CMT Network Technologies & Connectivity 5

Question 1

Which network technology uses Ultra-Wideband (UWB) for precise indoor positioning accurate to within centimeters?

Accepted Answer

Apple AirTag / UWB spatial awareness

Answer

UWB uses short pulses across a wide frequency spectrum to measure time-of-flight with centimeter-level accuracy, used in AirTags and precision finding.

Question 2

A technician is troubleshooting a device that cannot make emergency calls. The customer has no SIM installed. What should the technician tell the customer?

Accepted Answer

Emergency calls (911) work on any available network even without a SIM

Answer

In the US, mobile devices can place 911 emergency calls on any available carrier network even without a SIM card installed.

Question 3

What is the difference between GSM and CDMA cellular technologies regarding the SIM card?

Accepted Answer

GSM uses a SIM card for subscriber identity; CDMA traditionally stored subscriber info on the device itself

Answer

GSM networks use SIM cards to store subscriber identity, allowing easy swapping between devices, while legacy CDMA networks stored identity in the device's ESN/MEID.

Question 4

A repaired phone shows strong Wi-Fi signal but the connection drops every few minutes. The router and other devices are unaffected. What is the most likely hardware cause?

Accepted Answer

Intermittent Wi-Fi antenna connection or damaged Wi-Fi module

Answer

Periodic drops on a single device point to an intermittent antenna connection or a marginally damaged Wi-Fi chip that loses connection under thermal or physical stress.

Question 5

Which cellular technology is associated with CDMA networks and uses codes to allow multiple users to share the same frequency simultaneously?

Accepted Answer

CDMA (Code Division Multiple Access)

Answer

CDMA assigns unique spreading codes to each user, allowing all users to transmit simultaneously on the same frequency band.

(CMT) Certified Mobile Tech Practice Test

(CMT) Certified Mobile Tech Practice Test

CMT Network Technologies & Connectivity 5