Free Huawei H12-891 Practice Questions & Answers 2026 Part2 | HCIE-Datacom

The following description of CBWFQ is correct?

The following message about OSPFV3 is correct?

The following description of the characteristics of multi-instance CE is ?

As shown in the figure, three switches S1, SW, and SN3, where SWI is the root bridge, andlink congestion occurs between SI and SW2, SWD cannot receive the configuration BPDU sent by the root bridge, which spanning tree protection mechanism does the administrator need to configure to prevent the problem caused by link congestion?( Single choice questions).

On the network shown in the figure, OSPF-based SR-MPLS TE is enabled on all routers. Which of the following adjacency labels are allocated by P3?

In RSTP , which port provides a backup path to reach the root node of the spanning tree? What state is the port in?

Which of the following messages does the BGP protocol support?

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

The following description of Filter-Policy is correct?( Radio).

IPV6 multicast introduces the concept of multicast scope, which of the following ways is the multicast scope concept implemented? Multi-select

In the description of the MAC address spoofing attack, the error is ? Radio

In different scenarios, RSTP provides different protection functions, and the wrong statement about this statement is

When a Layer 3 switch sends IP packets originating from one VLAN to another LAN, which field in the following options is overridden?( Single choice questions).

In a VXLAN network, traffic is connected to the VXLAN network, and it can also be used to communicate with the same subnet within the same XLAN network

Huawei's two switch SWA, SWB is connected together through 7 Ethernets, and static route aggregation is configured, and the corresponding ports on the switch SWA are E1/0/1, E1/02, E1/0/3, E1/0/4, E1/ 0/5, E1/0/6, E1/0/7, configured sequentially as if switch SWA, SWB Each aggregation group supports only 6 ports.

The following statement about the Security Alliance SA in IPSec is wrong with ?

The following description of the attributes of BGP is correct?( Single choice questions).

IPV6 multicast introduces the concept of multicast scope, which of the following ways is the multicast scope concept implemented? Multi-select

Which of the following statements is incorrect about the user authentication points on the network?

In the firewall hot standby scenario, heartbeat interfaces can be connected directly or through an intermediate device such as a switch or router.

In VXLAN scenarios, what features can be turned on to reduce flooding of ARP messages between VTEPs?( Multiple select).

: :1/128 is the IPV6 loopback address

To implement the traffic filtering function, you can use trapp-filter or MQC, which can be called in more views than traffic-filter

If the receive cache of a switch's gigabit Ethernet interface is full, what protocol does the switch use to know that the remote interface delays sending data frames for a period of time?

Is the following description of ospf virtual links correct?

A VRRP virtual router configuration VRID is 3 and the virtual IP address is 100 1. 1. 10, so what is the virtual MAC address?

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?

As a network administrator, which of the following protocols can I use for network device configuration?

After BGP introduces routes for other protocols, the next hop in the BGP routing table is consistent with the next hop of the introduced routing protocol

Huawei Open Programmability System (OPS) provides openness and programmability capabilities for network devices and enables users to perform secondary development. To facilitate script completion, Huawei OPS provides the Python script template in which the OPSConnection class is created. The member function for creating device resources is def post(self, uri, req_data).

OSPF is deployed on a campus network to implement network interconnection. The LSDB of R2 is shown in the figure. What can be determined from the LSDB? To analyze this question, let's break down the key concepts and the given LSDB (Link State Database) information from the figure: Understanding the LSDB Output: The output shows the OSPF LSDB on R2 with Router ID 10.1.123.2. Area 0.0.0.0 (Area 0) is displayed along with several Link State Advertisements (LSAs) including Router LSAs, Network LSAs, and Summary LSAs. Area 0.0.0.1 (Area 1) also displays Router LSAs and a Type 7 LSA (NSSA LSA) with Link-State ID 0.0.0.0. An External LSA (Type 5) with Link-State ID 0.0.0.0 and AdvRouter 10.1.123.2 is also present. Analysis of Each Option: Option A: Area 1 is an NSSA. Correct. The presence of a Type 7 LSA (NSSA LSA) in the database indicates that Area 1 is configured as an NSSA (Not-So-Stubby Area). NSSA allows the injection of Type 7 LSAs for external routes while blocking Type 5 LSAs from entering the area. Option B: R2 translates Type 7 default route into Type 5 default route. Correct. In an NSSA, if an ABR (like R2) has the NSSA ASBR capability, it will convert Type 7 LSAs to Type 5 LSAs before injecting them into the backbone area (Area 0). In the LSDB, we see both a Type 7 LSA (NSSA) and a corresponding Type 5 External LSA, confirming that R2 performs this translation. Option C: R2 advertises the default route in the OSPF process. Incorrect. There is no indication that R2 itself is originating the default route. The Type 7 LSA in Area 1 and the Type 5 LSA in Area 0 only indicate translation from another source, not R2 advertising it directly. Option D: Area 1 does not have Type 3 LSAs. The possible cause is that R2 filters Type 3 LSAs in the outbound direction of Area 1. Incorrect. In an NSSA area, Type 3 LSAs (Inter-Area Prefix LSAs) are typically not generated for external routes. The absence of Type 3 LSAs in Area 1 is due to the nature of NSSA itself rather than any filtering configured on R2. Huawei HCIE-Datacom V1.0 Training Materials Huawei Official Documentation: OSPF Configuration Guide Huawei OSPFv3 Configuration Guide RFC 3101 - The OSPF Not-So-Stubby Area (NSSA) Option HCIE-Datacom Knowledge Base: OSPF Advanced Concepts ===========

There are many ways to establish a cluster on a box switch, what methods does Huawei frame switch support to establish a cluster?

Off-stem cross-domain VPN-Option B scenario, the following description is incorrect?

