Juniper JN0-363 Exam - Topic 2 Question 17 Discussion

Actual exam question for Juniper's JN0-363 exam

Question #: 17
Topic #: 2

You are bringing a new network online with three MX Series devices enabled for STP. No root bridge priority has been configured. Which statement is true in this scenario?

AThe device with the lowest MAC address will be elected as the root bridge.

BThe device with the highest MAC address will be elected as the root bridge.

CThe device with the lowest numerical lo0 IP address will be elected as the root bridge.

DThe device with the highest numerical lo0 IP address will be elected as The bridge.

Show Suggested Answer

Suggested Answer: C, D

by Brandon at Jul 29, 2023, 10:09 PM

Limited Time Offer

25%

Off

Get Premium JN0-363 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Juliann

3 months ago

I thought it was the highest MAC, but I guess not!

upvoted 0 times

...

Samuel

3 months ago

Nope, lowest MAC for sure!

upvoted 0 times

...

Shenika

4 months ago

Wait, are we sure about that? I thought it was based on IPs.

upvoted 0 times

...

Nieves

4 months ago

Totally agree, that's how STP works.

upvoted 0 times

...

Ora

4 months ago

It's definitely the lowest MAC address that wins!

upvoted 0 times

...

Isidra

4 months ago

I thought the highest MAC address would be chosen if no priority was configured, but now I'm second-guessing myself.

upvoted 0 times

...

Alva

4 months ago

I’m a bit confused about the IP address options. Does the lo0 IP address even come into play if no priority is set?

upvoted 0 times

...

Jaime

5 months ago

I remember practicing a similar question, and I believe it was about MAC addresses determining the root bridge.

upvoted 0 times

...

Jules

5 months ago

I think the lowest MAC address wins the root bridge election, but I'm not completely sure.

upvoted 0 times

...

Tonette

5 months ago

Okay, let me see here. I think I remember something about Level 1 and Level 2 routers not advertising Level 2 routes into the Level 1 area by default. But I'm not sure about the other statements.

upvoted 0 times

...

Loreta

5 months ago

I'm pretty confident the answer is D. The HTML body is processed after the subject line, so that's where the outdated variable would be.

upvoted 0 times

...

Cordelia

5 months ago

Okay, let's see here. The health checks are failing on port 80, so I'm guessing we need to open up that port somehow. Maybe one of the firewall rule options will do the trick.

upvoted 0 times

...

Leonardo

10 months ago

I heard the root bridge is chosen by the network administrator throwing darts at a dartboard with the device MAC addresses written on it. Closest one to the bullseye wins.

upvoted 0 times

...

Delsie

10 months ago

I bet the root bridge election is decided by a game of rock-paper-scissors between the MX Series devices. Highest score wins!

upvoted 0 times

Luis

8 months ago

B) The device with the highest MAC address will be elected as the root bridge.

upvoted 0 times

...

Tran

9 months ago

No way, it's actually the device with the lowest numerical lo0 IP address that becomes the root bridge.

upvoted 0 times

...

Tequila

9 months ago

A) The device with the lowest MAC address will be elected as the root bridge.

upvoted 0 times

...

Mariann

10 months ago

What? The device with the highest numerical lo0 IP address? That's just silly. Who designed these questions, a bunch of network gnomes?

upvoted 0 times

Armanda

9 months ago

Well, hopefully we won't encounter any network gnomes in real life!

upvoted 0 times

...

Herman

9 months ago

I think it's just to test our knowledge on STP configurations.

upvoted 0 times

...

Timothy

9 months ago

I agree, that does sound silly. Who comes up with these questions?

upvoted 0 times

...

Lamonica

10 months ago

Hmm, I'm leaning towards option C. The device with the lowest numerical lo0 IP address seems like the logical choice, right? Wait, do I even have a lo0 interface?

upvoted 0 times

Felix

9 months ago

User 3: In that case, the device with the lowest MAC address will be elected as the root bridge.

upvoted 0 times

...

Lynelle

9 months ago

User 2: But what if none of the devices have a lo0 interface? What happens then?

upvoted 0 times

...

Aliza

9 months ago

User 1: I think option C is correct. The device with the lowest numerical lo0 IP address will be elected as the root bridge.

upvoted 0 times

...

Ozell

10 months ago

I'm not sure about that. Shouldn't the device with the highest MAC address be elected as the root bridge in this scenario? This is confusing.

upvoted 0 times

Junita

8 months ago

No problem! It can be confusing, but now you know.

upvoted 0 times

...

Lera

8 months ago

Oh, I see. Thanks for clarifying that.

upvoted 0 times

...

Pete

8 months ago

Actually, it's the device with the highest MAC address that will be elected as the root bridge.

upvoted 0 times

...

Goldie

8 months ago

I think the device with the lowest MAC address will be elected as the root bridge.

upvoted 0 times

...

Colette

9 months ago

No problem! It can be confusing, but now you know.

upvoted 0 times

...

Nieves

9 months ago

Oh, I see. Thanks for clarifying that.

upvoted 0 times

...

Alona

9 months ago

Actually, it's the device with the highest MAC address that will be elected as the root bridge.

upvoted 0 times

...

Cecil

10 months ago

I think the device with the lowest MAC address will be elected as the root bridge.

upvoted 0 times

...

Dottie

10 months ago

I'm not sure, but I think the rationale behind A) is that STP uses the Bridge ID, which is a combination of the bridge priority and MAC address to elect the root bridge.

upvoted 0 times

...

Richelle

10 months ago

I disagree, I believe the answer is B) The device with the highest MAC address will be elected as the root bridge.

upvoted 0 times

...

Oretha

11 months ago

I think option A is the correct answer. Without a configured root bridge priority, the device with the lowest MAC address will be elected as the root bridge.

upvoted 0 times