CompTIA 220-1201 Exam - Topic 5 Question 9 Discussion

Actual exam question for CompTIA's 220-1201 exam

Question #: 9
Topic #: 5

A technician receives several complaints from the same office about VoIP calls sounding broken up, being difficult to hear, and having lagging audio. The technician arrives on-site and runs an internet speed test on several wired and wireless computers. Internet speed seems normal throughout the office. Which of the following should the technician do to fix the call issues?

AEnable QoS in the router

BConfigure PoE on the switch

CChange the encryption from WPA3 to WPA2

DTurn on MAC address filtering

Show Suggested Answer

Suggested Answer: A

Quality of Service (QoS) prioritizes VoIP traffic on the network, reducing jitter, latency, and packet loss to improve call quality.

From CompTIA A+ 220-1101 Official Study Guide, Objective 2.4 -- Network troubleshooting:

''Enabling QoS in the router ensures time-sensitive traffic, like VoIP, receives network priority, reducing dropped or lagging calls.''

Verified Source:

CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 2: Network Troubleshooting

CompTIA Exam Objectives 220-1101, Domain 2.4

by Lamar at Jul 29, 2025, 04:27 PM

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Ricki

2 months ago

MAC address filtering won't fix call quality problems.

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Evelynn

2 months ago

Changing encryption to WPA2? That seems risky!

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Claudio

3 months ago

I agree, QoS is key for prioritizing voice traffic.

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Louann

3 months ago

Are we sure the internet speed is the only factor here?

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Elenora

3 months ago

Enabling QoS can really help with VoIP issues.

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Toi

3 months ago

MAC address filtering seems unrelated to the audio problems. I think it’s more about managing bandwidth for VoIP.

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Dorthy

4 months ago

I feel like we had a practice question about VoIP issues and QoS was the answer. I hope that’s still the case!

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Shakira

4 months ago

I'm not entirely sure, but I think changing the encryption type might not really help with call quality issues.

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Maia

4 months ago

I remember we discussed QoS in class as a way to prioritize VoIP traffic. It seems like the right choice here.

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Stephaine

4 months ago

I'm pretty confident that enabling QoS in the router is the way to go here. The broken up, lagging audio suggests a bandwidth or prioritization issue, and QoS should help ensure the VoIP traffic gets the necessary bandwidth and low latency it needs.

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Keneth

4 months ago

Ah, this is a good one. Changing the encryption from WPA3 to WPA2 doesn't seem relevant to the VoIP issues, so I can probably rule that out. Turning on MAC address filtering also doesn't seem like it would fix the call quality problems.

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Tequila

5 months ago

Okay, let's see. The issue seems to be with the VoIP calls, not the internet speed, so I don't think configuring PoE on the switch is the right approach. I'm leaning towards enabling QoS, but I'll double-check the other options just to be sure.

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Sheldon

5 months ago

Hmm, this one seems tricky. I'll need to think it through carefully. Enabling QoS in the router could help prioritize the VoIP traffic, but I'm not sure if that's the best solution here.

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