Huawei H12-821_V1.0-ENU試験問題（更新されたのは2023年）100%リアル問題解答
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質問 # 64
The AS border router can be an internal router R or an ABR, and must belong to the backbone area.
- A. TRUE
- B. FALSE
正解：B
質問 # 65
Telemetry is mainly used to monitor the network, including packet inspection and analysis, security intrusion and attack detection, intelligent data collection, application performance management, etc.
Which of the following descriptions about Telemetry is wrong?
- A. The number of managed devices is small, but the accuracy is high, suitable for small and medium-sized networks
- B. Support multiple implementation methods to meet the different needs of users
- C. It can quickly locate the fault, reaching the fault location speed of second level or even sub-second level
- D. The accuracy of data collection is high, and the types of items are very rich, fully reflecting the network status
正解：A
質問 # 66
Regarding network maintenance, which of the following statements are correct? (Multiple choice)
- A. Routine maintenance is an event-driven job
- B. Routine maintenance belongs to the work of the optimization stage (improve) in PDIOI
- C. The handling of some problems in the troubleshooting work can be incorporated into the daily maintenance work
- D. Routine maintenance is a routine plan
正解：C、D
質問 # 67
Data center equipment can be simply divided into computing equipment, storage equipment and network equipment.
Which of the following is not a network device?
- A. Load balancing
- B. Server
- C. Firewall
- D. IDS/IPS
正解：B
質問 # 68
Regarding the description of the routing tool, which of the following statement is incorrect?
- A. route- policy can only match routes and data packets, and cannot be used to modify routing attributes or data packet forwarding behavior
- B. Access Control List (ACL) is used to match the IP routing information or the address of the data packet
- C. The prefix list (ip- prefix) matches the destination address of the routing information
- D. as-path-filter is used to match the AS-PATH attribute in BGP routing information, so it can only be used to filter BGP routes
正解：A
質問 # 69
Part of the configuration of a router is shown in the figure, so which of the following descriptions about this part of the configuration is correct?
[HUAWEI] ip ip-prefix plpermit 10.0.192.0 8 greater-equal 17 less-equal 18
- A. In the 10.0.192.0/8 network segment, the route with a mask length of 21 will match the prefix list, and the matching rule is allowed
- B. In the 10.0.192.0/8 network segment, the route with a mask length of 20 will match the prefix list, and the matching rule is allowed
- C. In the 10.0.192.0/8 network segment, the route with a mask length of 18 will match the prefix list, and the matching rule is allowed
- D. In the 10.0.192.0/8 network segment, the route with a mask length of 19 will match the prefix list, and the matching rule is allowed
正解：C
質問 # 70
Which of the following statements about different types of firewalls is wrong?
- A. Proxy firewall acts as a proxy for business between internal network and external network users
- B. A stateful inspection firewall needs to be configured with security policies for the "go" and "return" directions of packets
- C. The state inspection firewall only checks the security policy for the first packet that does not hit the session
- D. Packet filtering firewall for each data packet passing through the firewall, an ACL matching check is performed
正解：B
質問 # 71
Which of the following descriptions about AS_Path is wrong
- A. BGP will not accept the route that contains this AS Number in the AS_Path attribute
- B. When there are two or more routes with the same destination in the router, these routes can use this attribute to compare the advantages and disadvantages of each other. The longer the AS_Path, the better the path
- C. AS_Path is a recognized mandatory attribute in BGP
- D. AS_Path refers to the list of ASs that BGP routes have experienced in the path of transmission
正解：B
質問 # 72
The following description about BGP, OSPF, ISIS, which the description is true?
- A. BGP runs based on UDP sessions, and the port number used is 179
- B. BGP neighbor relationship is established based on TCP session, and the port number used is 179
- C. ISIS runs based on IP protocol, the protocol number adopted is 89
- D. OSPF runs based on IP protocol, the protocol number adopted is 90
正解：B
質問 # 73
Which of the following statements about the OSPF protocol is wrong?
- A. OSPF supports load sharing for equal-cost routes
- B. OSPF packets are encapsulated in IP packets and can be sent in the form of unicast or multicast
- C. OSPF is an exterior gateway protocol based on link state
- D. OSPF protocol supports area division
正解：C
質問 # 74
Regarding the description of network address port translation (NAP ) and network address translation only (No-PAT), which of the following statements is correct?
- A. No-PAT only supports protocol port translation at the transport layer
- B. NAPT only supports protocol address translation at the network layer
- C. After NATP conversion, for external network users, all packets will only come from the same IP address
- D. No-PAT supports protocol address translation at the network layer
正解：C
質問 # 75
During the operation of DHCP, various message types will be exchanged, so which of the following messages are not sent from the client to the server?
- A. DHCP WANT
- B. DHCP DISCOVER
- C. DHCP RELEASE
- D. DHCP REQUEST
正解：A
質問 # 76
The RSTP protocol provides a variety of protection functions. For example, when the edge terminal port is configured in the protection state, the processing method of the edge port after receiving the BPDU message is:
- A. Directly discard the BPDU message
- B. Close the port
- C. Forward BPDU messages as required
- D. Obtain relevant information after the BPDU message
正解：B
質問 # 77
Which of the following statements about roaming is correct? (Multiple choice)
- A. AP that realizes wireless roaming must have signal coverage overlapping areas
- B. AP that realizes wireless roaming must be in the same Extended Service Set (ESS)
- C. The AP that realize wireless roaming must be in the same basic service set (BSS)
- D. An AP that realizes wireless roaming does not need to have a signal covering the overlapping area
正解：A、B
質問 # 78
The ACL command ac1 [number] ac1-number [ match-order {autol config}], where ac1-numnbe is used to specify the number of the access control list, and the value range of ac1-number of the basic access control list is ().
- A. 0~1000
- B. 3000~3999
- C. 1000~3999
- D. 2000 ~2999
正解：D
質問 # 79
What are the comparison items of the main switch election in the stack? (Multiple choice)
- A. Operating status
- B. MAC address
- C. Stack ID
- D. Stacking priority
正解：A、B、D
質問 # 80
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