リアルH12-831_V1.0試験PDFテストエンジン 練習テスト問題
Huawei H12-831_V1.0リアル2022年最新のブレーン問題集で模擬試験問題集
質問 118
Regarding the BGPI MPLS IPVPN network architecture, which of the following descriptions is wrong?
- A. Sites can visit each other through VPN, and a site can only belong to 1 VPN
- B. Under normal circumstances, CE equipment does not perceive the existence of VPN, and CE equipment does not need to support MPLS, MP-BGP, etc.
- C. The P device only needs to have basic MPLS forwarding capabilities and does not maintain VPN related information
- D. The BGP/MPLS IP VPN network architecture consists of three parts: CE (Customer Edge), PE (ProviderEdge), and P (Provider). PE and P are operator equipment, and CE is BGP/MPLS IPVPN user equipment.
正解: A
質問 119
In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description of the two layers of labels is wrong?
- A. The outer label is used to correctly send the data packet to the corresponding VPN on the PE device
- B. The outer label of MPLS VPNE is called the private network label, and the inner label is called the public network label.
- C. By default, the outer label is ejected before the packet is forwarded to the last-hop device
- D. The outer label of MPLS VPN is allocated by the LDP protocol or statically, and the inner label is allocated by the MP-BGP neighbor at the correct end.
正解: B
質問 120
During the process of viewing the debug output through the SSH terminal, a lot of information pops up. Which of the following operations can make the Monitor terminal no longer pop up the debug message? (Multiple choice)
- A. Open the notepad, enter undo terminal monitor, copy the command line, and paste it into the monitor interface
- B. Open the notepad, enter undo debugging all, copy the command line, and paste it into the Monitor interface
- C. Exit the current Monitor interface, log in to the device again using SSH to open a new Monitor interface
- D. Open the notepad, enter undo terminal debugging, copy the command line, and paste it into the Monitor interface
正解: B,D
質問 121
In an intra-domain MPLS VPN network, when a data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description is wrong about the two layers of labels? (Multiple choice)
- A. The outer label of MPLS VPN is called the private network label. The inner label is called the public network label.
- B. The outer label is used to correctly send the data packet to the corresponding VPN on the PE device
- C. By default, the outer label is ejected before the packet is forwarded to the last-hop device
- D. The outer label of MPLS VPN is allocated by the LDP protocol or statically, and the inner label is allocated by the MP-BGP neighbor at the correct end.
正解: A,B
質問 122
As shown in the figure, all interfaces of the router enable OSPF, and the configurations of R1, R2, and R3 are as shown in the figure, then () will generate a Type 3 LSA with a linkState ID other than 0.0.0.0. (Please fill in the device name, such as R1)
正解:
解説:
R3
質問 123
Which of the following series can be matched by the regular expression 100.S? (Multiple choice)
- A. 0
- B. 1
- C. 2
- D. 3
正解: C,D
質問 124
IGP converges faster than BGP, which may cause network traffic loss. By enabling the OSPF and BGP linkage feature of the device, the device remains as a () router within the set linkage time, so that the link metric value in the advertised LSA is the maximum value, thereby telling other OSPF devices not to use this router to forward data, so as to avoid the loss of traffic. (Note: If English letters are involved, all capitals are required)
正解:
解説:
STUB
質問 125
Network administrator A wants to use ACL to match specific routing entries. Which of the following routing entries will be matched by the ACL rules in the figure? (Multiple choice) acl number 2000 rule 10 permit source 10.0.0.0 0.0.6.0
- A. 10.0.1.0/24 :
- B. 10.0.2.0/24
- C. 10.0.0.1/32
- D. 10.0.0.0/24
正解: B,D
質問 126
The network administrator A wants to use ACL to match only the four routing entries 1, 3.5, and 7 in the figure. How many ACL rules does the network administrator A need to configure at least?
- A. 0
- B. 1
- C. 2
- D. 3
正解: B
質問 127
Which of the following reasons may cause the hosts in the same VLAN of the LAN to fail to communicate? (Multiple choice)
- A. Port isolation is configured on the switch
- B. The interface is manually shut down or the physical interface is damaged
- C. Wrong port and MAC address binding is configured on the switch
- D. Switch MAC address learning error
正解: A,B,C,D
質問 128
An engineer uses two routers to test IPv6 services, and simulates the interconnection between the headquarters and branches by running BGP4+. As shown in the figure, an engineer captures the packet to view the update message sent by R1.
Regarding the description of the message information, which of the following statements is correct?
