Free Huawei H12-821_V1.0 Exam Questions

On an OSPF network, an algorithm is used to prevent loops within an area, but loops may occur between areas. Therefore, OSPF defines a loop prevention mechanism for inter-area routes. Which of the following statements are true about the loop prevention mechanism?

Similar to the OSPF DR, the IS-IS DIS needs to be elected on a broadcast network. However, the OSPF DR is preemptive by default, whereas the IS-IS DIS is not preemptive by default. 

On an OSPF network, one router with P2P as the network type is directly connected to another router with P2MP as the network type. If the Hello intervals on the two routers are changed to be the same, neighbor relationship establishment and LSDB synchronization are not affected. 

On Huawei switches, which of the following planes provides network information and forwarding entries that are mandatory for data plane forwarding?

IP multicast effectively conserves network bandwidth and reduces network load. Therefore, it is widely used in network services, such as IPTV, real-time data transmission, and multimedia conferencing.