In the process of OSPF, if its Link Type is 1, the LSA describes the point-to-point link from this router to the neighbor router. At this time, the corresponding Link ID describes the content of the…

Question

Options

• ATRUE
• BFALSE

• A
  21% (5)
• B
  79% (19)

Explanation

Option B (FALSE) is correct because in OSPF Router LSAs (Type 1 LSA), when the Link Type is 1 (point-to-point), the Link ID contains the Neighbor Router ID - not the neighbor router's interface IP address. The interface IP address is instead stored in the Link Data field of that same LSA entry, which is a common source of confusion.

Option A is wrong because it conflates two different fields: the Link ID and the Link Data. While the neighbor's interface IP address is relevant to a point-to-point link, it lives in Link Data, not Link ID.

Memory tip: Think of Link ID as the identity of what you're connecting to - for a point-to-point link, that identity is the Router ID (a logical identifier), not an IP address. The mnemonic "ID = identity = Router ID" helps keep this straight. Reserve "interface IP" for the Link Data field, which holds the detail about the local interface used to reach that neighbor.

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