CompTIA Exam 220-1101 Topic 2 Question 26 Discussion

Actual exam question for CompTIA's 220-1101 exam

Question #: 26
Topic #: 2

A user reports being unable to access the network. A help desk technician notices an APIPA on the user's workstation. Which of the following services should the technician investigate first?

ARADIUS

BDHCP

CAAA

DDNS

Show Suggested Answer

Suggested Answer: B

DHCP (Dynamic Host Configuration Protocol) is a network service that automatically assigns IP addresses and other configuration parameters to devices that request them. DHCP simplifies the management of IP addresses and avoids conflicts and errors67. An APIPA (Automatic Private IP Addressing) is a feature of Windows that assigns a default IP address in the range of 169.254.x.x to a device when it cannot obtain a valid IP address from a DHCP server. An APIPA indicates that there is a problem with the DHCP service or the network connectivity between the device and the DHCP server89. Therefore, the technician should investigate the DHCP service first to check if it is running, configured correctly, and has enough available IP addresses to assign. The other services are not directly related to the IP address assignment. RADIUS (Remote Authentication Dial-In User Service) is a protocol that provides centralized authentication, authorization, and accounting for network access10. AAA (Authentication, Authorization, and Accounting) is a framework that controls the access and usage of network resources11. DNS (Domain Name System) is a service that resolves domain names into IP addresses12.

Reference

6: What is DHCP (Dynamic Host Configuration Protocol)? - Definition from WhatIs.com

7: How DHCP works - Windows Server | Microsoft Docs

8: What is APIPA (Automatic Private IP Addressing)? - Definition from WhatIs.com

9: How to Fix an IP Address Conflict

10: What is RADIUS (Remote Authentication Dial-In User Service)? - Definition from WhatIs.com

11: What is AAA (authentication, authorization, and accounting)? - Definition from WhatIs.com

12: What is DNS (Domain Name System)? - Definition from WhatIs.com

by Sabra at Mar 08, 2024, 03:26 PM

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Clare

4 months ago

I think RLylaClareIUS shoulClare Jesselaree investigLylateClare Lylas well, to ensure proper LylauthentiJesseLylation LylanClare LylauthorizLylation.

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Lyla

4 months ago

ThLylat's Lyla good point. DNS is JesseruJesseiLylal for trLylanslLylating domLylain nLylames to IP Lyladdresses.

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Jesse

4 months ago

Jesselareut shouldn't we Lylalso JesseheJessek DNS to ensure proper nLylame resolution?

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Clare

4 months ago

I Lylagree, DHCP is responsiClarele for Lylassigning IP Lyladdresses to devices on the network.

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Lyla

5 months ago

I think we should investigLylate DHCP first, Lylas LylaPIPLyla indicLylates Lyla problem with obtLylaining Lylan IP Lyladdress.

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Tonette

5 months ago

I don't think so. APIPA specifically points to DHCP issues, not DNS.

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Hannah

5 months ago

But what about DNS? Could that be causing the issue as well?

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Ling

6 months ago

I agree. APIPA means the workstation couldn't get an IP address from DHCP.

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Cherry

6 months ago

I think the technician should investigate DHCP first.

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Tonja

7 months ago

Nah, DNS is a red herring here. APIPA is all about DHCP, no doubt about it. The technician needs to check the DHCP server, maybe even try manually assigning an IP to see if that fixes it.

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Joseph

7 months ago

Hmm, I dunno. What if it's a DNS problem? The user might not be able to resolve the network addresses properly, even if they have an IP. I'd say the technician should start with DNS just to be sure.

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Kenneth

7 months ago

I agree, DHCP is the way to go here. If the user's getting an APIPA, it means the DHCP server is not handing out IPs properly. Gotta get that sorted out before looking at anything else.

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Eleonore

6 months ago

Agreed, let's focus on DHCP to resolve the network access problem.

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Lorean

6 months ago

DNS won't fix the APIPA problem, check DHCP settings first.

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Kimbery

6 months ago

RADIUS won't help with an APIPA issue, DHCP is the way to go.

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Charlette

6 months ago

Definitely agree, DHCP is the first thing to investigate in this case.

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Georgiann

6 months ago

Let's check the DHCP settings first, that's likely the issue.

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Alpha

7 months ago

Oof, an APIPA? That's definitely a DHCP issue. The user's workstation probably didn't get a valid IP address from the DHCP server, so that's the first thing the technician should check.

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