Single-Area-OSPF Flashcards
Goal
What are OSPF characteristics?
Creates a group of controlled areas with minimized joined traffic. Allows problem detection limited to the area. Requires a backbone area that uses a hierarchy topology while the routing domain is external.
What is a Single Area OSPF?
A group of close, common, connected networks, and routers linked through interfaces, additionally routers are added to the OSPF process.
What is multi-point access?
When multiple routers are connected through an ethernet network domain.
What is point-to-point?
Two routers connected by a single broadcast domain.
What is a router ID (RID)
A numeric identification for router interfaces the highest number is prioritized.
What are OSPF Neighbours?
Routers sharing the same OSPF area, monitorable intervals (Hello and dead intervals), authentication types, and stub area flags.
What is OSPF Operation Adjacency?
The neighboring router’s network and the exchange of information between them.
What is Multi-point access adjacency?
A designated router is chosen by the highest RID, in turn, a back up designated route is ready for fail-over. Adjacencies are formed by routers with the DR and BDR.
What is Point-to-Point adjacency?
When two routers form an adjacency.
What it the Hello Protocol?
A heartbeat signal for adjacent communications.
What is a Link State Advertisement (LSA)?
The various forms of LSA’s that share the link state between neighbors; Router, network, summary, AS external, multicast OSPF.
What is a neighbor database?
A llist of router states also included is received Hello packets and from neighbors.
What is a topological database?
The database gathers information from LSA packets, at which an algorithm determines an efficient path to known networks. Additionally adds the routing table to the designated router.
What are the Three initial steps of the OSPF Operation?
Neighbour and adjacency initialization, LSA flooding, and SPF tree calculation.
what are Neighbour and adjacency initialization?
Linked devices send Hello packets on a set time intervals routers recognize neighbors, DR and BDR are elected, all done through multi-point or point to point networks.
