Nokia 4A0-113 Exam With Confidence Using Practice Dumps

Comprehensive and Detailed Explanation From Exact Extract:

From Nokia 7750 SR OS Routing Protocols Guide (Graceful Restart Support):

Graceful Restart is supported by OSPF and IS-IS for IGPs.

BGP also supports Graceful Restart (but BGP is not an IGP).

RIPv1 and RIPv2 do not support Graceful Restart.

Thus, correct answers: B, C.

—

Comprehensive and Detailed Explanation From Exact Extract:

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

A (Router LSA - Type 1): Always area-scoped.

B (Network LSA - Type 2): Always area-scoped.

C & D (Summary LSAs - Type 3): Flooded between areas.

E (AS-External LSAs - Type 5): Have AS-wide scope.

Thus, correct answers: A, B.

—

Let’s break it down step-by-step:

Type 4 LSAs are generated by ABRs (Area Border Routers) to advertise the ASBR’s Router ID to other areas.

The ASBR itself (R1) does not generate Type 4 LSAs.

R1 belongs to Area 1.

R3 connects Area 1 to Area 0 → R3 is the ABR responsible for generating Type 4 LSA into Area 0.

R5 connects Area 0 to Area 2 → R5 is the ABR responsible for generating Type 4 LSA into Area 2.

Type 4 LSAs are area-scoped — they are regenerated at each ABR when crossing areas.

—

Now let’s analyze the options:

A — Incorrect: R1 (the ASBR) does not generate Type 4 LSAs.

B — Incorrect: R3 does not flood into all areas.

C — Incorrect: R3 does not flood into Area 2.

D — Correct: R3 generates Type 4 LSA into Area 0; R6 (acting as ABR between Area 0 and Area 2) generates Type 4 LSA into Area 2.

—

Thus, the correct answer is: D