Mobile Device Network Connections

Question 1

What does the “G” stand for in 2G, 3G, 4G, and 5G?

Answer 1

“G” stands for Generation in mobile cellular technology.

Question 2

What technology does GSM use for channel access?

Answer 2

Time Division Multiple Access (TDMA)

Question 3

What are GPRS and EDGE?

Answer 3

GPRS (2.5G): No significant speed increase

EDGE (2.75G): Enhanced Data rate for GSM Evolution, improved data performance over GPRS

Question 4

What is CDMA and what does it use?

Answer 4

Code-Division Multiple Access (CDMA)

Uses Preferred Roaming Lists (PRLs) to manage roaming

Question 5

What are the 3G technologies in Europe and North America?

Answer 5

UMTS: Used in Europe

CDMA2000: Used in North America

Minimum speed: 144 Kbps

Question 6

What defines 4G networks?

Answer 6

Minimum 100 Mbps

Early tech: WiMAX and LTE

Later: Mobile WiMAX Release 2 and LTE Advanced

Question 7

What is 5G capable of in terms of speed and performance enhancements?

Answer 7

Speeds: 50 Mbps to 1 Gbps

Uses millimeter wave (mmWave) bands

Supports MIMO (Multiple Input, Multiple Output)

Question 8

What is a hotspot?

Answer 8

Turns a mobile device into a cellular access point (AP)

Shares mobile connection with other devices via Wi-Fi

Question 9

What are the key Bluetooth standards and speeds?

Answer 9

1.1: 1 Mbps (legacy)

2.0 + EDR: 3 Mbps

3.0 + HS: 24 Mbps (via Wi-Fi)

4.0: Low Energy (LE), optimized for IoT

Question 10

How does GPS determine a device’s location?

Answer 10

Uses trilateration with signals from at least three satellites

Calculates location based on distance, speed, and time traveled