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H3C GB0-371-ENU PDF Questions - Exceptional Practice To Constructing H3C High-Performance Campus Networks
NEW QUESTION 127
Regarding RP and BSR, which of the following statements are correct?
- A. BSR is responsible for collecting and publishing RP information in PIM-SM domain i
- B. When configuring RP through dynamic election, you can configure the router that intends to become RP as C-RP
- C. There can only be one BSR in a PIM-SM domain
- D. RP in PIM-SM can be specified manually or dynamically elected
Answer: A,B,C,D
NEW QUESTION 128
The following statements about PIM SM are correct:
- A. When a multicast source initially sends traffic, an (S, G) entry will be formed on the DR connected to it
- B. Before the multicast traffic is normally forwarded from the RP to the multicast receiver, the routers along the way have established (*, G) entries
- C. The RP will forward multicast traffic downstream only after receiving the data forwarded by the multicast source.
- D. 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
Answer: A,B
NEW QUESTION 129
In the PIM-DM network as shown in the figure, part of the unicast routing table of routers RT1 and RT2 is as follows
<RT1>display ip routing-table
Routing Tables: Public
Destination/MaskProtoPreCost NextHop Interface
10.1.1.0/30 Direct 0010.1.1.2Port1
10.1.1.1/32 Direct 0010.1.1.1Port1
10.1.1.2/32 Direct 00127.0.0.1 InLoopO
11.1.1.0/30 Direct 0011.1.1.1Port2
11.1.1.1/32 Direct 00127.0.0.1 InLoopO
12.1.1.0/30 Direct 0012.1.1.1Port3
12.1.1.1/32 Direct 00127.0.0.1 InLoopO
100.1.1.0/240SPF 10 1563 10.1.1.1 Portl
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
100.1.0.0/160SPF 10 311.1.1.2 Port2
<RT2>display ip routing-table
Routing Tables: Public
Destination/MaskProtoPreCost NextHop Interface
20.1.1.0/30 Direct 0020.1.1.2Port1
20.1.1.1/32 Direct 0020.1.1.1 Portl
20.1.1.2/32 Direct 00127.0.0.1 InLoopO
11.1.1.0/30 Direct 0011.1.1.2Port2
11.1.1.2/32 Direct 00127.0.0.1 InLoopO
22.1.1.0/30 Direct 0022.1.1.1Port3
22.1.1.1/32 Direct 00127.0.0.1 InLoopO
100.1.1.0/240SPF 10 1564 11.1.1.1 Port2
127.0.0.0/8 Direct 00127.0.0.1 InLoopO
127.0.0.1/32Direct 00127.0.0.1 InLoopO
100.1.0.0/160SPF 10 220.1.1.1 Portl
Then, the (S, G) entry and exit interface lists of routers RT1 and RT2 are respectively
- A. RT1 outgoing interface list: Port2, Port3
- B. RT2 incoming interface list: Portl
- C. RT1 incoming interface list: Portl
- D. RT2 outgoing interface list: Port2, Port3
Answer: A,C
NEW QUESTION 130
Regarding the MST domain, the correct statement is
- A. Switches running MSTP need to exchange a complete mapping relationship between VLANs and instances. If the mapping relationship is different, the switches do not belong to the same MST domain.
- B. If the MST domain names configured on the two switches are not the same, the two switches must belong to different MST domains
- C. Switches belonging to the same MST domain must have the same VLAN and instance mapping relationship
- D. RSTP runs between MST regions
Answer: B,C,D
NEW QUESTION 131
The SSH protocol is widely used as a secure remote login protocol. What is correct about SSH is _______
- A. SSH uses additional encryption technology to ensure login security
- B. SSH can also provide a secure transmission channel for FTP
- C. SSH uses TCP port 22 to transmit data and port 23 to establish a connection
- D. SSH and Secure Shell can use DES authentication to ensure data security
Answer: A,B,D
NEW QUESTION 132
When the switch running MSTP and the switch running RSTP work together, the statement is correct.
