H12-821_V1.0 Exam Questions

When the forwarding table entry is stored in the main control board, after the packet enters the interface board, the query and forwarding of the packet can be completed directly o...

By default, the Level of the IS-IS router interface is 1evel-2.

When BGP establishes a peer connection, both this segment and the peer end will initiate a TCP three-way handshake, so two TCP connections will be established, and then one connect...

There can be multiple nodes under one Route-Policy, and the device starts matching in order when calling Route-Policy.

The main function of MBGP is to help perform RPF verification of cross-domain multicast flows.

IPv6 address 2001:FC1A:8BAD:0112:0000:1200:0000:0001/64 is abbreviated to 2001:FC1A:8BAD:112:0:1200::1/64

In the WLAN network, when HSB backup group is enabled, if the AP has gone online on the primary AC and then the AP information is added offline on the secondary AC, the AP status o...

Similar to OSPF, the two routers establishing a BGP peer relationship must be directly connected.

If OSPF is in the ExStart state, routers and neighbors send DD messages containing link status information digests to each other.

When Filter-Policy is deployed in OSPF, Filter-Policy will modify the LSDB of OSPF.

When multiple ASBRs introduce the same external route into the same OSPF domain, use the external route type with metric-type 2 to avoid suboptimal paths.

IPv6 uses segmented extension headers to improve QoS processing efficiency of IPv6 packets.

If you want to achieve communication between different protocols, you can only use route introduction.

Compared with other routing protocols, the use of multi-region and hierarchical network design can speed up route convergence, reduce the load of devices in a single area, and make...

When BGP uses Filter-Policy, you can use the filter-policy export command to filter the routes published externally. Only routes that pass the filtering can be added to the BGP loc...

As shown in the figure, R1 and R2 run OSPF, and the two routers can establish an adjacency relationship.

The (*, G) routing table entry in multicast routing can guide packet forwarding.

In IGMPv2, the querier can send query messages to a specified multicast group in the shared network segment to query whether there are members in the multicast group.

In the dual-homing networking scenario, in VRRP dual-machine hot backup, only the primary AC is responsible for business operation. When the primary AC fails, the backup AC will ta...

BGP Path attributes in BGP are attributes that all BGP routers must recognize and be included in Update messages.

IS-IS overload flag refers to the OL field in the LSP message. After setting the overload flag on a device, other devices will not use this device for forwarding when calculating S...

When filter policy is used in OSPF, routing control can be achieved by filtering LSAs.

The prefix list can be used directly through the peer command in deploying BGP without passing Filter-Policy or Route-Policy.

For the same multicast source, the device can determine the only multicast traffic incoming interface on the device through RPF inspection.

As shown in the figure, all three switches run RSTP, and the STP priority of ST2 can be configured as 2000 to make it a root bridge. BID: 32768.0c-00-0d-0a-00-01 BID: 32768.0c-00-0...

By default, the time interval for sending PIM Hello messages on the router interface is () seconds.

When configuring the multicast routing protocol, you first need to execute the () routing-enable command, and then perform related configurations of the PFM protocol.

Please compress the address 2001:0DB8:0000:C030:0000:0000:09A0:CDEF. ()

A ip-prefix list1 index 10 permit 10.1.0.0 24 greater-equal () less-equal 32 means that the first 24 bits of the matching network address are the same as 10.1.0.0, and the network...

R1, R2, R3, and R4 run IS-S. The DIS Priority of their interfaces is as shown in the figure. If the devices are started at the same time, () is elected as DIS.

BGP prefers the route with the best Origin attribute value. The value of the Origin attribute is: EGP, IGP, ().

BGP uses the () message to revoke routing entries.

Execute the saved-configuration command to clear the contents of the configuration file used for the next startup of the device, and unspecify the configuration file used for the n...

If roaming is implemented between two APs, the same security policy, forwarding mode and the same () must be met.

The relationship between various rules in MOC traffic classification is divided into: and or or, the default relationship is ()

Option 82 in the DHCP message is called the relay agent information option, and the administrator can obtain a lot of client information from it. Option 82 can contain at most () S...

Set the interface GE1/0/1 to the trust security zone on the Huawei firewall. At this time, the GE1/0/1 interface belongs to the () security zone.

BGP prefers the route with the best Origin attribute value. The Origin attribute value is: (), IGP, Incomplete.

In the active-standby, negotiation of dual-link dual-device hot standby, the AP collects and compares the parameters carried in the () message responded by the active and standby A...

The BFD sending interval of BFD packets is _____ milliseconds, the receiving interval is _____ milliseconds, and the local detection is _____ times.

As shown in the figure, router R has static routes to three network segments of Site A, Site B, and Site C respectively. The administrator needs to configure to import the routes o...

In PIM-DM, multicast data will be diffused across the entire network periodically (default ____ seconds). The main purpose of periodic diffusion is to detect whether new group memb...

For single-arm BFD detection modes, in ____ mode, the local end sends BFD control packets according to a certain transmission cycle. The detection location is the remote end. The r...

In BGP, MED is mainly used to affect BGP route selection between ASs. The smaller the MED attribute value, the better the BGP route. By default, the BGP MED of all Huawei equipment...

____ refers to a collection of devices that are managed by the same organization and use a unified routing strategy.

As shown in the figure, a sham link is established between PE1 and PE2 through the Loopback0 interface. CE2 can learn the route of the 192.168.1.0/24 network segment (direct route...

Referring to the BGP group output provided, what is the Remote AS?

Information shown in the figure is performed to filter all received routes. Assume that there is a BGP route with the AS-Path attribute [100 200 300 400] on R1 that needs to be sen...

In Huawei, the command ___, users on different ports in the same VLAN can be completely isolated at Layer 2 and Layer 3 and unable to communicate.

In OSPFv3, LSAs whose propagation range is an area have __ class.