H12-821_V1.0-ENU Free Exam Study Guide! (Updated 966 Questions)
H12-821_V1.0-ENU Dumps for HCIP-Datacom Certified Exam Questions and Answer
Huawei H12-821_V1.0-ENU certification exam covers a range of topics that are essential for IT professionals in the Datacom Core Technology field. These topics include network architecture, network virtualization, network security, network management, and network optimization. H12-821_V1.0-ENU exam is designed to test the candidate's ability to apply their knowledge to solve real-world problems and scenarios.
NEW QUESTION # 564
Regarding BGP MED, which of the following descriptions are correct? (Multiple choice)
- A. By default, if the MED value is not set in the route attribute, press the process. If the bestroute med-none-as maximum command is configured. Then handle the maximum MED value of 4294967295
- B. The default value of BGP route MED is 0
- C. In BGP routing rules, the priority of MED is lower than AS-Path, Preferred-Value, Local-Preference, Origin
- D. By default, BGP routing rules can compare the distance between routes from different autonomous systems.
Answer: A,C
NEW QUESTION # 565
Which description of the LACP protocol is correct? (Multiple choice)
- A. Based on IEEE802.3au standard.
- B. Exchange information with the peer through LACPDU (LinkAggregationControlProtocolDataUnit)
- C. The devices at both ends determine the active interface according to the LACP priority and interface ID of the passive interface
- D. The devices at both ends determine the active end according to the system LACP priority and system D.
Answer: B,D
NEW QUESTION # 566
As shown in the figure, the output information of R1 is as follows, and the Router ID of the neighboring router of R1 is ()
Answer:
Explanation:
10.0.2.2
NEW QUESTION # 567
Which of the following statements about Layer 2 roaming and Layer 3 roaming is correct? (Multiple choice)
- A. The VLAN on the AP service set associated with the STA must be the same before and after layer-3 roaming
- B. Layer 2 roaming means that the client roams in the same subnet
- C. Layer 3 roaming means that the client roams between different subnets
- D. If the VLAN IDs associated with the front and back are the same when the STA roams, it must belong to Layer 2 roaming
Answer: A,C
NEW QUESTION # 568
Which is wrong about RIB and FIB?
- A. FIB directly guides the forwarding of packets
- B. The next hop in RIB is the IP address of the interface directly connected to the neighbor
- C. FIB is generated by RIB
- D. RIB does not directly guide the forwarding of packets
Answer: B
NEW QUESTION # 569
Which of the following descriptions about the difference between DIS in IS-IS and DR in OSPF are correct? (Multiple choice)
- A. The election of DIS and DR is to compare the priority first, and then compare the MAC address
- B. In the IS-IS broadcast network, routers with a priority of 0 also participate in the election of the DIS, while routers with a priority of 0 in OSPF do not participate in the election of the DR
- C. The election of DIS and DR follow the principle of preemption
- D. In the IS-S broadcast network, routers of the same level on the same network segment will form adjacency relationships, including all non-DIS routers will also form adjacency relationships. In OSPF, the router only establishes an adjacency relationship with the DR port BDR
Answer: B,D
NEW QUESTION # 570
Four routers are running IS-IS and have established adjacency relationships. The area numbers and router levels are marked as shown in the figure. If route penetration is configured on the R3 device, what is the cost value from R4 to 0.0.2.2/32?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 571
Which of the following types of headers is carried on the BFD detection message?
- A. IP header
- B. UDP header
- C. MAC header
- D. TCP header
Answer: B
NEW QUESTION # 572
Which of the following descriptions about the OSPF protocol is wrong?
- A. Routing information is only allowed to be published between backbone areas and non-backbone areas, and routing information is not allowed to be directly published between non-backbone areas
- B. There are four connection types described by Router-LSA: P2P/TransNet/StubNetl virtual link
- C. Each OSPF router uses only one Router-LSA to describe the local active connection status belonging to an area
- D. The Link State ID described in the third type of LSA is the router- id of the ABR
Answer: D
NEW QUESTION # 573
Which of the following statements about the BFD detection mode is correct? (Multiple choice)
- A. In query mode, once a BFD session is established, the system will no longer periodically send BFD control packets
- B. Asynchronous detection mode does not support echo function
- C. In asynchronous mode, the systems will send BFD control packets at the negotiated cycle. If a system does not receive the BFD control packets from the peer within the detection time, it will declare the status of the BFD session Down.