- A. The RSTP switch regards the MST domain as a logical switch, and the bridge ID is the ID of the switch directly connected to the RSTP switch in the MST domain
- B. MSTP switch will parse RSTBPDU into MST BPDU, where IRPC is 0
- C. MSTP switch and RSTP switch can belong to the same MST domain
- D. The MSTP switch will treat the RSTP switch as an MSTP domain composed of a single switch
Answer: B,D
NEW QUESTION 133
What is correct about the interoperability between Sub VLANs in SuperVLAN technology?
- A. Layer 2 isolation between hosts in different SubVLANs, Layer 3 can communicate with each other through the local proxy ARP technology of the Super VLAN interface
- B. The hosts in different SubVLANs are isolated at the second layer, and the third layer can communicate with each other through the ordinary proxy ARP technology of the Super VLAN interface
- C. Host IP addresses in different SubVLANs belong to the same network segment, and they can communicate directly with each other through Layer 2 forwarding
- D. Host IP addresses in different SubVLANs belong to the same network segment, but due to the isolation effect of Sub VLANs, it is impossible to achieve intercommunication between Sub VLANs.
Answer: A
NEW QUESTION 134
Regarding the comparison of the calculation convergence of RSTP and STP, the correct statement is
- A. Compared with STP, RSTP defines a fast root port switching mechanism^ This can make Alternate quickly become a new root port
- B. Compared with STP, RSTP defines the designated port fast switching mechanism, which can make the designated port quickly enter the forwarding state without waiting for twice the Forward Delay time
- C. Compared with STP, RSTP defines the edge port, which can make the port connected to the i machine quickly enter the forwarding state
- D. If STP wants to shorten the convergence time, you can only configure a smaller ForwardDelay time, but it may affect the stability of the network
Answer: A,B,C,D
NEW QUESTION 135
Two routers RTA and RTB are connected through a LAN to form a VRRP backup group. The interface configuration of each router is as follows:
GigabitEthernet1/0 of RTA
ip address 192.168.0.252 255.255.255.0
ip address 192.168.1.252 255.255.255.0 sub
vrrp vrid 1 virtual-ip 192.168.0.254
vrrp vrid 1 priority 120
vrrp vrid 2 virtual-ip 192.168.1.254
GigabitEthernet1/0 of RTB
ip address 192.168.0.253 255.255.255.0
ip address 192.168.1.253 255.255.255.0 sub
vrrp vrid 1 virtual-ip 192.168.0.254
vrrp vrid 2 virtual-ip 192.168.1.254
vrrp vrid 2 priority 120
From the above information-know
- A. Router A is the master router of backup group 1, and router B is the master router of backup group 2.
- B. Router A is the master router of backup group 1, and backup group 2 has no master router
- C. Backup group 1 can be successfully established, and backup group 2 can be successfully established
- D. Backup group 1 can be successfully established, but backup group 2 cannot be successfully established
Answer: A,C
NEW QUESTION 136
There are multiple IGMPv2 group member hosts (Client1/Client2/Client3) in the shared network segment, and multiple IGMPv2 routers (Router1/Router2), as shown in the following figure:
||192.168.207.254 192.168.207.253
|| Router1 Router2
||+++++
||111
|| III
||Clientl Client2 Client3
||192.168.207.1 192.168.207.2192.168.207.3 Then, the following statement is correct
- A. After the host receives the general group query message, Clientl sending the Report message for joining Group A will not inhibit the Report message for Client2 joining Group B
- B. After the host receives the general group query message, Client1, Client2, and Client3 may all send the corresponding
- C. Only Router2 periodically sends general group queries to the shared network segment
- D. Routerl and Router2 periodically send general group queries to the shared network segment
- E. After the host receives the query message, only Client1 sends the Report message
- F. Only Router1 periodically sends general group queries to the shared network segment
Answer: A,B,C
NEW QUESTION 137
In the PIM-DM networking, about the router sending Prune (prune) message, the description is correct:
- A. Assert (assertion) the losing party will send to the winning party
- B. When the router has no local directly connected multicast receivers, it will send Prune to all PIM neighbors
- C. When the outgoing interface list in the router (S, G) table entry is empty, Prune messages will be sent to all PIM neighbors
