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Exam AZ-104 topic 5 question 71 discussion

Actual exam question from Microsoft's AZ-104

Question #: 71
Topic #: 5

HOTSPOT -
You have an Azure subscription that contains the virtual networks shown in the following table.

The subscription contains the private DNS zones shown in the following table.

You add virtual network links to the private DNS zones as shown in the following table.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
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by dookiecloud at May 31, 2021, 12:35 p.m.

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az_21

Highly Voted 4 years ago

https://docs.microsoft.com/en-us/azure/dns/private-dns-virtual-network-links A virtual network can be linked to private DNS zone as a registration or as a resolution virtual network. Registration virtual network: A private DNS zone can have multiple registration virtual networks. However, every virtual network can only have one registration zone associated with it. Resolution virtual network: One private DNS zone can have multiple resolution virtual networks and a virtual network can have multiple resolution zones associated to it. 1. Yes No registration zone for VNET2. 2. Yes A virtual network can have multiple resolution zones associated to it. 3.Yes No registration zone for VNET2.

upvoted 159 times

TodRose

7 months, 1 week ago

You are wrong, herebis why: 1. Yes - because, Global Scope: Azure Private DNS Zones are global resources, meaning they are not tied to a specific region. You can link any VNet in your Azure subscription to a private DNS zone, regardless of the region. 2. No - auto-registration cannot be enabled or modified on an existing link between a VNet and a private DNS zone. Once a virtual network link is created, the auto-registration setting is locked and cannot be changed. 3. Yes

upvoted 3 times

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nkhan19

2 years, 12 months ago

Number of private DNS zones a virtual network can get linked to with auto-registration enabled = 1

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hercu

3 years, 11 months ago

Correct and well written.

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giggsie

3 years, 7 months ago

Tested this in Lab and it works.

upvoted 6 times

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mashk19

Highly Voted 4 years, 1 month ago

1. Yes 2. Yes. You can link VNET1 to Zone3.com A private DNS zone can have multiple registration virtual networks. However, every virtual network can only have one registration zone associated with it. 3. No. Auto registration is already enabled on Zone 1. When you add a link from VNET2 to Zone

upvoted 71 times

J4U

3 years, 10 months ago

3. Yes. Going by (2), a zone can have multiple registrations while a VNET can have only one. So VNET2 can register to Zone 1.

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dc2k79

2 years, 8 months ago

Auto Registration is a Zone-to-VNet mapping. If one VNet is auto-registered with a Private Zone, that does not mean another VNet cannot be Auto-Registered with it. A private DNS zone can have multiple registration virtual networks. However, every virtual network can only have one registration zone associated with it. https://learn.microsoft.com/en-us/azure/dns/private-dns-virtual-network-links

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ppp131176

4 years ago

For 2. are you sure? shouldn't this be no? Wouldn't zone3 be the second registration zone?

upvoted 8 times

JayBee65

4 years ago

No, because zone 3 does not have autoregistration enabled, so this would be a resolution zone not a registration zone

upvoted 4 times

zvasanth2

3 years, 10 months ago

The 3rd question must be yes. after adding the 3rd question to the existing list looks below: Link1 - Zone1 - VNET1 - Yes Link2 - Zone2 - VNET2 - No Link3 - Zone3 - VNET3 - No Link4 - Zone1 - VNET2 - Yes This is the definition for "Registration virtual network" point 1- A private DNS zone can have multiple registration virtual networks. point 2- However, every virtual network can only have one registration zone associated with it. Link1 and Link4 satisfies the point1 and point2 point1 - Zone is having multiple registration virtual networks like VNET1, VNET2 point2 - VNET2 is not associated with any other zone registered. Link2 has VNET2 but that is a resolution not a registration So answer must be Y Y Y

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ostych

3 years, 3 months ago

Correct, tested in the LAB. Y Y N - Error in azure: Failed to create virtual network link 'link5'. Error: A virtual network can only be linked to 1 Private DNS zone(s) with auto-registration enabled; conflicting Private DNS zone is ...

upvoted 15 times

ostych

3 years, 3 months ago

Update: Y Y Y There was leftover of wrong config in third one.

upvoted 10 times

lancegong

3 years ago

Yes. I am agree with you. Tested and the correct answer should be YYY. It is true that if vnet2 has auto-registration enabled in zone2, you won't be able to enable auto-registration for vnet2 to add another zone. But the Box 1 simply asks you if you can enable auto-registration or not which doesn't mean vnet2 has auto-registration enabled when you answer the Box 3.

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Batiste2023

1 year, 8 months ago

You're overthinking this, I guess... I'd go with YYN.

upvoted 1 times

Batiste2023

1 year, 8 months ago

Ok, I realised I wasn't thinking enough here, the correct answer is YYY: 2) Y: "One private DNS zone can have multiple resolution virtual networks and a virtual network can have multiple resolution zones associated to it." (see https://learn.microsoft.com/en-us/azure/dns/private-dns-virtual-network-links#resolution-virtual-network) 3) "A private DNS zone can have multiple registration virtual networks. However, every virtual network can only have one registration zone associated with it." (https://learn.microsoft.com/en-us/azure/dns/private-dns-virtual-network-links#registration-virtual-network)

upvoted 1 times

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8ac3742

Most Recent 3 months, 2 weeks ago

1. Yes 2. Yes 3. Yes The vNet linked to Private DNS zone with no auto registration is Resolution vNet, The vNet linked to Private DNS zone with auto registration is Registration vNet, The Private DNS zone linked to one vNet with auto registration is Registration DNS zone of that vNet, The Private DNS zone linked to one vNet with no auto registration is Resolution DNS zone of that vNet, vNet cannot have multiple registration zone because it's not allowed to allocate multiple DNS name for one VM in that vNet, vNet cannot have multiple resolution zone because the VM in that vNet can query DNS names via multiple resolution DNS zone.

