Nokia 4A0-104 Exam - Topic 1 Question 97 Discussion

Actual exam question for Nokia's 4A0-104 exam

Question #: 97
Topic #: 1

A customer requests that their Layer 2 Ethernet service be configured to forward frames up to 1500 bytes. The service provider is using MPLS encapsulation (without RSVP-TE fast-reroute) on their IP/MPLS network. What is the minimum MTU setting for the network ports?

A1512

B1522

C1536

D1542

Show Suggested Answer

Suggested Answer: B

by Stephanie at Apr 05, 2025, 04:58 PM

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Eve

7 months ago

I thought it would be higher, like 1536.

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Chana

7 months ago

Totally agree, 1512 is the right choice here!

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Melvin

8 months ago

Wait, why not 1522? Seems off to me.

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Lon

8 months ago

1512 makes sense, but I’m surprised it’s not more!

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Lavelle

8 months ago

The minimum MTU should be 1512 bytes.

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Peggie

8 months ago

I thought the minimum MTU for MPLS was 1536 bytes, but I could be confusing it with another protocol. Need to double-check that!

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Oretha

8 months ago

If the customer wants to forward frames up to 1500 bytes, I feel like we need to add the overhead from MPLS. Is it 1522 bytes?

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Ludivina

9 months ago

I think we practiced a similar question where we had to calculate MTU for MPLS. I want to say it was around 1512 bytes, but I could be mixing it up.

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Rebbeca

9 months ago

I remember that the MTU needs to account for the Ethernet frame size plus the MPLS headers, but I'm not entirely sure about the exact number.

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Ronnie

9 months ago

Good point about the MPLS overhead. I think the key is understanding how that affects the maximum frame size the network needs to support.

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Hyman

9 months ago

I'm pretty confident the answer is B. The MPLS header adds 4 bytes, and the Ethernet frame can be up to 1500 bytes, so the minimum MTU should be 1522.

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Marget

9 months ago

Hmm, I'm a bit confused. Does the MPLS encapsulation add any overhead that we need to account for?

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Casey

10 months ago

Okay, let's think this through step-by-step. We need to consider the MPLS encapsulation and the customer's requirement for 1500-byte frames.

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Eva

1 year ago

Wow, this question is really making my head spin. Maybe I should have studied more about MPLS encapsulation before taking this exam. Or maybe I should have just asked the network admin to fill out the answer for me. *sigh*

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Helaine

1 year ago

Let's double-check the MTU setting with the network admin just to be safe.

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Filiberto

1 year ago

I believe it's D) 1542, but I could be wrong.

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Jovita

1 year ago

I'm not sure, but I think it's either A) 1512 or C) 1536.

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Margot

1 year ago

Don't worry, I think the answer is C) 1536.

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Ellen

1 year ago

I'm going to have to disagree with you all. The answer is A) 1512. Why? Because the customer specifically requested 1500-byte frames, and the MPLS header is already accounted for. Anything more would be overkill!

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Catherin

1 year ago

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Elroy

1 year ago

D) 1542

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Martina

1 year ago

C) 1536

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Celestina

1 year ago

B) 1522

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Loren

1 year ago

A) 1512

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Arminda

1 year ago

This question is a piece of cake! The answer is clearly B) 1522. I mean, who doesn't know that the MPLS header adds 4 bytes to the frame size?

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Callie

1 year ago

D) 1542 is the correct answer. The MPLS header adds 4 bytes, and the service provider should account for an additional 38 bytes for the Ethernet header and trailer.

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Elvera

1 year ago

D) 1542 is the correct answer.

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Tayna

1 year ago

D) 1542

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Art

1 year ago

C) 1536

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Mable

1 year ago

B) 1522

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Curt

1 year ago

A) 1512

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Wilbert

1 year ago

Hmm, I'm gonna go with C) 1536. That should be enough to handle the MPLS encapsulation and the 1500-byte frames, right? Better safe than sorry!

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Joseph

1 year ago

User 4: Definitely, it's always good to be prepared for any potential issues.

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Zoila

1 year ago

User 3: I agree, better to have a little extra room just in case.

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Cecil

1 year ago

User 2: Agreed, it's better to have a buffer in case of any unexpected overhead.

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Delpha

1 year ago

User 2: Yeah, that sounds like a safe bet.

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Joseph

1 year ago

User 1: I think C) 1536 is the right choice.

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Alaine

1 year ago

User 1: I think C) 1536 is the right choice too. It's always good to have a little extra room.

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Shalon

1 year ago

I agree with Earleen, 1522 makes more sense for the network ports with MPLS.

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Gearldine

1 year ago

I think the answer is B) 1522. The MPLS header adds 4 bytes to the Ethernet frame, and the customer wants to support frames up to 1500 bytes, so the minimum MTU needs to be 1522 bytes.

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Earleen

1 year ago

I disagree, I believe it should be 1522 because of the MPLS encapsulation.

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Marg

1 year ago

I think the minimum MTU setting should be 1536.

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