Discuss VMware 2V0-15.25 Exam Topic 1 Question 13

An administrator created a new VPC with an associated subnet, configured with a DHCP Server.

When attaching virtual machines to the VPC subnet, an IP address is assigned, but the DNS and NTP settings are not configured.

How can the administrator update the DHCP server configuration to set DNS and NTP?

AUpdate the default VPC Service Profile to include the IP addresses for the DNS and NTP servers.

BChange the DHCP Server mode from DHCP Server to DHCP Relay.

CEnable DNS and NTP Passthrough on the DHCP Server.

DSwitch the DHCP Network mode from Distributed Connectivity to Centralized Connectivity.

Suggested Answer: A

In VMware Cloud Foundation 9.0 Automation, each VPC is governed by a VPC Service Profile, which defines the default network services applied to the VPC's DHCP server---this includes DNS servers, NTP servers, DHCP lease values, and other network attributes. When a subnet is associated with a VPC and DHCP is enabled, the DHCP service inherits its DNS and NTP configuration from the VPC Service Profile.

In the scenario, virtual machines attached to the new VPC subnet receive an IP address, but not DNS or NTP settings. This indicates that the DHCP server is functioning correctly, but its service profile lacks DNS and NTP configuration. Updating the default VPC Service Profile allows the administrator to specify DNS resolver addresses and NTP time sources, which will then automatically be pushed to all DHCP-enabled subnets under that VPC.

Option B (changing to DHCP Relay) is incorrect because relay mode does not configure DNS/NTP---it delegates DHCP to an external DHCP server. Option C (enable DNS/NTP passthrough) is not a feature of NSX DHCP. Option D (changing connectivity mode) affects routing and service placement, not DHCP options.

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12 comments · newest first

Shanda 2 months ago

Option D could work too, but it feels more complex than necessary.

Andrew 2 months ago

I’m leaning towards C. Enabling passthrough seems efficient.

Iola 2 months ago

I think option A is the best choice. It directly updates the service profile.

Cherelle 2 months ago

C) doesn't seem like it would work, honestly.

Kris 3 months ago

D) sounds right, but I prefer A) for clarity.

Ona 3 months ago

Surprised that DNS and NTP aren't set by default!

Solange 3 months ago

I think B) is a bit off, DHCP Relay isn't for that.

Herminia 3 months ago

A) is the way to go for DNS and NTP settings!

Kimbery 3 months ago

I feel like switching modes could be a factor, but I can't remember if D is relevant to DNS and NTP settings specifically.

Hassie 4 months ago

I’m a bit confused about the difference between DHCP Server and DHCP Relay. I feel like B might not be the right option, but I can't recall the specifics.

Martina 4 months ago

I remember a practice question where we had to configure DNS settings, and I think enabling passthrough was mentioned. So maybe C could be the right choice?

Peggy 4 months ago

I think the answer might be A, but I'm not entirely sure if it’s the default VPC Service Profile that needs updating.

VMware 2V0-15.25 Exam - Topic 1 Question 13 Discussion