QUESTION 118
If port-based VLAN, MAC address-based VLAN, protocol-based VLAN, and IP subnet-based VLAN are simultaneously enabled on a port of the switch, by default, VLANs will be matched in order
- A. MACVLAN subnet VLAN protocol VLAN port VLAN
- B. Port VLAN MACVLAN Protocol VLAN IP Subnet VLAN
- C. MACVLAN Port VLAN Protocol VLAN Subnet VLAN
- D. Port VLAN IP Subnet VLAN Port VLAN MAC VLAN
Answer: A
NEW QUESTION 119
The figure shows the stable topology after STP calculation and convergence, then the following statements are correct:
- A. The sending period of this BPDU is HelloTime
- B. The port saves the aging time of the BPDU as MaxAge
- C. The BPDU is a configuration BPDU, the destination address is 01-80-C2-00-00-0
- D. SWA is the root bridge in the network
Answer: A,B,C,D
NEW QUESTION 120
In the switching network as shown in the figure, VLAN10 is set as Super VLAN on the switch SWA, VLAN2 and VLAN3 are Sub VLANs 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, allowing all VLANs to be judged by setting the IP address of each device as shown in the figure (choose one or more)
- A. SWB can communicate with PCC
- B. SWB can communicate with PCB
- C. None of the above answers
- D. SWB can communicate with SWA
- E. SWB can communicate with PCA
Answer: C
NEW QUESTION 121
Regarding the compatibility configuration of MSTP, there are correct statements
- A. When switches from different vendors are interoperable with MSTP, as long as the domain name, revision level, and VLAN instance mapping relationship configuration are exactly the same, you can ensure that the switches belong to the same MST domain
- B. Due to the different keys of different vendors, even if the VLAN instance mapping relationship is the same, different summary results may be obtained
- C. When digest snooping is configured, the H3C switch will use the same hash algorithm and key as the peer vendor when performing digest calculation
- D. H3C switches can realize MSTP intercommunication with switches of other manufacturers through configuration summary snooping,
Answer: B,D
NEW QUESTION 122
What is correct about IGMP Snooping?
- A. Using the iIGMP Snooping function on the Layer 2 device can establish and maintain multicast forwarding entries at the data link layer, so that multicast data can be forwarded normally at the data link layer
- B. The unknown multicast group dropping function can be enabled on the switch. When the switch receives unknown multicast data packets, it will only forward to its router port and not broadcast in the VLAN.
- C. Port quick leave means that when the switch leaves the IGMP Leave message, it directly deletes the port from the outgoing port list of the corresponding forwarding entry
- D. Both IGMP & IGMP Snooping can be configured in the same VLAN
Answer: B,C
NEW QUESTION 123
Which of the following methods does RADIUS use to ensure the correctness of messages exchanged between the RADIUS server and the RADIUS client?
- A. RADIUS protocol uses timers to manage message sending
- B. Each message sent by the RADIUS protocol has an independent and unique sequence number
- C. RADIUS protocol uses TCP to reliably transmit messages
- D. RADIUS protocol has a message retransmission mechanism
Answer: A,D
NEW QUESTION 124
In the networking shown in the figure, the interconnection lines between RT1, RT2, RT3 and RT4 are all 1000Mbps links except for the 10Mbps link sharing the Ethernet part, and the four routers run OSPF protocol to make the routing interoperable. The PIMSM protocol is running between them, and the RP is 1.1.1.1. There are receivers on the downstream interfaces of RT1 and RT2, and IGMP is enabled on the corresponding interfaces. Then, when the receiver (Received) sends a group join request, which of the following routers exist (*, G) table entry
- A. RT1
- B. RT3
- C. RT2
- D. RT4
Answer: A,B,C,D
NEW QUESTION 125
Routers running PIM-DM will periodically send Hello messages to discover neighbors, establish and maintain neighbor relationships. The following descriptions of Hello messages are correct. __
- A. When there are multiple routers running IGMPV1 on the shared network segment, the DR is elected for the shared network segment through the PIMHello message, and the DR serves as the Querier of IGMP
- B. If Hello messages have the same priority, the router with the smaller interface IP address will become the DR
- C. The router sends PIM Hello in multicast mode, the destination address is 224.0.0.13
- D. If the remaining routers do not receive the Hello message sent by the DR within the timeout period, a new DR election process is triggered
- E. When the DR is elected, the router with the higher priority of the Hello message will become the DR
Answer: A,C,D,E
NEW QUESTION 126
Regarding the POE system, the correct statement is
- A. The POE system includes two parts: PSE equipment and PD equipment, where PD is the power supply device, and PSE is the power receiving device
- B. POE usually uses mid-span and end-span power supply methods
- C. The voltage provided by the POE power supply is 48V, and the output power usually does not exceed 13W
- D. Usually PSE can support two methods of mid-span and end-span, PD can only support one
Answer: B,C
NEW QUESTION 127
What is the correct statement about the MSTP calculation process?
- A. After the MSTI calculation is completed, the data flow between the domain and the domain must pass through the Master port
- B. The mapping relationship between VLANs and instances in different MST regions is independent and can be different or the same
- C. Root bridge of MSTI The root bridge of IST can be the same switch
- D. After the MSTI calculation is completed, the same physical port may have different roles in different instances
Answer: B,C,D
NEW QUESTION 128
Regarding the designation of the MSTP root bridge, the correct statement is
- A. If not specified, the root bridge of all instances in the MST region is the root bridge of IST by default
- B. Use the rootsecondary command to specify the backup root bridge in an instance. When the root bridge fails or is shut down, the backup root bridge can replace the root bridge and become the root bridge of the specified spanning tree instance
- C. The rootprimary command can be used to specify the first preference in an instance. After the command is specified, the priority of the root bridge cannot be modified
- D. If multiple backup root bridges are set, when the root bridge fails, the backup root bridge with the smallest MAC address will become the root of the specified MST instance
Answer: A,B,C,D
NEW QUESTION 129
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