| A | B |
|---|
| Backbone | Structural core of the network which connects all componets of the network. |
| BD | Backup to the designated router |
| DR | OSPF router that generates LSAs for a multiaccess network |
| Flooding | Process that sends information out all ports with the exception of the port it was received on. |
| Hello Protocol | Protocol used by OSPF systems to establish and maintain neighbors. |
| LSA | Broadcast packet used by link-state protocols that contain information about neighbors and path costs. |
| Process Identifier | Numerical number assigned during OSPF configuration process that identifies each OSPF process running on a router. |
| Router ID | Highest IP address on an active physical or loopback interface. |
| SPF Algorithm | Mathematical equation used to find the best path. |
| Cost | Metric based on bandwidth |
| Hello Packet | Sent periodically out if each interface using IP multicast addresses. |
| Ex-start State | Condition after the DR and BDR have been elected. |
| Full | State routers must be in before they can route traffic. |
| SPF Delay | Command to prevent routers from computing a new routing table until 5 seconds after a route change. |
| Distance Vector | Routing protocols that determine distance and direction in the internetwork |
| Link-State | Routing protocols that are called the shortest path first. |
