[2023年12月21日] H12-821_V1.0-ENUのPDF問題とテストエンジンには966問があります
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質問 # 22
What are the conditions for volume matching of firewall security policies? (Multiple choice)
- A. The source and destination safe area city
- B. Source and destination IP addresses
- C. Application
- D. Message length
正解：A、B、C
質問 # 23
Which of the following LSAs has a propagation range only in a single area? (Multiple choice)
- A. Router LSA
- B. Network LSA
- C. Summary LSA
- D. AS External LSA
正解：A、B
質問 # 24
There are 4 port roles defined in RSTP, among which the part role values in the flags field of the Alternative port and Backup port in the STP packet are always 01.
- A. FALSE
- B. TRUE
正解：B
質問 # 25
ICMPv6 has two types of Error Messages and Information Messages.
- A. True
- B. False
正解：A
質問 # 26
Which descriptions are correct about the IPv6 stateless auto-configuration of addresses through NDP?
(Multiple choice)
- A. The premise that a device can configure an address statelessly is that both interacting devices have generated a link-local address.
- B. In the RA message transmitted during the stateless address configuration process, the M-bit is set to 0
- C. In the process of stateless address configuration, two DAD detections are used to detect whether the link-local address conflicts
- D. In the process of stateless address configuration, except that DAD detection requires the exchange of NS and NA messages, other processes only need the participation of RA and RS messages
正解：A、B、D
質問 # 27
How many Bytes is the minimum total length of the address in IS-IS?
- A. 0
- B. 1
- C. 2
- D. 3
正解：B
質問 # 28
Which of the following descriptions about the default security zones Trust and Untrust of the firewall is correct? (Multiple choice)
- A. The direction of accessing the Untrust zone from the Trust zone is the Outboud direction
- B. The security level of Trust is 85
- C. The security level of Untrust is 50
- D. The direction of accessing the Untrust area from the Trust area is the Inboud direction
正解：A、B
質問 # 29
Which of the following descriptions about roaming group servers is wrong?
- A. The roaming group server needs to maintain the member table of the roaming group
- B. One AC can serve as roaming group server for multiple roaming groups at the same time
- C. After the AC is set as the roaming group server, it will join the roaming group by default and can manage other ACs
- D. The roaming group server manages each AC through the CAPWAP tunnel
正解：C
質問 # 30
In the routing rules of BGP, the manually aggregated route generated by the aggregate command has a higher priority than the automatically aggregated route generated by the summary automatic command.
- A. FALSE
- B. TRUE
正解：B
質問 # 31
RTA is the source DR router, and RIB is the RP router. The multicast source sends group blessing data to RTA, but the group blessing source Source registered with it through the PIMRegister message cannot be seen on the RIB. The possible reasons are as follows: (Multiple choice)
- A. The RP elected by RTA is not RTB
- B. There is no single-finger route from RTB to RTA, which causes RIB to fail the RPF check of the source
- C. The multicast network is statically configured with RP, but the RTA router is not statically configured with RP
- D. The multicast network dynamically elects RP, but RTA fails to check the RPF of BSR
正解：A、B、C、D
質問 # 32
As shown in the figure below, the RTC announces 10.1.1.0/24 into BGP, and the RTC is the client of the route reflector RTB, the router RT () will not receive the route entry 10.1.1.0/24 reflected by the RTB. (Use Uppercase)
正解：
解説：
Capital letter A
質問 # 33
About LSA3, LSA4 and LSA5, which of the following description is correct?
- A. LSA3 will not change after traversing different areas, while LSA4 and LSA5 will change
- B. LSA5 will not change after traversing different areas, while LSA3 will change
- C. LSA4 will not change after traversing different areas, while LSA3 and LSA5 will change
- D. LSA3, LSA4 and LSA5 will not change after traversing different areas
正解：B
質問 # 34
Which of the following descriptions about MP-BGP is wrong?
- A. MP-BGP can carry multiple network layer protocols
- B. MP-BGP can isolate the routing information of different address clusters from each other
- C. MP-BGP introduces two new optional non-transition path
attributes: MP_REACH_NLRI and MP_UNREACH_NLRI - D. A router that supports MP-BGP cannot interact with a router that only supports BGP-4
正解：D
質問 # 35
Which of the following does not belong to the OSI network management model?
