Juniper JN0-363 Exam - Topic 3 Question 59 Discussion

Actual exam question for Juniper's JN0-363 exam

Question #: 59
Topic #: 3

[All JN0-363 Questions]

Which new field is added to an IPv6 header as compared to IPv4?

Aflow label

Bchecksum

Cfragment offset

Dversion

Show Suggested Answer

Suggested Answer: A

https://www.omnisecu.com/tcpip/ipv6/comparison-between-ipv4-header-and-ipv6-header.php#:~:text=IPv6%20header%20is%20much%20simpler%20than%20IPv4%20header.&text=The%20size%20of%20IPv6%20header,are%20128%20bit%20binary%20numbers.&text=In%20IPv4%20header%2C%20the%20source,are%2032%20bit%20binary%20numbers.

The flow label is a new field added to IPv6 headers that was not present in IPv4 headers. It is used to identify packets that require special handling by routers, particularly for quality-of-service (QoS) purposes. Reference::

IPv6 Header Format, Juniper Networks Documentation

IPv6 Overview, Juniper Networks Documentation

by Leigha at Jul 11, 2025, 01:13 PM

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Lauran

7 months ago

Wait, are you sure? I thought it was the checksum.

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Mari

7 months ago

Agreed, flow label is the new one.

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Domingo

7 months ago

Yup, flow label is key for traffic management.

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Leila

7 months ago

I didn't realize there was a new field at all!

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Ngoc

8 months ago

It's definitely the flow label!

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Lilli

8 months ago

The version field is definitely in both IPv4 and IPv6, so it can't be the answer. I'm leaning towards flow label.

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Raymon

8 months ago

I feel like the fragment offset is related to IPv6, but I can't recall if it's new or just different from IPv4.

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Lovetta

8 months ago

I remember practicing a question about IPv6 headers, and I think the checksum is actually removed, not added.

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Jolene

9 months ago

I think the flow label is the new field in IPv6, but I'm not completely sure.

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Whitley

9 months ago

Ah, I remember learning about this! The flow label field in IPv6 is used for identifying and handling traffic flows. I'm confident that's the right answer here.

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Johanna

9 months ago

The checksum field was removed in IPv6, so I'm guessing the answer is not B. As for the other options, I'll have to review my notes to be sure.

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Elvera

9 months ago

Hmm, I'm a bit unsure on this one. I know IPv6 has some differences from IPv4, but I can't quite remember what new fields were added. I'll have to think this through carefully.

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Goldie

9 months ago

I'm pretty sure the answer is A - flow label. IPv6 added that field to help with traffic flow management.

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Mi

11 months ago

Actually, the correct answer is A) flow label because it helps in identifying and distinguishing different flows of data.

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Frederica

11 months ago

I'm not sure, but I think it might be D) version.

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Twana

11 months ago

A) flow label, no doubt. I mean, how else are you gonna keep track of those high-speed internet packets, am I right?

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Latrice

10 months ago

D) version field indicates the version of the IP protocol being used.

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Alaine

10 months ago

C) fragment offset helps in reassembling fragmented packets at the receiving end.

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Karan

10 months ago

B) checksum is also important for error detection in the packet transmission.

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Rueben

10 months ago

A) flow label, no doubt. I mean, how else are you gonna keep track of those high-speed internet packets, am I right?

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Dean

11 months ago

Haha, I bet the answer is C) fragment offset. That's like, the most useless field in the IPv4 header, so they probably kept it in IPv6 just for laughs.

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