Discuss CWNP CWNA-109 Exam Topic 4 Question 32

You are troubleshooting a controller-based AP that is unable to locate the controller. DHCP is not use and the controller is located at 10.10.10.81/24 while the AP is on the 10.10.16.0/24 network. What should be inspected to verify proper configuration?

ANTP

BBOOTH

CDNS

DAP hosts file

Suggested Answer: C

What should be inspected to verify proper configuration isDNS. DNS stands for Domain Name System and is a service that resolves hostnames to IP addresses. In a controller-based AP deployment, DNS can be used to help the AP locate the controller by using a predefined hostname such as CISCO-CAPWAP-CONTROLLER or aruba-master. The AP sends a DNS query for this hostname and receives an IP address of the controller as a response. Therefore, if DNS is not configured properly or if there is no DNS entry for the controller hostname, the AP may not be able to locate the controller. NTP, BOOTP, and AP hosts file are not relevant for this scenario.Reference:[CWNP Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 374; [CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-109], page 364.

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23 comments · newest first

Toshia 9 months ago

Totally agree, the subnet mismatch is a big red flag!

Elly 10 months ago

Wait, how can the AP even find the controller without DHCP?

Aleta 10 months ago

I think DNS might be the issue too.

Sarah 10 months ago

Definitely check the AP hosts file!

Jerilyn 11 months ago

The AP and controller are on different subnets.

Adelle 11 months ago

I vaguely recall that NTP could be relevant for time synchronization, but I don't see how that would help with the controller connection issue.

Alton 11 months ago

I'm a bit confused about the options. I thought DNS was important for resolving addresses, but does it apply here since DHCP isn't used?

Deja 11 months ago

I think we practiced a similar question where we had to check the AP's configuration settings. Could it be the AP hosts file?

Latanya 12 months ago

I remember something about the AP needing to know the controller's IP, but I'm not sure if it uses a hosts file or something else.

Bambi 12 months ago

This is a good one. I'll start by checking the AP's IP address and subnet mask to make sure it's on the correct network. Then I'll verify the controller's IP address and see if the AP can ping it directly or if there's a routing issue.

Heike 12 months ago

Okay, I think I've got this. The key is to verify the network configuration between the AP and the controller, since they are on different subnets. I'll check the routing, default gateway, and make sure the AP can reach the controller's IP address.

Annamae 1 year ago

Hmm, I'm a bit confused here. Is this a question about NTP, DHCP, or something else? I need to re-read the question carefully to make sure I understand what's being asked.

Pura 1 year ago

This seems like a pretty straightforward question about network connectivity. I'll focus on checking the basic network settings like IP addresses, subnets, and gateways.

Cory 1 year ago

I agree with Nina, DNS could be the issue here.

Nina 1 year ago

I think we should check the DNS configuration.

Melodie 1 year ago

I'm going with B) BOOTH. You know, like the controller's boot process or something. It's gotta be a typo, right?

Brittni 1 year ago

I think it's D) AP hosts file. Aren't we supposed to manually configure the controller's IP address on the AP?

Dannette 9 months ago

↳ replying to Brittni

Definitely! Without the correct entry, the AP won't find the controller.

Jade 10 months ago

↳ replying to Brittni

I agree, the AP hosts file is crucial for manual IP configuration.

Lashandra 10 months ago

↳ replying to Brittni

But what about DNS? Could that play a role too?

Jolanda 11 months ago

↳ replying to Brittni

DNS might help, but the hosts file is more direct for this issue.

Virgilio 1 year ago

The correct answer is C) DNS. The AP needs to be able to resolve the controller's hostname or IP address, and that's the responsibility of the DNS server.

Ling 1 year ago

↳ replying to Virgilio

Check the DNS configuration on the AP.

CWNP CWNA-109 Exam - Topic 4 Question 32 Discussion