Huawei H12-821_V1.0-ENU 問題集

質問 1：
On the VRP platform, when we introduce OSPF routing to ISIS, if COST is not specified, the cost value will be set to 16 by default.
A. FALSE
B. TRUE
正解：A

質問 2：
Which of the following descriptions about route introduction is wrong?
A. Import the route into 0SPF, the default is Metric-Type-2
B. The default level of importing routes into ISIS is Level-2
C. When importing a certain type of route into BGP, you can directly specify its MED value without using Route-Policy
D. Different BGP processes in the same device can import routes from each other
正解：D

質問 3：
Which of the following descriptions about the application of RPF in multicast data forwarding is incorrect?
A. If the RPF check fails, it indicates that the source path of the packet is wrong and the packet will be discarded.
B. During the multicast data forwarding process, the multicast router will perform an RPF check on each received multicast data packet through the unicast routing table.
C. The router will compare the incoming interface of the packet with the RPF interface of the RPF route. If they are consistent, the RPF check passes, indicating that the source path of the packet is correct and it will be forwarded downstream.
D. When the router receives a multicast message, it first checks the source address of the message, and then selects an optimal route based on the priority of the routing source. The outbound interface of this route is the RPF interface.
正解：B

質問 4：
RSTP has been improved on the basis of STP, realizing fast convergence of network topology. However, both RSTP and STP are based on a single spanning tree, and there are some shortcomings, such as? (Multiple choice)
A. It will cause some VLAN paths to fail
B. It will shovel the problem of suboptimal path
C. After the link is blocked, it will carry part of the traffic, which will not cause bandwidth waste
D. Unable to achieve load balancing of data traffic in VLAN
正解：A,B,D

質問 5：
Which of the following are the advantages of electing DR/BDR in the MA network? (Multiple choice)
A. Reduce duplicate traffic
B. Facilitate synchronization of link status
C. No multicast packets are needed to maintain neighbor status
D. OSPF neighbor can be established as long as TCP is reachable
正解：A,B

質問 6：
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 () Sub-Options.
正解：
255

質問 7：
In the multicast service model, in order to improve security, ASM can configure filtering policies for group sources on the router to allow or prohibit packets from certain multicast sources from passing through.
A. FALSE
B. TRUE
正解：B

質問 8：
There is a message in the BGP protocol that is periodically sent between BGP neighbors to maintain the neighbor relationship. This message is:
A. Update
B. Keepalive
C. open
D. Hello
正解：B

質問 9：
Stacking: refers to connecting two or more switches to each other through dedicated connecting cables. For example, to connect two switches, you can directly connect the UP stack port of one stack switch to the DOWN stack of another stack switch. ports to expand the number of ports on a single switch.
A. FALSE
B. TRUE
正解：B