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Exam MD-100 topic 4 question 42 discussion

Actual exam question from Microsoft's MD-100

Question #: 42
Topic #: 4

HOTSPOT -
You have the network shown in the following exhibit.

Computer1, Computer2, and Computer3 run Windows 10. Windows Defender Firewall is configured to allow ICMP traffic.
RTR1 is a router.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
Hot Area:

Show Suggested Answer

Suggested Answer:

Box 1: Yes -
Through RTR1 which has been configured as the default gateway for Comptuer1.

Box 2: Yes -
Through RTR1 which has been configured as the default gateway for Comptuer1.

Box 3: No -
Computer3 has not been configured with a default gateway.

by Barrybobslee_111 at Sept. 1, 2022, 5:49 p.m.

Comments

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Barrybobslee_111

Highly Voted 2 years, 10 months ago

Yes, No, Yes for me. No for tbe 2nd because computer 3 has no gateway.

upvoted 16 times

Rickert

2 years, 9 months ago

So why is the third question Yes?

upvoted 1 times

kyor

2 years, 9 months ago

Because it's the same network. you don't need a gateway. yes, no, yes for me too.

upvoted 8 times

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Hatsapatsa

2 years, 6 months ago

They only need default gateway configured when the sender and receiver are separated by a router.

upvoted 1 times

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ExamTopics1_EIS

Most Recent 2 years, 3 months ago

YES, YES, YES. I see people concerned about 3 not having gateway? Doesn't need it unless it's trying to reach another computer and it has to be on another subnet. Y,Y,Y is the correct answer (given that the router allows the ICMP packets).

upvoted 1 times

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Powaball

2 years, 3 months ago

Answer is Yes, No, Yes. 1. Yes, because the router between the two indiffirent networks will build the routes, if your gateway points to your subnet gateway then you will get a reply 2. No - because computer3 does not have a gateway it cannot allow the router to route the traffic 3. Yes - because computer2 and 3 are on the same subnet - no gateway/router is required to translate routes.

upvoted 1 times

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Hatsapatsa

2 years, 6 months ago

Y: From computer1 to computer2 via router1 and reply goes back through router1. N: From computer1 gets to computer3 via router1 but can't send reply since default gateway is not configured and sender is behind the router. Y: From computer2 to computer3 works since they are not separated by a router, therefore default gateway must not be configured for this ping. All my answers were tested in a lab environment, above statements are objective.

upvoted 3 times

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Aji03

2 years, 7 months ago

whats the right answer here?

upvoted 1 times

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Lenthelegend

2 years, 7 months ago

Networking is not my strongest. Now I am very confused, because there is no consensus in the discussion. Does anyone know the right answer for certain?

upvoted 1 times

3dk1

2 years, 2 months ago

Trust me, you need a gateway to speak to other subnets. Yes, No, Yes for me. Even if I see the question on the test this is what I am doing.

upvoted 1 times

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Saad91

2 years, 8 months ago

Yes, No, No computer 3 has no gateway so 2 en 3 are No

upvoted 3 times

smatas

2 years, 7 months ago

A gateway is only needed to get passed the Router/ out of the broadcastdomain, so anything in one broadcastdomain (10.10.1.x) can ping eachother. Therefore Q3 is Yes. Also Q2 is NO because comp1 and comp3 are NOT in the same broadcastdomain, thus need a Gateway to communicate, which comp3 doesn't have. See a gateway like the front door of your house, anything internal you can go (bathroom, livingroom bedroom etc) but without a front door (gateway) you cant go to the mall, park etc.

upvoted 2 times

smatas

2 years, 7 months ago

Also i believe for Q2, if it would have asked is comp3 able to receive the ping of comp1 then YES. The ping of comp 1 will reach comp3, but comp3 is unable to send an acknowledgement back that it has received the ping. A ping is like a shout "who has?" and comp3 hears it but cant shout back "I have!". I think a /traceroute would confirm this. This is all basic stuff covered in the CCNA course.

upvoted 1 times

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Princee450

2 years, 8 months ago

I agree. Barrybobslee is contradicting himself.

upvoted 1 times

DaZa5

1 year, 12 months ago

He has right. It the base of the networking.

upvoted 1 times

DaZa5

1 year, 12 months ago

he is right*

upvoted 1 times

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