- D. After the router interface receives the Prune message, it will no longer send packets of the corresponding multicast group on this interface
Answer: A
NEW QUESTION 138
Regarding the generation of TCNBPDU, the following statements are correct
- A. If the designated port link of a switch in the network is broken, the switch must generate TCNBPDU
- B. If the alternate port of a switch in the network is down, the switch will not generate TCN BPDUs
- C. STP-enabled non-root bridge switch If a port is connected to a PC, when the port enters the Forwarding switch, it will not produce TCN BPDU
- D. When a port of the switch is selected as the designated port or root port, the switch will immediately send TCNBPDU
Answer: B
NEW QUESTION 139
As shown in the figure, each switch enables RSTP. Assuming that each link has the same cost value, the following statement is correct
- A. If RSTP is cancelled on SWB, SWC port E0/1 will become the root port
- B. SWB port E0/1 is an alternate port
- C. If both SWB and SWC RSTP are cancelled, the SWA port E0/2 will become the Backup port
- D. Network calculation convergence does not need to wait twice the ForwardDelay time
Answer: A,B,C,D
NEW QUESTION 140
The customer LAN switches SWA, SWB, and SWC form the RRPP ring main ring 1, and 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 the switch SWA is the master node of primary ring 1, if the switch SWB port GigabitEthem2/0/1 fails, you can know from the above information
- A. SWA will send Link-Down messages to notify all nodes
- B. The switch SWA immediately switches the state to the Failed state and releases the secondary port
- C. If the switch SWB finds that the port GigabitEthernet 2/0/1 becomes Up again, it will immediately unblock the port
- D. The switch SWA will send a Common-Flush message to notify all transmission nodes
Answer: B,D
NEW QUESTION 141
The customer LAN switches SWA, SWB, SWC, and SWD form an RRPP ring, the main ring 1. The switch SWD is connected to the switches SWB and SWC, but not to the switch SWA. The switch SWD has the following configuration information:
[SWD]rrpp domain 1
[SWD-rrpp-domain 1 ]ring 1 node-mode transit primary-port gigabitethernet 2/0/1 secondary-port gigabitethernet 2/0/2 level 0
If the switch SWA is the master node of primary ring 1, if the switch SWD port GigabitEthem1/0/ fails, you can know from the above information
- A. SWA will send Link-Down messages to notify all nodes
- B. The switch SWC immediately switches the state to the Failed state and releases the secondary port
- C. The switch SWA immediately switches the state to the Failed state and releases the secondary port
- D. If the switch SWD finds that the Gigabit port of the port is Up again, it will immediately unblock the port
Answer: C
NEW QUESTION 142
As shown in the network, SWA and SWD enable RSTP, but SWB and SWC do not enable spanning tree protocol, the following statements are correct:
- A. Because SWB and SWC do not enable spanning tree protocol, when the root port of SWD is down, the alternate port cannot immediately become the new root port and enter the forwarding state
- B. When the SWB port E0/2 is down, the SWD port E0/2 will wait 3 Hello Time before it becomes the new root port and enters the forwarding state
- C. SWD will have a port role as Alternate
- D. When the SWB port E0/2 is down, the SWD port E0/2 will become the new root port and immediately enter the forwarding state
Answer: B,C
NEW QUESTION 143
Regarding the generation of TCN BPDUs, which of the following statements are correct
- A. If the designated port link of a switch in the network is broken, the switch must generate TCN BPDUs
- B. When a port of the switch is selected as the designated port or root port, the switch will immediately send TCNBPDU
- C. If the Alternate port link of a switch in the network is broken, the switch will not generate TCN BPDUs
- D. STP-enabled non-root bridge switch If a port is connected to a PC, when the port enters the Forwarding switch, no TCN BPDU will be generated
Answer: C
NEW QUESTION 144
In the switching network as 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? VLAN20 is created on switch SWB, and VLAN20 is set as Isolate-user-vlan , VLAN4 is VLAN20 Secondary VLA after setting the IP address of each device as shown in the figure, if the local proxy ARP function is enabled on both SWA and SWB, and both SWA and SWB are allowed to send ICMP packets, then on PCA Execute the command tracert 10.1.1.2, the PCA will show that it needs to go through a jump to reach the PCB (please fill in the Arabic numbers)
