Day 24

1. By default, all OSPF routers have a default priority value of __.

2. You configure the below network on the router using OSPF. What will happen?

Router(config)#router ospf 1
Router(config-router)#network 10.0.0.0 255.255.0.0.0 area 0

3. In order for a router to be the DR or the BDR for the segment, the router must be elected. This election is based on which factors? Choose all that apply.

4. The OSPF metric is commonly referred to as the cost. The cost is derived from the _____ of a link?

5. An ____ ____ _____ is an OSPF router that connects one or more OSPF areas to the OSPF
backbone.

6. On the segment (on Broadcast and Non-Broadcast network types), each individual non-DR/BDR router establishes an adjacency with the DR and, if one has also been elected, the BDR, and also with any other non-DR/BDR routers on the segment.

7. When enabling OSPF over NBMA technologies such as Frame Relay, remember that the neighbours must be defined statically, as OSPF does not use Multicast transmission for neighbour discovery for the default Non-Broadcast network type.

8. Th e non-DR/BDR routers send messages and updates to the AllDRRouters Multicast group address _______.

9. The DR then advertises messages to the AllSPFRouters Multicast group address ______.

10. By explicitly acknowledging packets with LSAcks, the flooding mechanism used by OSPF is considered reliable.

11. OSPF elects a Designated Router (DR) and/or a Backup Designated Router (BDR) on Broadcast and Non-Broadcast network types. It is important to understand that the BDR is a mandatory component on these network types.