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OSPF

CCNA-OSPF

QuestionAnswer
Router ID The router ID (RID) is an IP address used to identify the router. The highest IP address of all configured loopback interfaces.
Neighbor Are two or more routers that have an interface on a common network, such as two routers connected to a point-to-point.
Adjacency Is a relationship between two OSPF routers that permits thedirect exchange of route updates. OSPF will only share routing updates with neighbors that have established adjacencies.
Hello Protocol This protocol provides dynamic neighbor discovery and maintains neighbor relationships. Hello packets and LSA build and maintain the topology database.
Neighborship Database Is a list of all OSPF routers, for which Hello packets have been seen.
Topological Database Contains information from all the Link State Advertisement (LSA) packets that have been received for an area. The router uses this info as input into the algorithm that computes the shorted path to all networks.
Link State Advertisement IS an OSPF data packet containing link-state and routing information that shared amount OSPF routers. OSPF will exchange LSA packets with established adjacent routers.
Designated Router Is elected whenever OSPF routers are connected to the same broadcast network.
Backup Designated Router Is a hot standby for the DR on broadcast networks. Receives all routing updates from OSPF adjacent routers, but doesn't flood LSA updates.
OSPF Areas Is a grouping of contiguous networks and routers. All routers in the same area share a common Area ID
Point-to-Point Refers to a type of topology consisting of a direct connection between two routers that provide a single communication path.
Point-to-Multipoint Refers to a type of network topology consisting of a series of connections between a single interface on one router and multiple destination routers.
Created by: kmusk01
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