Answer:
Explanation:
2
NEW QUESTION 145
The customer's two switches SWA and SWB are connected together through seven Ethernet cables, and are configured with dynamic link aggregation. The corresponding ports on the switch SWA are Ethernet 1/0, Ethernet 1/0/2, and Ethernet 1/0/3 , Ethernet 1/0/4, Ethernet 1/0/5, Ethernet 1/0/6, Ethernet1/0/7 If the switches SWA and SWB only support 6 ports per aggregation group, and the SWA switch has the following configuration:
[SWA]interface Ethernet 1/0/7
[SWA-Ethernet1/0/7]lacp port-priority 4096
The LACP status output on the device is as follows:
[SWA]display lacp system-id
Actor System ID: 0x8000, 00e1-fc00-5000
[SWB]display lacp system-id
Actor System ID: 0x8000, 00e0-fc43-7384
From the above information, we can know_
- A. When the configuration of each port is the same, the Ethernet1/0/7 port is the Unselected port of the aggregation group
- B. In the case of the same port configuration, the Ethernet1/0/2 port is the Unselected port of the aggregation group
- C. In the case of the same port configuration, Ethernet1/0/6 port is the Unselected port of the aggregation group
- D. In the case of the same port configuration, Ethernet1/0/1 port is the Unselected port of the aggregation group
Answer: A
NEW QUESTION 146
The customer LAN switches SWA, SWB, and SWC form the RRPP ring main ring 1. If the switches SWB, SWC and SWD form sub-ring 2, the above information can be derived
- A. If the switch SWA is the master node of the primary ring, it can initiate Link-Down packets
- B. If the switch SWB is the edge node of the sub-ring, it can initiate Maior-Fault packets
- C. If the switch SWA is the master node of the primary ring, it can initiate a Health message
- D. If the switch SWB is the edge node of the sub-ring, it can initiate Edge-Hello packets
Answer: C,D
NEW QUESTION 147
In the switching network as shown in the figure, VLAN10 is set as Isolate-user-vlan on the switch SWA, VLAN2 and VLAN3 are set as the Secondary VLAN of VLAN 10; VLAN2? VLAN20 is created on the switch SWB, and VLAN20 is set as Isolate-user-vlan , VLAN4 is VLAN20 Secondary VLA after setting the IP address of each device as shown in the figure, if the local ARP proxy function is enabled on both SWA and SWB, and both SWA and SWB are allowed to send ICMP packets, then on PCA Run the tracert 10.1.1.2 command, the PCA shows that the destination IP address reached by the first hop is
Answer:
Explanation:
10.1.1.5
NEW QUESTION 148
In the network shown in the figure, the corresponding configuration is completed on the switch SWA, and the switch SWA and each PC have learned that the corresponding ARPPCA sent an ICMP request message when accessing the PCB, and the destination MAC address of the message is _
- A. MAC-20
- B. MAC-10
- C. MAC-B
- D. FFFF.FFFF.FFFF
Answer: B
NEW QUESTION 149
Regarding the compatible operation of RSTP and STP, the following statements are correct:
- A. When the RSTP switch and STP switch work together, you need to switch the working mode of the RSTP switch to STP through the command stpmode stp
- B. When the RSTP switch and STP switch work together, the port connected to the STP switch will switch to STP mode
- C. When a port on the RSTP switch is switched to STP mode, the port will no longer have the rapid convergence characteristics of RSTP
- D. When the connection between the RSTP switch and the STP switch is disconnected, the port previously connected to the STP switch will automatically switch back to RSTP mode
Answer: B,C
NEW QUESTION 150
Regarding loop protection, the following statements are correct
- A. Link congestion or single link may cause loops
- B. After the loop protection function is activated, when the BPDU saved on the port ages, the loop protection takes effect
- C. In MSTP, this function is valid for root port, alternate port and backup port
- D. If the role of the root port changes, it will become the Discarding state, without forwarding packets, so that no loop will be formed in the network. The Discarding state will be maintained until the port receives the BPDU again and becomes the root port again.
Answer: A,B,C,D
NEW QUESTION 151
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