What are the following correct statements about MUX VLANs?( Multiple select).

A multi-protocol network, the topology is shown in the figure. Take a closer look at the topology, router R4 (in Areal) is introduced into the OSPF process via the routes learned by BGP. So what categories of LS4 will R3 advertise to zone 0?( Multiple choice questions).

What are the types of link types included in OSPF's route LSA?

ISIS elects DIS in broadcast multiplexed access networks, and the following statement about DIS is correct?( Multiple choice)

Although the STP protocol can solve the loop problem, it affects the quality of user communication due to the slow convergence of the network topology. RSTP has made many improvements to STP, which of the following is not an improvement of RSTP to STP?

The DHCP protocol assigns to clients--some TCPIP-related parameter information--in the process DHCP defines a variety of messages that are encapsulated at the transport layer :(sortic).

In RSTP , which port provides a backup path to reach the root node of the spanning tree? What state is the port in?

In order to reduce the number of OSPF routes in certain areas, the OSPf protocol has developed special area functions, and the following description of the characteristics of OSPF special areas is correct

A lot of overwave techniques have emerged in the process of replacing the IPV4 addresses used in the network with lP6 addresses. These technologies are divided into two categories, one is IP4IPV6 coexistence technology, the other is PA/IP>6 interoperability technology, which of the following options sleep in IPv4/IPv6 coexistence technology?

The following description of the characteristics of multi-instance CE is ?

The display current-configuration command displays the running configurations in memory.

The following statement about the NSSA area is correct (multiple choice).

Router HW enables OSPF and router HW has the role of ABR and is configured with abr- summary, then which class LSA Will it be aggregated?

As shown in the following figure, a part of the LSDB LSDB of a router LSDB is shown in the first one in the following figure. A new LSP has been received, the second one in the figurebelow, and the following statement is incorrect (single choice).

SSH must be configured before you can enable NETCONF on Huawei network devices.

When a Layer 3 switch sends IP packets originating from one VLAN to another LAN, which field in the following options is overridden?( Single choice questions).

MSTP switches treat RSTP switches as MSTP domains, MSTP, which are formed by a single switch The interchange resolves the RSTBPDU to MSTBPDU, where IRPC is 0

The most effective way to view device warnings through the CLI is ?

Which of the following DNS resource records are legitimate?

LDP and IGP linkage refers to the release of IGP and TD routes to ensure that LDP and IGP linkage complete network efficiency, so that KGP and LDP maintains a consistent path, minimizing traffic loss, thereby improving the reliability of the entire network.

After configuring the VLAN-based MAC address drift detection function, if the MAC address drifts, you can configure the actions of the interface according to your needs. Which of the following is not a configurable action?

The following statement about the Security Alliance SA in IPSec is wrong with?

If the receive cache of a switch's gigabit Ethernet interface is full, what protocol does the switch use to know that the remote interface delays sending data frames for a period of time?

For Layer 2 VPN technology, the following statement is correct? Multi-select

How do 8021w and 8021D handle BPDUs?( Confirmed) The

: :1/128 is the IPV6 loopback address

In different scenarios, RSTP provides different protection functions, and the wrong statement about this statement is

There is an As-path-filter.ip as-path-filter 1 permit*(100l400) $, which As-path-filter can match which of the following AS_PATH Attribute?( Confirmed).

BGP routing policies can control the publication and acceptance of routes

Which of the following commands needs to be run in the BGP view to enable a VPN instance to advertise IP routes to the BGP-EVPN address family? In BGP EVPN configuration for VXLAN-based networks, Huawei uses the command: [bgp] advertise l2vpn evpn This command enables the BGP process to advertise routes from a VPN instance into the EVPN (L2VPN) address family, which is used for VXLAN control-plane operations like MAC/IP advertisement. Option A (advertise irbvfi) --- invalid command. Option B (advertise vpnv4) --- used for MPLS VPNs, not EVPN. Option C (advertise irb) --- not a recognized Huawei command. Option D is the correct and officially used command. Correct answer: D. advertise l2vpn evpn

What are the types of link types included in OSPF's route LSA?

SR is a technology that forwards data packets based on source IP addresses.

Firewall security policies have the condition for traffic matching to be ?( Multi-select)

For Layer 2 VPN technology, the following statement is correct? Multi-select

The following statement about IS-IS (IPv6) is correct?

The following statement about the Security Alliance SA in IPSec is wrong with ?

Between two directly attached devices that have established an IBGP neighbor, execute the shutdown command to close the interface of one of the devices. The BGP connection is not immediately disconnected.

In a VXLAN network, traffic is connected to the VXLAN network, and it can also be used to communicate with the same subnet within the same XLAN network

When DLDP detects the presence of a one-way link in the fiber, the default actions of Huawei equipment include: the DLDP state machine migrates to the Disable state, outputs Trap information, and automatically sets the interface to a blocked state.

OSPF fast convergence is an extended feature to improve the convergence speed of routing, in which PRC works by speeding up routing computation by performing path calculations only on the affected nodes when the network topology changes.

The following statement about static VXLAN tunnel configuration is correct?

A switch joins a running stacking system after powering up, a behavior known as heap overlay.

The following description of the attributes of BGP is correct?( Single choice questions).

The following about BGP routing, describing the error, is ?

The following description of Filter-Policy is correct?( Radio).

ISIS elects DIS in broadcast multiplexed access networks, and the following statement about DIS is correct?( Multiple choice)

Router HW cannot access hosts in the remote network, router HW runs routing protocols and only pings the remote file server address 105401 on router HW with extensionsthrough a default route remote network , the result of ping on the router HW is rendered as 'requ.' est time out', according to the above description, the error in the following analysis is ?