CMT Network Technologies & Connectivity 3

Question 1

What technology allows a mobile device to communicate with a payment terminal by tapping within a few centimeters?

Accepted Answer

NFC

Answer

Near Field Communication (NFC) operates at 13.56 MHz over distances of up to ~4 cm, making it ideal for contactless payments.

Question 2

Which cellular generation first introduced true broadband mobile internet with theoretical peak speeds exceeding 100 Mbps?

Accepted Answer

4G LTE

Answer

4G LTE was the first cellular standard to deliver true broadband speeds, with theoretical peaks over 100 Mbps for mobile users.

Question 3

What is the function of carrier aggregation in LTE-Advanced and 5G networks?

Accepted Answer

Bonds multiple frequency bands together to increase total bandwidth

Answer

Carrier aggregation combines two or more LTE/5G frequency bands simultaneously, effectively multiplying available bandwidth for higher speeds.

Question 4

A customer reports their phone drops calls whenever they walk to a specific area of their home. Which component is LEAST likely to be the cause?

Accepted Answer

Failing GPS module

Answer

GPS is a receive-only positioning system and has no effect on cellular voice calls or signal strength.

Question 5

What does the term 'roaming' mean in mobile networking?

Accepted Answer

Connecting to a partner carrier's network outside your home coverage area

Answer

Roaming occurs when a device connects to a partner carrier's infrastructure because the home carrier has no coverage in that area.

(CMT) Certified Mobile Tech Practice Test