Get Mar-2026 Download Latest & Valid Questions For Huawei H12-891_V1.0 exam [Q91-Q107]

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Get Mar-2026 Download Latest & Valid Questions For Huawei H12-891_V1.0 exam

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QUESTION 91
The default configured switch has an empty MAC address table at this time , and Host A connected to the switch issues the first unicast data frame, so what will the switch do after receiving the teaching system?( Single choice questions).

The switch will drop the data frame

The switch records the source MAC address of the data frame and floods the data frame

The switch will forward data to interface

based on the mesh MAC address of the data frame The switch caches the data frame and waits for the destination host to send the effect frame before forwarding it

QUESTION 92
In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following fields is NOT carried in BGP EVPN Type 5 routes?

Route Distinguisher

MAC Address

GW IP Address

IP Prefix Length

QUESTION 93
The Path Selection tool can define multiple entries, which of the following tools will automatically generate a rejection of any entries at the end of the slot

Community -filter

IP-prefix

Route policy

AS-Path- filter

QUESTION 94
NETCONF provides a set of mechanisms for managing network devices. NETCONF operations take place on a configuration datastore of network devices. Which of the following statements is incorrect about the configuration datastore?

The configuration datastore of network devices can be classified into the candidate, running, and startup configuration datastores.

The <delete-config> operation is oriented at the startup configuration datastore.

The <validate> operation is oriented at the candidate configuration datastore.

The <commit> operation submits the configuration in a startup configuration datastore to a running configuration datastore.

QUESTION 95
IPsec uses an asymmetric encryption algorithm to encrypt the symmetric algorithm key, which it uses to encrypt/decrypt data, ensuring security and performance.

TRUE

FALSE

QUESTION 96
What is the relationship between CIR, BC, and TC?

CIR=TC/BC

CIR=BE/TC

TC=CIR/BC

TC=BC/CIR

QUESTION 97
The BSR/RP mechanism described below describes the correct determination ?( Multiple choice questions).
There can be multiple C-BSRs in the

PIM-SM domain, but only one BSR can be elected.

BSR collects C-RP information by receiving packets of C-RP

BSR advertises BSR and C-RP information to all routers in the PIM-SM domain via flood bootstrap messages

A C-BSR can also collect C-RP information by receiving C-RP packets

QUESTION 98
The following about the Router-LSA of OSPFv3 is correct?( Single choice questions).

The router-LSA data area contains the Link-Local address

The router-LSA data area contains the Interface ID of the neighbor on this side

Similar to OSPFv2, the Option field exists in the header of LSA, not in the data area of Router-LSA

When LS type= Ox0001 in the head of LSA, the data area representing LSA is Router-LSA

QUESTION 99
In Huawei SD-WAN Solution, which of the following tunneling technologies is used to establish data channels?

WLAN

IPsec

MPLS

GRE over IPsec

QUESTION 100
gRPC (Google Remote Procedure Call)is a language-neutral, platform-neutral, and open-source remote RPC system that supportsunary RPCs and streaming RPCs.
Which of the following service methodsare NOT supportedby gRPC?

rpc Subscribe(SubsArgs) stream returns(SubsReply) {};

rpc dataPublish(stream serviceArgs) returns(stream serviceArgs) {};

rpc stream LotsOfGreetings(HelloRequest) returns (HelloResponse) {};

rpc Cancel(CancelArgs) returns(CancelReply) {};

QUESTION 101
During the configuration of L3VPNv4 over SRv6 BE, if an RR is deployed in the SR domain, which command must be run on the RR to ensure that the PEs at both ends can correctly learn VPNv4 routes?

QUESTION 102
Which of the following statements regarding OSPF neighbor relationship faults is incorrect?

For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.

The Init state indicates that the router has received Hello packets from its neighbors, but the received Hello packets do not contain the OSPF RID of the receiving router.

The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).

The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.

Understanding OSPF Neighbor States
OSPF (Open Shortest Path First) establishes neighbor relationships through several states:
1##Down:No Hello packets received.
2##Init:Routerreceives Hello packetsbutits own Router ID is missingin the received packets.
3##2-Way:Routerssee each other in Hello packets. (Stable state for non-DR/non-BDR routers).
4##ExStart:Routersstart exchanging LSAsbut may faceMTU mismatches.
5##Exchange:Routers sendDatabase Description (DBD) packetsto synchronize link-state databases.
6##Loading:Routers exchangeLink-State Requests (LSRs) & Updates (LSUs)to fully sync.
7##Full:Routers are fully synchronized.
Analysis of the Answer Choices
#A. For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.
Correct:Non-DR/Non-BDR routers remain in2-Way statesince they don’t need to form full adjacency.
#B. The Init state indicates that the router has received Hello packets from its neighbors, but the received Hello packets do not contain the OSPF RID of the receiving router.
Correct:If an OSPF router receives a Hello butdoes not see its own Router ID, it stays in theInit state.
#C. The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).
Correct:If MTUs mismatch or RIDs conflict, theDBD exchange fails, causing routers to remain inExStart state.
#D. The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.
Incorrect:
InAttempt state, routerssend unicast Hello packetsto manually configured neighbors (common inNBMA networks).
If no Hello responses are received, they remain inAttempt state, but theyDO send Hellos.
Real-World Application
OSPF Troubleshooting:Identifying routers stuck inInit or ExStart statescan point toMTU mismatches or neighbor misconfigurations.
NBMA Networks (Frame Relay, DMVPN):Manually configured neighbors may stay inAttempt state if Hello packets are lost.
#Reference:Huawei HCIE-Datacom Study Guide – OSPF Neighbor States & Troubleshooting

