How can you ensure that instance in an VPC does not use AWS DNS for routing DNS requests. You want to use your own managed DNS instance. How can this be achieved?

The correct answer is B. Create a new DHCP options set and replace the existing one.. In order to use your own DNS server, you need to ensure that you create a new custom DHCP options set with the IP of th custom DNS server. You cannot modify the existing set, so you need to create a new one. Option A is invalid because you cannot make changes to an existing DHCP

Submitted by tarun92· Mar 6, 2026Infrastructure Security

Question

Options

AChange the existing DHCP options set
BCreate a new DHCP options set and replace the existing one.
CChange the route table for the VPC
DChange the subnet configuration to allow DNS requests from the new DNS Server

How the community answered

(31 responses)

A
3% (1)
B
71% (22)
C
16% (5)
D
10% (3)

Explanation

In order to use your own DNS server, you need to ensure that you create a new custom DHCP options set with the IP of th custom DNS server. You cannot modify the existing set, so you need to create a new one. Option A is invalid because you cannot make changes to an existing DHCP options Set. Option C is invalid because this can only be used to work with Routes and not with a custom DNS Option D is invalid because this needs to be done at the VPC level and not at the Subnet level

Topics

#DHCP options set#VPC DNS#custom DNS server#VPC networking

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