01
Front
What kind of routing protocol is OSPF?
Back
OSPF is a link-state interior gateway protocol.
Free Online Flashcard Deck
3 OSPF Fundamentals and Configuration Free Online FlashCards
Study 3 OSPF Fundamentals and Configuration with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.
12 cards
02
Front
How does an OSPF router derive its routes?
Back
Routers build a link-state database (LSDB) and independently run the Shortest Path First (SPF) algorithm to derive routes.
03
Front
How does OSPF compare path costs?
Back
OSPF uses cost. A path’s total cost is the sum of its outgoing interface costs, and OSPF prefers the lowest-cost path.
04
Front
What defines an OSPF area?
Back
An area is a set of OSPF-connected links and routers that share an area-specific LSDB.
05
Front
Must neighboring routers use the same OSPF process ID?
Back
The OSPF process ID identifies the local process, so it does not need to match between neighboring routers.
06
Front
What is the purpose of OSPF Hello packets?
Back
Routers send Hello packets to discover and maintain neighbors.
07
Front
What does the OSPF 2-Way state confirm?
Back
2-Way means Hellos confirm communication in both directions. On a broadcast network, two routers that are neither DR nor BDR may normally remain in this state.
08
Front
Why does OSPF elect a DR and BDR on broadcast networks?
Back
On broadcast networks, OSPF elects a Designated Router (DR) and Backup Designated Router (BDR) to reduce the number of adjacencies needed.
09
Front
What common mismatch can leave an OSPF neighbor in ExStart or Exchange?
Back
An MTU mismatch is a common cause of neighbors remaining in ExStart or Exchange.
10
Front
What can OSPF do with equal-cost routes?
Back
OSPF supports equal-cost paths, allowing a router to use multiple routes when their costs are equal.
11
Front
What does the OSPF Full state mean?
Back
Full means the adjacency’s link-state databases are synchronized.
12
Front
How do OSPF routers form an adjacency on a point-to-point link?
Back
On a point-to-point link, the routers form an adjacency directly.
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