- A. The route described in the message may be imported through import
- B. The next-hop address of the route described in this message is: 2001:db8::2345:1.:1
- C. The routing address prefix and its prefix length described in this message are: 2001:db8:2345:1::1/128/
- D. The message describes the currently revoked IPv6 route
正解: C
質問 129
MPLS has the concept of FEC forwarding equivalence class, so FEC cannot be allocated based on which of the following standards?
- A. Destination Addess
- B. Fragment of fiset
- C. Class of Service
- D. Application Protocol
正解: B
質問 130
Regarding the MPLS forwarding process, which description of the ingress node forwarding is correct? (Multiple choice)
- A. Check the NHLFE entry, you can get the outgoing interface, next hop, outgoing label, and label operation type. The label operation type is Push
- B. Find the corresponding NHLFE entry according to the Tunnel ID of the ILM table, and associate the LFlB entry with the NHLFE entry
- C. After receiving the data packet, the Ingress node will first check the ILM table to find the Tunnel ID
- D. Press the obtained label in the IP packet, and process EXP according to the QoS policy, and process L at the same time, and then send the encapsulated MPLS packet to the next hop
正解: A,D
質問 131
As shown in the figure, MPLS/BGP IPVPN is deployed in the network. The MP-BGP neighbor relationship is established between PE1 and PE2 through the LoopbackD interface. After the configuration is completed, it is found that CE1 and CE2 cannot learn routes from each other. Use the command on PE2 to query neighbor information as shown in the figure. What is the most likely cause of the problem?
- A. The routing protocol configuration between PE1 or PE2 and the respective CE is incorrect
- B. PE1 and PE2 are not enabled with neighbors in the BGP-VPN4 unicast address family view
- C. The LSP tunnel between PE1 and PE2 is not established
- D. The VPN instance parameters on PE1 or PE2 are incorrectly configured
正解: B
質問 132
Which of the following BGP routing attributes cannot control BGP route selection?
- A. MED
- B. Originator ID
- C. Community
- D. AS Path
正解: C
質問 133
As shown in the figure, all routers run OSPF, because R3 is in the backbone area, so there is no type 3 LSA in the LSDB of R3.
- A. FALSE
- B. TRUE
正解: A
質問 134
According to this picture, what can we know? (Multiple choice)
- A. R1 accesses the path of 172.17.1.5 without any problems
- B. R1 has a route to 172.17.1 5
- C. R1 access 172.17.1.5 has a loop
- D. R1 does not access the route of 172.17.1.5
正解: B,C
質問 135
Which of the following descriptions is correct about configuring static LSP in MPLS network? (Multiple choice)
- A. When a certain LSR is an Egress LSR, only In Labe1 needs to be configured, the range is 16~1023
- B. When an LSR is an Ingress LSR, only Out Label needs to be configured, ranging from 16 to 1048575
- C. When a certain LSR is a Transit LSR, In Labe1 and 0ut Label need to be configured at the same time, the range is 16~1023
- D. When a certain LSR is a Transit LSR, In Labe1 and Out labe1 need to be configured at the same time, the range of In Labe1 is 16~1023, and the range of Out Labe1 is 16~1048575
正解: A,B,D
質問 136
Ethernet is a network that supports broadcasting. Once there is a loop in the network, this simple broadcasting mechanism will cause catastrophic consequences.
Which of the following phenomena may be caused by loops? (Multiple choice)
- A. When you use the display interface command to view interface statistics on the device, it is found that the interface receives a large number of broadcast packets
- B. CPU usage exceeds 70%
- C. The device cannot log in remotely
- D. Severe packet loss during network testing through the ping command
正解: A,B,C,D
質問 137
As shown in the figure, the router runs OSPF and Area2 is a completely stub area. Please match the type of LSA contained in each area with the area ID.
Type1 LSA , Type2 LSA , Type3 LSAType1 LSA , Type2 LSA , Types LSA , Type5 LSAType1 LSA , Type2 LSA , Type3 LSA , Type4 LSA , Type5 LSA
正解:
解説:
質問 138
Which of the following is wrong about DHCP Snooping?
- A. Enable the DHCP Snooping function in the interface view, then all the DHCP message command functions under the interface will take effect
- B. DHCP Snooping can prevent illegal attacks by setting trusted ports (all interfaces are untrusted by default)
- C. Enable DHCP Snooping globally, without any post parameters, the device only processes DHCPv4 messages by default
- D. Enable the DHCP Snooping function in the VLAN view, and the command function of DHCP messages belonging to the VLAN received by all interfaces of the device will take effect
正解: B
質問 139
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