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

Limited Time Offer

25%

Off

Get Premium ISO-IEC-LI Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Shawna

1 month ago

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

upvoted 0 times

...

Galen

1 month ago

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

upvoted 0 times

...

Bo

1 month ago

NFC feels more secure for payments than Bluetooth.

upvoted 0 times

...

Ernest

2 months ago

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

upvoted 0 times

...

Bettina

2 months ago

Agreed! NFC is super convenient for transactions.

upvoted 0 times

...

Gregg

2 months ago

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

upvoted 0 times

...

Reed

3 months ago

Yup, NFC is super convenient for mobile payments!

upvoted 0 times

...

Rosann

3 months ago

I thought RFID was used for payments too?

upvoted 0 times

...

Samira

3 months ago

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

upvoted 0 times

...

Ronald

3 months ago

Totally agree, NFC is the way to go!

upvoted 0 times

...

Maynard

3 months ago

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

upvoted 0 times

...

Rosita

3 months ago

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

upvoted 0 times

...

Justine

4 months ago

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

upvoted 0 times

...

Tracey

4 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.

upvoted 0 times

...

Bea

4 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.

upvoted 0 times

...

Gene

4 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.

upvoted 0 times

...

Rickie

4 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.

upvoted 0 times

...

Daisy

4 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.

upvoted 0 times

...

Glory

5 months ago

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

upvoted 0 times

...

Vernice

5 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.

upvoted 0 times

...

Lilli

5 months ago

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

upvoted 0 times

...

Timothy

5 months ago

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

upvoted 0 times

...

Jules

6 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.

upvoted 0 times

...