GAQM ISO-IEC-LI Exam - Topic 5 Question 104 Discussion

Actual exam question for GAQM's ISO-IEC-LI exam

Question #: 104
Topic #: 5

One of the ways Internet of Things (IoT) devices can communicate with each other (or 'the outside world') is using a so-called short-range radio protocol. Which kind of short-range radio protocol makes it possible to use your phone as a credit card?

ANear Field Communication (NFC)

BBluetooth

CRadio Frequency Identification (RFID)

DThe 4G protocol

Show Suggested Answer

Suggested Answer: A

by Geoffrey at Nov 25, 2025, 11:54 AM

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Shawna

1 day ago

Yes, NFC is the go-to for contactless payments!

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Galen

6 days ago

I remember reading that NFC works within a short range, perfect for credit cards.

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Bo

11 days ago

NFC feels more secure for payments than Bluetooth.

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Ernest

17 days ago

I was torn between A and C, but NFC is definitely the right choice.

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Bettina

22 days ago

Agreed! NFC is super convenient for transactions.

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Gregg

27 days ago

I think it's A) NFC. It's used for mobile payments.

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Reed

2 months ago

Yup, NFC is super convenient for mobile payments!

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Rosann

2 months ago

I thought RFID was used for payments too?

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Samira

2 months ago

Wait, is it really just NFC? I thought Bluetooth could do that too.

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Ronald

2 months ago

Totally agree, NFC is the way to go!

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Maynard

2 months ago

It's definitely A) Near Field Communication (NFC).

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Rosita

2 months ago

The 4G protocol? Haha, that's a good one. I think the exam writers are trying to trick us.

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Justine

3 months ago

Bluetooth? Really? That's for connecting headphones, not making payments.

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Tracey

3 months ago

I recall a practice question about payment methods, and I think RFID was mentioned, but it seems more related to tracking than payments.

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Bea

3 months ago

I'm not entirely sure, but I feel like Bluetooth is more for connecting devices over a longer range, so it might not be the right answer.

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Gene

3 months ago

I think the answer is A) Near Field Communication (NFC). That's the short-range radio protocol that allows you to use your phone as a credit card, right? The question is pretty straightforward, so I'm feeling good about this one.

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Rickie

3 months ago

I'm pretty confident the answer is A) Near Field Communication (NFC). That's the standard short-range protocol used for things like mobile wallets and contactless payments. The other options don't seem to fit the description in the question.

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Daisy

3 months ago

Okay, let me see. I know Bluetooth is a short-range protocol, but I don't think it's used for mobile payments. RFID is also a short-range protocol, but I'm not sure if that's the one for mobile payments. I'm leaning towards NFC, but I'll double-check my notes just to be sure.

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Glory

4 months ago

I always forget which one is NFC. Guess I need to study that more.

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Vernice

4 months ago

I think it's NFC because I remember studying how it allows devices to communicate when they're really close together, like when you tap your phone to pay.

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Lilli

4 months ago

NFC is the correct answer. It allows you to use your phone as a credit card.

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Timothy

4 months ago

The 4G protocol seems too advanced for short-range communication, so I’m leaning towards NFC as the best option here.

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Jules

5 months ago

Hmm, I'm not too sure about this one. I know NFC is used for mobile payments, but I'm not confident that's the only short-range protocol that enables that. I might need to think this through a bit more.

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Shay

5 months ago

I think the answer is A) Near Field Communication (NFC). That's the short-range radio protocol used for mobile payments, right?

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Beckie

4 months ago

NFC is the way to go for secure transactions!

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