H12-821_V1.0-ENU 無料問題集「Huawei HCIP-Datacom-Core Technology V1.0」

（A）Delete your own AS number in AS_Path and forward it.

（B）Discard directly

（C）Forward directly to the peer

（D）First notify the neighbor through a Notification message, and then discard the route.

（A）The VRRP backup group monitors common BFD and when the BFD state changes, it will change the master/standby state by modifying the priority of the backup group. When the monitored BFD session state recovers, the priority of the router in the backup group will be restored to original value

（B）A VRRP backup group cannot monitor Peer BFD, Link BFD and Normal BFD at the same time

（C）If multiple BFDs are configured to monitor at the same time, each configuration is related to each other and may affect each other

（D）Use VRRP to monitor the BFD session or EFM function. After the BFD session or EFM session status changes, the VRRP module will be notified to realize VRRP fast switching

（A）It may be caused by interface verification and coordination errors

（B）Errors that may be caused by the HELLO time interval

（C）An error may be caused by a subnet mask mismatch

（D）It may be an error caused by a mismatch in the area code

（A）FALSE

（B）TRUE

（A）Backup device does not respond to ARP requests for virtual IP addresses

（B）The Backup device does not process packets whose destination IP address is a virtual IP address.

（C）When the Backup device receives a VRRP packet with a priority of 0, it will immediately switch to the Master device.

（D）When the Backup device receives the VRRP message from the Master device, it does not perform any processing.

（A）After deploying strict mode URPF, you can also deploy it at the same time to allow matching the default routing mode.

（B）If you deploy loose mode URPF, no detailed route matching is required by default.

（C）If you deploy URPF in loose mode, if you need to check the default route, you need to check whether the interface matches

（D）If strict mode URPF is deployed, as long as the packet can match the detailed route, the P address can be deemed legitimate and the packet can be forwarded.

（A）Option 82 is called the relay agent information option, which records the VLAN ID of the switch port connected to the DHCP client

（B）Option 82 does not contain the MAC address of the relay device

（C）The Options field consists of three parts: Type, Length and Value

（D）Option 82 can contain up to 256 Sub-Options

（A）Legality of IGMP Report messages

（B）The receiver host only supports the IGMPv2 protocol, but the SSM multicast model is used in the network

（C）Solve the problem of broadcasting multicast data packets on Layer 2 devices, and use them to manage and control the forwarding of multicast data packets

（D）There are many receiver hosts on the network segment, and the router will receive many IGMP Report messages.

（A）Support multiple implementation methods to meet the different needs of users

（B）It can quickly locate the fault, reaching the fault location speed of second level or even sub-second level

（C）The number of managed devices is small, but the accuracy is high, suitable for small and medium-sized networks

（D）The accuracy of data collection is high, and the types of items are very rich, fully reflecting the network status

（A）The Router ID of this router is 1.1.1.1

（B）The router is the Master

（C）The neighbor's Router ID is 2.2.2.2

（D）The address of DR is 10.1.1.1

（A）The device interconnection port of the downstream link quickly enters the Forwarding state through the P/A mechanism

（B）The edge port of SW3 will immediately enter the Forwarding state after a round of P/A mechanism

（C）When the network is initialized, the ports of all the switches in the figure are designated ports and are in the Discarding state

（D）The upstream link port of SW2 will immediately enter the Forwarding state after receiving the RSTBPDU with the Proposal bit set from SW1.