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ankeshpatel2112

5 months, 2 weeks ago

I have tried this on 24th Jan 2025 Simple Explanation : 1. You can Link Multiple Vnets to Same Private DNS Zone. 2. One Vnet can be linked to multiple Private DNS zones.

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Dankho

9 months ago

Yes - because no auto registration exists for Link2 No - VNet and Zone are not in the same region No - Link1 already has an auto registration and you cannot have more than one.

upvoted 1 times

NizarKarim

6 months, 2 weeks ago

Based on the details provided in the image, here are the answers for the Answer Area: You can enable auto-registration for Link2: In the table, Link2 is associated with Zone2.com and VNET2, and "Enable auto registration" is set to No. Since auto-registration is not enabled for Link2, you cannot enable it unless explicitly configured. Answer: No You can add a virtual network link for VNET1 to Zone3.com: VNET1 (West US) and Zone3.com (East US) are in different regions. Azure allows linking virtual networks to DNS zones across regions. Therefore, it is possible to add this link. Answer: Yes You can add a virtual network link for VNET2 to Zone1.com and enable auto-registration: VNET2 (West US) and Zone1.com (West US) are in the same region, so linking is possible. However, the current configuration for VNET2 (in Link2) does not have auto-registration enabled, so you would need to explicitly configure it. Answer: Yes

upvoted 1 times

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090200f

1 year, 1 month ago

just now tested in Lab, Y-Y-and No.. last box is No: because, getting an Error: A virtual network can only be linked to 1 Private DNS zone(s) with auto-registration enabled; in this case here already Vnet1 is enable in link1 under zone1.com

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Z_MU

1 year, 2 months ago

Y, Y, N Read the fourth bullet point in below article. https://learn.microsoft.com/en-us/azure/dns/private-dns-autoregistration#restrictions

upvoted 3 times

Nathan12345

4 months, 3 weeks ago

you are right i read it.

upvoted 1 times

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tashakori

1 year, 3 months ago

Yes Yes Yes

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Yogesh25

1 year, 5 months ago

I have to waste my 30 min to setup the resorces to try this one out....and here is what i got, 1. Yes - We can enable auto register provided there is no conflict 2. Yes - There is no impact of location on setting up Vnet link but in case v-net is already registered with another private zone then auto registration can't be enabled. 3. No, above reason.

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ziggy1117

1 year, 8 months ago

Y - Y - Y. I tested this myself in a real environment. best to test it vs. making comments here without any test. 1. Y. You can click the checkbox to Enable Auto-Reg. Note: You can do this to any VNET as long as that VNET is not linked to another Zone with Auto-reg ON. So if VNET is in another zone but Auto-reg is OFF, then you can enable Auto-Reg in Only One Zone 2. Y. You can add Vnet1 to Zone3 but make sure Auto Reg is OFF. You cannot add Vnet1 to Zone3 with Auto Reg is ON. 3. Y. You can add Vnet2 to Zone1 and set to Auto Reg ON because VNET2 has no link yet to any zone with Auto Reg ON. to summarize: Zones can have multiple VNETs. Each VNET can be set to Auto Reg ON VNETs can be linked to multiple Zones but they can only Auto Reg to one Zone

upvoted 7 times

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profesorklaus

1 year, 9 months ago

I tested it in my LAB an here are results: 1. YES - you can enable auto registration for link2 2. YES - you can add virtual network link VNET1 to zone3 3. Yes - you can add virtual network link VNET2 to zone1.

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nomanmalik101

1 year, 10 months ago

what the hell? every second question has confusion. Why are we not able to get the exact answers even after paying a huge amount? whom should we follow? Discussion or Examtopic?

upvoted 8 times

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Josete1106

1 year, 11 months ago

Y Y NO is correct!

upvoted 1 times

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Navigati0n

1 year, 11 months ago

Yes. Auto-registration can be enabled for Link2 because VNET2 is not currently a registration virtual network for any other private DNS zone. So it can become the registration virtual network for Zone2.com if auto-registration is enabled for Link2. Yes. You can create a link between VNET1 and Zone3.com. However, because VNET1 is already a registration virtual network for Zone1.com, you cannot enable auto-registration for this new link. This is because "every virtual network can only have one registration zone associated with it." No. You cannot enable auto-registration for this potential new link between VNET2 and Zone1.com because, as per the provided explanation, "every virtual network can only have one registration zone associated with it." Since VNET2 has already been linked to Zone2.com with auto-registration enabled (as per answer 1), it cannot become the registration virtual network for Zone1.com as well. https://learn.microsoft.com/en-us/azure/dns/private-dns-virtual-network-links#registration-virtual-network

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RandomNickname

2 years ago

Agree with Y,N,N Q1: Y. Looks like it needs to be done when the link is created, and doesn't specify it it can be retroactively enabled, but yes can be done. https://learn.microsoft.com/en-us/azure/dns/private-dns-autoregistration Q2 + Q3, N. Already linked. "From the virtual network perspective, private DNS zone becomes the registration zone for that virtual network. A private DNS zone can have multiple registration virtual networks. However, every virtual network can only have one registration zone associated with it" https://learn.microsoft.com/en-us/azure/dns/private-dns-virtual-network-links

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rishisoft1

2 years ago

Answer will be yes for 3. When auto-registration is not enabled while linking its called resolution means VNET is not registered with DNS and it using for resolution and one VNET can have multiple resolution . refer this for detailed info - https://learn.microsoft.com/en-us/azure/dns/private-dns-virtual-network-links

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Zonci

2 years, 1 month ago

Y Y N is the correct answer guys

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