Alcatel Lucent Interior Routing Protocols and High Availability

IS-IS routers exchange updates by sending UDP packets to a multicast address. ✘ IS-IS routers exchange updates using IP multicast packets. ✘ IS-IS routers exchange updates using Ethernet multicast packets. ✘ IS-IS routers exchange updates by sending packets to the subnet broadcast address. ✔

The system ID ✘ The loopback address ✘ The sequence number of the hello packet ✘ The device that first initiated communication becomes the DIS ✔

4 bytes ✘ 6 bytes ✘ 8 bytes ✘ Variably between 4 and 8 bytes ✔

Area ID Hello and Dead Intervals Stub flag DR and BDR addresses The list of neighbors

Area Border Router ✘ Autonomous System Boundary Router ✘ Designated Router ✘ All routers within an OSPF area. ✔

Priority of 0 ✘ Priority of 1 ✘ Priority of 64 ✘ Priority of 255 ✔

Broadcast Non-Broadcast Multi-Access Point-to-Point Point-to-Multipoint

They are type 7 within the area and are not modified at the ABR ✘ They are type 5 within the area and converted to type 3 at the ABR ✘ They are type 5 within the area and are not modified at the ABR ✘ They are type 7 within the area and converted to type 5 at the ABR ✔

IP packets sent to an IP multicast address. ✘ Ethernet frames sent to an Ethernet multicast address. ✘ IP packets sent to an IP unicast address. ✘ UDP packets sent to an IP multicast address. ✔

RIPv1 and RIPv2 OSPF IS-IS BGP