H12-891 Online Practice Questions and Answers

Which of the following messages does the BGP protocol support?

A. Update

B. Open

C. Hello

D. Keepalive

In an Hw IP multicast network--which of the following multicast features are associated with (*, G) table entries? ( Multiple select)

A. Dense mode

B. Source tree

C. Sparse mode

D. PIM bidirectional E. Share the tree

E. Dense Tree

In the multi-level RR scenario, the first-level RR will be connected to a large number of second-level R, which may cause the BGP circuit of the first-level RR to overflow from the table Risk of R BGP routing table overflow?( Radio).

A. ORF

B. Route Control C. Route Aggregation

C. Set the same Cluster-ID

What messages can Huawei equipment suppress traffic for?

A. Multicast

B. Known unicast

C. Broadcast

D. Unknown unicast

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).

A. The switch will drop the data frame

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

C. The switch will forward data to interface

D. 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

In PIM-SM, the description of RP is incorrectly ?

A. All members of the group and the multicast sources that send multicast data to the group converge to the unique RP

B. The initial multicast streams for all groups in the shared tree are forwarded to the receiver via RP

C. An RP can serve multiple multicast groups at the same time, a multicast group can correspond to multiple RPs

D. RPs can be responsible for the forwarding of several or all multicast groups, and there can be an RP in

the network

View the details of all VPN instances on a network device and the results are as follows, which of the following statements is wrong?( Multiple choice questions).

A. The total number of instances that enable the IPv6 address family in the VPN configured on this side is

1 .

B. VPN-Instance vpna does not receive VPN routes with an RT of 2:1.

C. The GigabitEthernet 1/0/0 interface is tied to the VPN-Instance vpna

D. The device assigns a label to each route of the VPN-Instance vpna.

The following topology diagram is available, and it is correct to analyze the following statement accordingly A. There are route entries for 10022/32 and 10000/16 in the IP routing table for AR1

B. R1's IP routing table has both 10033/32 and 10000/16-bit route entries

C. Because R does the route aggregation, R1 Only route entries of 10000/16 exist in the IP routing table

D. There are route entries for 10022/32 and 10033/32 in the IP routing table for R1

What are the reasons why the BGP connection is down after it is successfully established ? ( Single choice questions) Single choice

A. The wrong BGP packet was received.

B. The mandatory attribute in the route update packet is missing.

C. Open message negotiation failed.

D. After the BGP connection is established, the keepalive message is not received within the negotiated holdtime time.

Which of the following are used in Ethernet?

A. A MAC address in a non-canonical format

B. CSMA/CD in multiplexed interviews

C. Mac address in canonical format

D. D. 8025 encapsulated frames

E. 8023 Encapsulated Frame