Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF LSA Types – Type 3 Summary LSAs):
“Type 3 LSAs (Summary LSAs) are generated by Area Border Routers (ABRs) to advertise intra-area routes into other areas. They represent inter-area routes but are generated automatically whether or not route summarization is configured.”
ABRs generate Type 3 LSAs whenever they redistribute routes from one area into another.
Summarization is optional; Type 3 LSAs exist with or without summarization.
Thus, correct answer is D.
—
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit