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Exam AZ-104 topic 5 question 48 discussion

Actual exam question from Microsoft's AZ-104

Question #: 48
Topic #: 5

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

You configure the network interfaces of the virtual machines to use the settings shown in the following table.

From the settings of VNET1 you configure the DNS servers shown in the following exhibit.

The virtual machines can successfully connect to the DNS server that has an IP address of 192.168.10.15 and the DNS server that has an IP address of
193.77.134.10.
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 -
You can specify DNS server IP addresses in the VNet settings. The setting is applied as the default DNS server(s) for all VMs in the VNet.

Box 2: No -
You can set DNS servers per VM or cloud service to override the default network settings.

Box 3: Yes -
You can set DNS servers per VM or cloud service to override the default network settings.
Reference:
https://docs.microsoft.com/en-us/azure/virtual-network/virtual-networks-faq#name-resolution-dns

by hamzajeljeli at May 1, 2021, 10:46 p.m.

Comments

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mlantonis

Highly Voted 4 years, 1 month ago

Correct Answer: NIC configured DNS servers takes precedence over VNET configured DNS servers. Box 1: Yes VM1 uses the VNET configured DNS 193.77.134.10. You can specify DNS server IP addresses in the VNet settings. The setting is applied as the default DNS server(s) for all VMs in the VNet. The DNS is set on the VNET level. Box 2: No VM2 uses the NIC configured DNS 192.168.10.15. You can set DNS servers per VM or cloud service to override the default network settings. This VM has 192.168.10.5 set as DNS server, so it overrides the default DNS set on VNET1. Box 3: Yes VM3 uses the NIC configured DNS 192.168.10.15 You can set DNS servers per VM or cloud service to override the default network settings. This VM has 192.168.10.5 set as DNS server, so it overrides the default DNS set on VNET1.

upvoted 159 times

15fe06d

1 month ago

please why is the answer N for vm2 and yes for vm3, since both vms have the same ip address?

upvoted 1 times

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Kent_020

3 years, 7 months ago

Where did you get the '192.168.10.5' from the info given? ---------------- VM1 uses the VNET configured DNS 193.77.134.10 VM2 uses the NIC configured DNS 192.168.10.15 VM3 uses the NIC configured DNS 192.168.10.15

upvoted 4 times

odisor

3 years, 4 months ago

Both VMs have 192.168.10.15 assigned to their NICs

upvoted 2 times

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Voldemort

3 years, 9 months ago

Great Explanation Buddy!

upvoted 8 times

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lisley

2 years, 7 months ago

why are Box 2 and 3 different (Yes and No) but with the same explanation?

upvoted 9 times

Muffay

2 years, 5 months ago

Because the IP addresses in the question are different ;)

upvoted 10 times

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Alses1970

Highly Voted 4 years, 1 month ago

1. Yes - as per link the DNS is set on the VNET level 2. No - this VM has 192.168.10.5 set as DNS server so it overrides the default DNS set on VNET1 3. Yes - this VM has 192.168.10.5 set as DNS server so it overrides the default DNS set on VNET1

upvoted 31 times

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GuessWhoops

Most Recent 7 months, 2 weeks ago

It seems to be the case, but in real life, when I change the Primary DNS server in its NIC properties (ncpa.cpl) the machine got unresponsive and I needed to setup again to default in the portal to reestabilish it.

upvoted 1 times

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[Removed]

9 months ago

CORRECT Yes, None, Default DNS Srver No Yes

upvoted 2 times

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Ni22

1 year ago

tashakori

1 year, 3 months ago

Given answer is correct

upvoted 1 times

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RandomNickname

1 year, 11 months ago

Agree with Y,N,Y As far as I can find, if NIC on VM set to auto will distribute the vnet IP and scope including vnets DNS. If set as custom on the VM this will override and be prefered. https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-faq#can-i-override-my-dns-settings-on-a-per-vm-or-cloud-service-basis

upvoted 2 times

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vbohr899

2 years, 3 months ago

Cleared Exam today 26 Feb, This question was there in exam.

upvoted 2 times

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GBAU

2 years, 4 months ago

Here is my problem with this question. It is not possible to set a NICs DNS to "None". The question is invalid. It is either set to "Inherit from virtual network" or "Custom", in which case you must provide a DNS Server address. I think they wanted to test your knowledge on default DNS assignments for a NIC but couldn't bring themselves to basically put the answer to part of the question in the question as that is the way the option is worded in the portal, so they throw a "None" in. VERY POOR, it should be "Default Setting" or "Unchanged".

upvoted 1 times

GBAU

2 years, 4 months ago

PS: From my experience trying to set DNS servers using the VMs internal DNS setting can seriously screw up your VM and prevent it from getting network access. You have to change the DNS settings in Azure to reset them back to Azure managed (DHCP locally on host) to fix.

upvoted 1 times

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Mat_m0381

2 years, 9 months ago

The answer is YNY Others comment is correct, please find the link below https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-faq#can-i-override-my-dns-settings-on-a-per-vm-or-cloud-service-basis

upvoted 1 times

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EmnCours

2 years, 10 months ago

answer y/n/y

upvoted 1 times

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minix

3 years ago

came in today's exam 25/6/2022

upvoted 2 times

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Lazylinux

3 years ago

YES NO YES as per others comments

upvoted 1 times

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TtotheA2021

3 years, 4 months ago

Common guys thi question is so easy. you have too look right to the DNS, see explanation MLANTONIS he is 100% correct. most of you are confusing on the NIC and DNS, the dns ip of vm2 192.168.10.15 overrules custom ip. YNY

upvoted 2 times

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