H12-891 Web TestEngine demo

Select all that apply.

• A

  IS-IS elects a Designated Intermediate System (DIS) using priorities, and if priorities are equal, it compares MAC addresses

• B

  In a broadcast multi-access network, the DIS sends Hello PDUs (Protocol Data Units) at three times the frequency.

• C

  The DIS ensures database synchronization by periodically sending Complete Sequence Number PDUs (CSNPs).

• D

  The DIS supports a preemption function, and after a new DIS is successfully preempted, there is no need to flood any LSP (Link State PDU) packets.