- A. Management Model
- B. Functional Model
- C. Communication Model
- D. Organizational Structure Model
正解：D
質問 # 36
Which of the following descriptions about the characteristics of routing policies is wrong?
- A. It can improve the security of the network by controlling the receiving, publishing and importing of routes
- B. It can save system resources by controlling the size of the routing table of the router
- C. By modifying routing attributes, network data traffic can be reasonably planned to improve network performance
- D. Can modify routing attributes, but cannot change the path through which network traffic passes
正解：D
質問 # 37
On Huawei equipment, which of the following commands can be used to
configure VRRP and BFD linkage?
- A. bfd-session vrrp vrid 1 track session-nane 1 reduced 100
- B. track vrrp vrid 1 bfd-session session-name 1 reduced 100
- C. vrrp vrid 1 track bfd-session-name 1 reduced 100
- D. vrrp vrid 1 track bfd-session session-name 1 reduced 100
正解：D
質問 # 38
Which of the following descriptions about IS-IS area division is correct? (Multiple choice)
- A. In IS-IS, the backbone area and non-backbone area are connected by Level1-1-2 level routers
- B. In IS-IS, each router can only belong to one area
- C. In IS-IS, different interfaces of a single router can belong to different areas
- D. In IS-IS, the fixed area is defined as the backbone area
正解：A、B
質問 # 39
In the PIM protocol, which of the following packets have destination addresses that are unicast addresses? (Multiple choice)
- A. Register Stop
- B. Assert
- C. Graft
- D. Bootstrap
正解：A、C
質問 # 40
Which of the following statements about routing tools is incorrect? (Multiple choice)
- A. The prefix list can only be used to filter routing information, not data packets
- B. as-path-filter is a tool used to match the AS_Path attribute in BGP routing information. It can filter BGP routes independently according to the AS Path attribute of BCP routing
- C. community-filter is a tool used to match the community attributes in BGP routing information. It can filter BGP routes independently according to the Community attributes of BGP routes
- D. The access control list is used to match the address of routing information or data packets, and filter routing information or data packets that do not meet the conditions
正解：B、C
質問 # 41
Among the routing policy tools commonly used in BGP, the one that can be used to match a specific AS_path is:
- A. community-filter
- B. ip-prefix
- C. filter-policy
- D. ip as-path-filer
正解：D
質問 # 42
Which of the following parameters cannot be modified by the apply command of Route-Policy?
- A. OSPF overhead
- B. OSPF imports area types
- C. OSPF external route type
- D. OSPF process ID
正解：D
質問 # 43
Regarding the special area of OSPF, the wrong description is:
- A. The difference between the Totally Stub area and the NSSA area is that the Totally Stub area does not accept inter-domain routing information
- B. The difference between the Stub Area and the Totally stub area is that the Stub area allows fine-grained routing information between areas.
- C. The difference between the NSSA Area and the Stub area is that this area allows the introduction of external routes of the autonomous system, and the ABR issues an LSA7 advertisement to this area
- D. Totally Stub Area allows the ABR to advertise the default three-type LSA, but does not accept five-type LSA and refined three-type LSA
正解：C
質問 # 44
In the WLAN network, enable the HSB backup group. If the AP has been online on the main AC, and then add AP information offline on the standby AC, the AP status on the standby AC will be displayed as fault. In this case, you need to execute the undo hsb enable command in the HSB backup group view of the standby AC to disable the HSB active/standby backup function, and then execute the hsb enable command to enable the HSB active/standby backup function. At this time, the information on the active AC will be backed up to Standby AC, to achieve consistent backup of active and standby information, and the status of the AP on the AC will be displayed as standby.
- A. True
- B. False
正解：A
質問 # 45
In different scenarios, RSTP provides different protection functions. Which of the following statement is wrong?
- A. After the BPDU protection function is enabled on the switching device, if the edge port receives RST BPDU, the edge port will be set as a non-edge port, and the spanning tree calculation will be performed again
- B. The designated port with root protection enabled, when the port receives a better RSTBPDU, the port will enter the Discarding state and no longer forward packets. If the port does not receive a better RST BPDU for a period, it will automatically return to the normal Forwarding state
- C. After the anti-TC-BPDU message attack function is enabled, the number of times the switching device processes TC BPDU messages within a unit time is configurable
- D. The designated port with the root protection function enabled, its port role can only remain as the designated port
正解：A
質問 # 46
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