300-320 · Question #84
Which router type injects external LSAs into the OSPF database using either other routing protocols or static routes?
The correct answer is E. ASBR. An ASBR (Autonomous System Boundary Router) sits at the boundary between OSPF and another routing domain (such as EIGRP, BGP, RIP, or static routes). It redistributes external routes into OSPF, generating Type 5 LSAs (external LSAs) that are flooded throughout the OSPF domain…
Question
Which router type injects external LSAs into the OSPF database using either other routing protocols or static routes?
Options
- Abackbone router
- BABR
- Cinternal router
- Ddesignated router
- EASBR
How the community answered
(30 responses)- A3% (1)
- C3% (1)
- D7% (2)
- E87% (26)
Explanation
An ASBR (Autonomous System Boundary Router) sits at the boundary between OSPF and another routing domain (such as EIGRP, BGP, RIP, or static routes). It redistributes external routes into OSPF, generating Type 5 LSAs (external LSAs) that are flooded throughout the OSPF domain. ABRs connect areas within OSPF, backbone routers reside in Area 0, internal routers stay within a single area, and designated routers manage DR elections on multi-access segments-none of these inject external routes.
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