OSPF

Question 1

Router LSA

LSA 1

Answer 1

Answer -

Produced by every router. Includes all the router’s links, and cost. This LSA type is flooded within a single area.

Question 2

Network LSA

LSA 2

Answer 2

Answer -
Produced by every DR on every broadcast or NBMA network. It lists all the routers in the multi-access network. This LSA type is contained within a area.

Question 3

Summary LSA for ABRs

LSA 3

Answer 3

Answer -

Produced by ABRs. It is sent to an area to advertise destinations outside the area.

Question 4

Summary LSA for ASBRs

LSA 4

Answer 4

Answer -

Originated by ABRs. Sent into an area by the ABR to advertises ASBRs.

Question 5

Autonomous system external LSA

LSA 5

Answer 5

Answer -
Originated by ASBRs. Advertises destination external to the OSPF autonomous system, flooded throughout the whole OSPF autonomous system.

Question 6

Not-so-Stubby area (NSSA) external LSA

LSA 7

Answer 6

Answer -
Originated by ASBRs in a NSSA. It is NOT flooded throughout the OSPF autonomous system, only to the NSSA. Similar to the Type 5 LSA.