- D. Asynchronous mode is a commonly used BFD detection mode
Answer: A,B,C,D
NEW QUESTION # 574
Which of the following descriptions about ABR in 0SPF is wrong?
- A. ABR cannot generate Type 4 and Type 5 LSAs
- B. The ABR converts Type 1 and Type 2 LSAs in the connected non-backbone area into Type 3 LSAs and advertises them to the backbone area
- C. ABR converts Type 1, Type 2 LSA and Type 3 LSA in the backbone area into Type 3 LSA and publishes them to the connected non-backbone area
- D. There are multiple LSDBs on the ABR, and the ABR maintains an LSDBD for each area.
Answer: A
NEW QUESTION # 575
VPN technology that can only provide Layer 2 network interconnection.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 576
If you want to realize communication between different protocols, you can only use the method of routing import.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 577
To improve the reliability of RPs in a large network, deploy dynamic RPs. Please sort the dynamic RP election rules from high priority to low priority.
Answer:
Explanation:
NEW QUESTION # 578
A company newly purchased a network device. As a network administrator, what method is usually used to configure the device for the first time?
- A. TeInet
- B. Console port login
- C. FTP
- D. SNMP
Answer: B
NEW QUESTION # 579
Four routers are running IS-S and the adjacency relation has been established, and the level of area number and router are marked as shown, which of the following statements are true?
- A. Both R2 and R3 will have the Level-1's LSP of ATT set
- B. R1 does not have the LSP generated by R4, so R1 can only communicate with R4 through the default route
- C. Both R2 and R3 will have the Level-1's LSP of ATT set
- D. R2 and R3 learn default routes from each other, and there is a routing loop in this network
Answer: C
NEW QUESTION # 580
Which statement about IGMP Proxy is correct? (Multiple choice)
- A. IGMP Proxy is usually deployed on the device between the member hosts that access the device
- B. The downstream interface of the IGMP Proxy device generates multicast forwarding entries based on the information of member hosts joining and leaving the multicast group
- C. The IGMP Proxy device cannot replace the IGMP querier to send query messages to downstream member hosts to maintain group membership
- D. IGMP Proxy can detect link status in conjunction with NQA to achieve rapid switching between active and standby links
Answer: A,B,D
NEW QUESTION # 581
RSTP has been improved on the basis of STP, realizing fast convergence of network topology. However, both RSTP and STP are based on a single spanning tree, and there are some shortcomings, such as? (Multiple choice)
- A. Unable to achieve load balancing of data traffic in VLAN
- B. After the link is blocked, it will carry part of the traffic, which will not cause bandwidth waste
- C. It will shovel the problem of suboptimal path
- D. It will cause some VLAN paths to fail
Answer: A,C,D
NEW QUESTION # 582
Regarding the default routes of each protocol, which of the following description is wrong?
- A. ISIS can issue default routes
- B. BGP can deliver default routes
- C. OSPF cannot deliver the default route
- D. Static default routing can be configured
Answer: C
NEW QUESTION # 583
Which of the following descriptions about the DHCPv6 address allocation process is correct?
- A. If it is necessary to renew the lease of the address obtained from the DHCPv6 server, a Rebind message will be sent at T1 to request lease renewal
- B. If the DHCPv6 server receives the Rebind message from the client and the server confirms that the client can continue to use the address, it will send a Confirm message to the client to inform the client
- C. The DHCPv6 server sends a Reply message carrying address and configuration information in response to the Request message received from the DHCPv6 client
- D. The DHCPv6 client uses the Solicit message to determine the location of the DHCPv6 server, and the destination IPv6 address of the message is FF02::1:3
Answer: B
NEW QUESTION # 584
In the BGP protocol, if the preconditions are the same, please sort the following route types according to their priority.
Answer:
Explanation:
1) Manual aggregation
2) Automatic aggregation
3) Network
4) Import
NEW QUESTION # 585
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