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Exam AZ-103 topic 4 question 57 discussion

Actual exam question from Microsoft's AZ-103

Question #: 57
Topic #: 4

You have a virtual network named VNet1 as shown in the exhibit. (Click the Exhibit tab.)

No devices are connected to VNet1.
You plan to peer VNet1 to another virtual network named VNet2 in the same region. VNet2 has an address space of 10.2.0.0/16.
You need to create the peering.
What should you do first?

A. Create a subnet on VNet1 and VNet2.
B. Add a gateway subnet to VNet1.
C. Modify the address space of VNet1.
D. Configure a service endpoint on VNet2.

Show Suggested Answer

Suggested Answer: C 🗳️
The virtual networks you peer must have non-overlapping IP address spaces. The exhibit indicates that VNet1 has an address space of 10.2.0.0/16, which is the same as VNet2, and thus overlaps. We need to change the address space for VNet1.
Reference:
https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-manage-peering#requirements-and-constraints

by docent at March 29, 2020, 12:47 p.m.

Comments

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RSAN27

Highly Voted 5 years ago

The answer is correct. VNET can be modified

upvoted 8 times

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Sunnyb

Most Recent 2 years, 7 months ago

Yes! Modify VNET1 address space

upvoted 1 times

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jimycrimson16

4 years, 3 months ago

There's no need of modifying network addressing. Simply by creating non-overlapping subnets in each side of the peering this should work. I'd go with A.

upvoted 1 times

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ch2020

4 years, 3 months ago

Answer is modify the address space. On a lighter note ask MS how they were able a create a VNET with overlapping IP range :)

upvoted 2 times

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Thi

4 years, 7 months ago

C. Modify the address space of VNet1.

upvoted 2 times

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arshadnazir

4 years, 8 months ago

Answer is A Create a subnet on VNet1 and VNet2. Peering can be done with same address space but subnet should be different. You can delete and create address space but still you need you create subnets to do the peering

upvoted 1 times

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Shadow983

4 years, 9 months ago

Address space could not be modified after created If you want to create the peering, you just need to create a subnet in VNet1 and VNet2 with a different IP range. I will go 'A'

upvoted 1 times

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jjkidd72

4 years, 9 months ago

More like delete and recreate...

upvoted 1 times

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AzureArchitect

5 years ago

address space can be modified if there is no subnet created according to doc now after resolving issue mentioned here https://github.com/MicrosoftDocs/azure-docs/issues/20572, resizing is possible

upvoted 4 times

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P0d

5 years, 2 months ago

Vnet address space can be deleted only. First you need to add new address space and then delete overlapped address from VNET2

upvoted 1 times

aimar047

5 years, 2 months ago

makes sense.. but none given in the questions options.. I assume no answer should be given here..

upvoted 1 times

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asdfgh1234567

5 years, 1 month ago

not true, an address space can be modified

upvoted 4 times

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_syamantak

4 years, 10 months ago

Deletion of address space + creation of a new address space = modification of address space.

upvoted 1 times

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bnair

4 years, 10 months ago

Not correct. You can straight up modify the address space as long as it does not have a subnet and there is no peering on it.

upvoted 1 times

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aimar047

5 years, 2 months ago

True not sure if address spaces can be modified after a VNET is created. There should be few requirements to change the address space not specified in the given options. https://github.com/MicrosoftDocs/azure-docs/issues/20572

upvoted 2 times

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docent

5 years, 2 months ago

But you cannot modify address space? Shouldn't we create subnets and then peer?

upvoted 2 times

asdfgh1234567

5 years, 1 month ago

you can modify an address space provided it has no subnets.

upvoted 7 times

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SB11111

5 years, 1 month ago

Address space can be modified. Tested.

upvoted 5 times

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