Nokia SRC 4A0-101 Question # 6 Topic 1 Discussion

L1 and L2 routers elect separate DIS's.

DIS uses a specific Ethernet multicast address to communicate with other routers on the broadcast network.

If a new router starts up in a LAN and has a higher interface priority, the new router preempts the original DIS and becomes the DIS.

In broadcast multi-access networks, such as Ethernet, one router is elected as the DIS and a second router as the backup DIS.