QUESTION 103
When configuring AS-Path-Filter, ip as-path-filter 10 permit_100$ indicates a matching route received from the A5100 but not from the AS100

TRUE

FALSE

QUESTION 104
Which of the following statements regarding OSPF neighbor relationship faults is incorrect?

For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.

The Init state indicates that the router has received Hello packets from its neighbors, but the received Hello packets do not contain the OSPF RID of the receiving router.

The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).

The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.

Understanding OSPF Neighbor States
OSPF (Open Shortest Path First) establishes neighbor relationships through several states:
1## Down: No Hello packets received.2## Init: Router receives Hello packets but its own Router ID is missing in the received packets.3## 2-Way: Routers see each other in Hello packets. (Stable state for non- DR/non-BDR routers).4## ExStart: Routers start exchanging LSAs but may face MTU mismatches.5## Exchange: Routers send Database Description (DBD) packets to synchronize link-state databases.6## Loading: Routers exchange Link-State Requests (LSRs) & Updates (LSUs) to fully sync.7## Full: Routers are fully synchronized.
Analysis of the Answer Choices
# A. For non-DR and non-BDR routers on an Ethernet link, the 2-Way state is acceptable.
* Correct: Non-DR/Non-BDR routers remain in 2-Way state since they don’t need to form full adjacency.
# B. The Init state indicates that the router has received Hello packets from its neighbors, but the received Hello packets do not contain the OSPF RID of the receiving router.
* Correct: If an OSPF router receives a Hello but does not see its own Router ID, it stays in the Init state.
# C. The ExStart state indicates that two neighbor routers have inconsistent MTUs or the same OSPF Router ID (RID).
* Correct: If MTUs mismatch or RIDs conflict, the DBD exchange fails, causing routers to remain in ExStart state.
# D. The Attempt state indicates that the router does not send unicast Hello packets to configured neighbors.
* Incorrect:
* In Attempt state, routers send unicast Hello packets to manually configured neighbors (common in NBMA networks).
* If no Hello responses are received, they remain in Attempt state, but they DO send Hellos.
Real-World Application
* OSPF Troubleshooting: Identifying routers stuck in Init or ExStart states can point to MTU mismatches or neighbor misconfigurations.
* NBMA Networks (Frame Relay, DMVPN): Manually configured neighbors may stay in Attempt state if Hello packets are lost.
# Reference: Huawei HCIE-Datacom Study Guide – OSPF Neighbor States & Troubleshooting

QUESTION 105
As shown in the figure, an engineer uses four routers to test the interoperability of branch networks, where R1, R2, and R3 in branch 1 deploy OSPF Network interoperability is implemented, and R, R3, R4 in Branch 2 is deployed is-IS to achieve network interoperability. Now that the engineer wants to implement R1 access to R4’s loopback address, which of the following actions will meet this requirement?

No configuration is required

Publish default routes only in the OSPF process for R2

In the OSPF process of R2 and the IS-IS process, the default routes are published separately

Publish the default route only in the IS-IS process of R2

QUESTION 106
As shown in the figure, a sham link is established between PE1 and PE2 through the loopback interfaces. CE2 can learn the 192.168.1.0/24 route (directed route on CE1) through the sham link and backdoor link. If other parameters use their default settings, the cost of the 192.168.1.0/24 route on CE2 should be ______. (Enter an Arabic numeral without symbols.)

QUESTION 107
A router Router LSA is shown in the figure below, and the following statement is incorrect?

This router is a DR

This router has established an adjacency relationship

This router supports external route ingestion

The Router ID of this router is 1001

Huawei H12-891_V1.0: HCIE-Datacom V1.0 exam covers a wide range of topics related to data communication. H12-891_V1.0 exam includes topics such as network planning and design, network implementation and management, routing and switching, network security, and network troubleshooting.

Exam Materials for You to Prepare & Pass H12-891_V1.0 Exam: https://www.passleadervce.com/Huawei-Certified-ICT-Expert/reliable-H12-891_V1.0-exam-learning-guide.html

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