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Exam AZ-101 topic 3 question 12 discussion

Actual exam question from Microsoft's AZ-101

Question #: 12
Topic #: 3

[All AZ-101 Questions]

You have an Azure subscription that contains a virtual network named VNet1. VNet 1 has two subnets named Subnet1 and Subnet2. VNet1 is in the West Europe
Azure region.
The subscription contains the virtual machines in the following table.

You need to deploy an application gateway named AppGW1 to VNet1.
What should you do first?

A. Add a service endpoint.
B. Add a virtual network.
C. Move VM3 to Subnet1.
D. Stop VM1 and VM2.

Show Suggested Answer

Suggested Answer: D 🗳️
If you have an existing virtual network, either select an existing empty subnet or create a new subnet in your existing virtual network solely for use by the application gateway.
Verify that you have a working virtual network with a valid subnet. Make sure that no virtual machines or cloud deployments are using the subnet. The application gateway must be by itself in a virtual network subnet.
References:
https://social.msdn.microsoft.com/Forums/azure/en-US/b09367f9-5d01-4cda-9127-b7a506a0a151/cant-create-application-gateway? forum=WAVirtualMachinesVirtualNetwork https://docs.microsoft.com/en-us/azure/application-gateway/application-gateway-create-gateway

by salimfayad at Feb. 8, 2020, 10:15 a.m.

Comments

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lianghua19

9 months, 2 weeks ago

I don't get it, why need to move VM3 to subnet1?

upvoted 1 times

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Gizdagyerek

3 years, 3 months ago

It's clear that C is a lot better answer than D.

upvoted 2 times

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Lubomir

3 years, 9 months ago

I think option C "Move VM3 to Subnet1" is only valid. Tested this movement (inside assigned NIC in section IPConfiguration, there is an option to change subnet, which restarted VM). After restart VM had new private IP from different subnet. I also tried to stop VM in subnet, where only this VM was assigned. Then I tried to create new AppGtw to this subnet and portal did not give me the option, selected subnet was not possible to use. Even if VM was stopped, it still had its privateID (public was released) what was probably the reason, why this subnet is not usable for AppGtw.

upvoted 3 times

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salimfayad

3 years, 10 months ago

Why solution "C" is not valid?