4A0-113 Exam Dumps - Nokia OSPF Routing Protocol Exam

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.

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Comprehensive and Detailed Explanation From Exact Extract:

From Nokia 7750 SR OS Routing Protocols Guide (OSPF LSA Types):

“Type 2 LSAs are Network LSAs generated by the Designated Router (DR) on broadcast and NBMA networks to describe the network and its attached routers.”

Thus, correct answer is C.

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Comprehensive and Detailed Explanation From Exact Extract:

From Nokia 7750 SR OS Routing Protocols Guide (RIP Route Export Configuration):

“RIP on the Nokia 7750 SR does not automatically advertise locally attached routes. A route policy must be used to export locally learned routes into RIP.”

Route policies control what routes are exported from the local routing table into RIP advertisements.

No access-list or neighbor configuration is required for this.

Thus, correct answer is A.

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Comprehensive and Detailed Explanation From Exact Extract:

According toNokia 7750 SR OS OSPF Guide — OSPF Packet Transmission Section:

“OSPF is encapsulated directly over IP using protocol number 89. It does not use TCP or UDP.”

TCP (Protocol 6) → Incorrect.

UDP (Protocol 17) → Incorrect.

OSPF operates directly at IP layer using protocol number 89.

Thus, the correct answer isD.

Comprehensive and Detailed Explanation From Exact Extract:

FromNokia 7750 SR OS OSPF Guide — OSPF Timers Section:

“The default OSPF Hello interval is 10 seconds, and the default Dead interval is four times the Hello interval (40 seconds).”

Thus:

Hello interval = 10 seconds

Dead interval = 40 seconds

This configuration ensures stability in adjacency monitoring.