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Nokia Exam 4A0-112 Topic 4 Question 9 Discussion

Actual exam question for Nokia's 4A0-112 exam

Question #: 9
Topic #: 4

[All 4A0-112 Questions]

Refer to the exhibit.

Routers R1 through R4 in the diagram have established IS-IS adjacencies. Router R1 is L1/L2 and is the DIS of its two broadcast interfaces. How many LSPs will it generate?

A2

B3

C4

D5

Show Suggested Answer

Suggested Answer: B

During the IP forwarding process, routers use the routing table to determine the next hop based on the destination IP address. The source IP address is not directly involved in the lookup process for forwarding.

The ARP table is used to map IP addresses to MAC addresses, specifically for resolving the MAC address of the next hop (destination MAC address) for forwarding packets within the local network.

by Weldon at Mar 18, 2025, 02:33 PM

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Refugia

2 months ago

Alright, let's think this through step-by-step. R1 has 2 broadcast interfaces, so that's 2 LSPs. Plus the database summary, so 3 LSPs. And since it's the DIS, one more for that. 4 LSPs, got it!

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Roxanne

20 days ago

User 3: Correct, it will generate 4 LSPs.

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Vallie

1 months ago

User 2: 4

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Talia

1 months ago

User 1: So, how many LSPs will R1 generate?

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Vannessa

2 months ago

Haha, I bet the test writer is an IS-IS fanatic. Who else would come up with a question like this?

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Tequila

27 days ago

Let's go with option B then, 3 LSPs.

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Willard

1 months ago

I agree, R1 will generate 3 LSPs.

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Myong

1 months ago

I think the answer is 3, what do you think?

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Mona

2 months ago

I know right, this question is definitely for the IS-IS experts.

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Sharita

2 months ago

This is a trick question! The answer is 5, because R1 is also the DIS, so it will generate an additional LSP for the DIS.

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Margarett

2 months ago

No, it's actually D) 5 because R1 will generate an additional LSP for being the DIS.

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Margarett

2 months ago

A) 2

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Corinne

2 months ago

That makes sense, I see your point now. Thanks for explaining.

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Luisa

2 months ago

If R1 is L1/L2, it should generate 4 LSPs - one for each of its interfaces plus one for the database summary.

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Dong

25 days ago

D) 5

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Aracelis

1 months ago

C) 4

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Jesusita

1 months ago

B) 3

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Jacquelyne

1 months ago

A) 2

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Gayla

2 months ago

D) 5

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Glynda

2 months ago

C) 4

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Paola

2 months ago

B) 3

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Octavio

2 months ago

A) 2

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Johnson

2 months ago

I disagree, I believe the answer is C) 4 because R1 is the DIS of its two broadcast interfaces.

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Corinne

3 months ago

I think the answer is A) 2.

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