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Exam AZ-103 topic 4 question 57 discussion

Actual exam question from Microsoft's AZ-103
Question #: 57
Topic #: 4
[All AZ-103 Questions]

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 Hide 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.

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RSAN27
Highly Voted 4 years, 10 months ago
The answer is correct. VNET can be modified
upvoted 8 times
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Sunnyb
Most Recent 2 years, 5 months ago
Yes! Modify VNET1 address space
upvoted 1 times
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jimycrimson16
4 years, 1 month 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, 2 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, 6 months ago
C. Modify the address space of VNet1.
upvoted 2 times
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arshadnazir
4 years, 6 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, 8 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, 8 months ago
More like delete and recreate...
upvoted 1 times
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AzureArchitect
4 years, 11 months 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 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 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
4 years, 12 months ago
not true, an address space can be modified
upvoted 4 times
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_syamantak
4 years, 8 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, 8 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 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, 1 month ago
But you cannot modify address space? Shouldn't we create subnets and then peer?
upvoted 2 times
asdfgh1234567
4 years, 12 months ago
you can modify an address space provided it has no subnets.
upvoted 7 times
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SB11111
4 years, 11 months ago
Address space can be modified. Tested.
upvoted 5 times
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