H12-891_V1.0 Exam Questions

An enterprise purchased dedicated lines from two operators. In order to optimize the line, the enterprise uses the BGP protocol to learn the routing entries of the two operators. H...

iMaster NCE Campus controller does not support device management through SNMP.

Network access authentication can be deployed at different levels of the network according to actual needs. Compared with deploying authentication at the aggregation layer or core...

When configuring the DHCP Relay function on the device, the VLANIF interface that the relay connects to the client must be bound to a DHCP server group, and the bound DHCP server g...

IPv6 over IPv4 uses tunnel technology to transmit IPv6 packets in IPv4 networks to realize island interconnection between IPv6 networks. The source IPv4 address and destination IPv...

/ifm/interfaces/interface is the URL used to identify device management objects in Huawei network equipment OPS (Open Programmability System).

In dual-link hot backup, the AP will establish CAPWAP links with the primary AC and backup AC.

The AOC (Agile Open Container) function of iMaster NCE does not support the management of third-party equipment and can only manage Huawei equipment.

HTTP messages are divided into two types: request messages and response messages. The syntax format of the HTTP request message is as follows: <version><method><request URL> <heade...

The figure below shows the MPLS VPN cross-domain option B solution. In the scenario where RR exists in the domain, PE1 and ASBR-PE1 both establish VPNv4 neighbor relationships with...

The path of the SR-MPLSTE tunnel can be calculated by the controller or the tunnel head node.

If the K bit in the GRE message header is 1, GRE will insert a four-byte long "keyword" field in the header, and the sender and receiver will authenticate based on the GRE keyword.

A certain campus deployed IPv6 for business testing. In the early stages of deployment, engineers wanted to achieve network interoperability through IPv6 static routing. When creat...

In an MPLS domain, LSRs can be divided into Ingress LSR, Transit LSR and Egress LSR according to their different data processing methods. For the same FEC, a certain LSR can be the...

By default, VRP requires manual operation to resend an Update message to the neighbor after the BGP neighbor's egress routing policy (route policy) changes.

The enterprise wide area network connects the enterprise headquarters and branches, enterprises and clouds, and also realizes interconnection between clouds.

When the client calls the iMaster NCE-Campus login authentication RESTful interface, the method used is POST, and the request message body format is <"username":"xxx", "password":...

OSPFv3 Link LSA will be propagated throughout the area

BGP4+ carries the next hop address of IPv6 routing through the Next_Hop attribute in the Update message.

In the DU label distribution mode, if the Liberal retention mode is used, the device will retain the labels distributed by all LDP Peers, regardless of whether the LDP Peer is the...

As shown in the figure, the stateful inspection firewall will forward the packet because the packet conforms to the firewall session state.

On the same device, congestion avoidance is better than congestion management.

In the MPLS L3 VPN cross-domain Opti on B solution, the ASBR must turn off the RT filtering function, otherwise it will not be able to deliver any VPNv4 routes.

When two BGP neighbors support different BGP versions, the neighbors will negotiate to use the highest BGP version that both ends can support.

When policy linkage is deployed in the campus network, a CAPWAP (Control and Provisioning of Wireless Access Points) tunnel will be established between the control point and execut...

SRLB is a user-specified set of local labels reserved for SR MPLS. These labels are configured locally and are only valid locally, so they will not be published externally through...

NVE is a network entity that implements network virtualization functions and can only be hardware switches.

SSH connections are usually established on TCP/IP connections, and in rare cases they can be established on UDP connections.

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

As shown in the figure, all routers in the figure run the OSPF protocol. Because R3 is in the backbone area, there are no Type 3 LSAs in the LSDB of R3.

In the MPLS network, LSRs running the LDP protocol exchange LDP messages to implement functions such as neighbor discovery, session establishment and maintenance, and label managem...

() TWAMP (Two-ay Active Weasurement Protocol, Two-way Active Measurement Protocol) is used to measure IP performance such as two-way delay, jitter, and packet loss rate between two...

LLDP (Link Layer Discovery Protocol) is the link layer discovery protocol defined in IEEE 802. lab. Because it works at the data link layer, it cannot obtain the neighbor's managem...

OSPF runs directly on the TCP protocol and uses TCP port number 179.

In order to isolate communications between wired user terminals, port isolation can be enabled on the access switch; however, for wireless users, the AP cannot implement user isola...

The deployment of port isolation technology in Ethernet can realize layer 2 interoperability and layer 3 isolation, making the network more flexible.

The difference between SRv6 and SRMPLS is that the Segment in SRv6 SRH will not pop up after being processed by the node, so the SRv6 header can be used for path backtracking.

GRE tunnel can carry not only IPv4 unicast, multicast, and broadcast packets, but also IPv6 unicast, multicast, and broadcast packets.

iMaster NCE-WAN controller is the core of Huawei's SD-WAN solution and is mainly responsible for the management and service orchestration of the SD-WAN network.

In Huawei's SD-WAN solution, the CPE needs to establish a control channel before it can be managed by the iMaster NCE-WAN controller.

From the user's perspective, any phenomenon that affects business can be defined as a fault.

GRE is a Layer 2 tunnel encapsulation technology that can be used to solve the problem of interconnection between enterprise branches and headquarters.

In the scenario of dynamically establishing a VXLAN tunnel through BGP EVPN, BGPEVPN carries the Router MAC of the VTEP through the extended community attribute EVPN Router's MAC E...

Traffic shaping technology will temporarily cache data that exceeds the forwarding threshold. For data in the cache, congestion management technology can be used to discard data pa...

In the MPLS L3VPN inter-area Option C solution, if there is an RR, and the primary hop address is not modified when the RR reflects VPNv4 routes to its neighbors, the RR cannot tra...

The ipv6 enable topology standard is configured in the IS-IS protocol view. The meaning of this command is that IPv4 and IPv6 share the same topology.

When the administrator creates a policy control matrix, when a source security group has policies for multiple destination groups, the matching order of different policies needs to...

MAC address learning of static VXLAN tunnels relies on packet interaction between hosts (such as ARP packet interaction).

When the ARP distributed gateway is enabled under the VBDIF interface of the VTEP, VETP will still retain the ARP information of the host under the remote VTEP.

The Router ID of OSPFv3 needs to be configured as a 128-bit length dotted decimal system.