CTA Wireless Communications & Mobile Technologies

Question 1

Which generation of mobile technology first introduced packet-switched data services alongside circuit-switched voice in the US?

Accepted Answer

2G (GPRS/EDGE)

Answer

2G networks introduced GPRS and EDGE, enabling packet-switched data while still supporting circuit-switched voice calls.

Question 2

What does the term 'handoff' (or handover) refer to in cellular networks?

Accepted Answer

Transferring an active call from one base station to another

Answer

Handoff is the process of transferring an ongoing call or data session from one cell tower (base station) to another as the user moves.

Question 3

In the US, which spectrum band is commonly referred to as 'low-band' 5G and offers the widest coverage?

Accepted Answer

Sub-1 GHz bands (600–900 MHz)

Answer

Sub-1 GHz spectrum (such as 600 MHz and 700 MHz) propagates farther with better building penetration, making it ideal for wide-area 5G coverage.

Question 4

What is the primary purpose of MIMO (Multiple-Input Multiple-Output) technology in wireless systems?

Accepted Answer

To increase spectral efficiency and throughput using multiple antennas

Answer

MIMO uses multiple antennas at both transmitter and receiver to send and receive more data simultaneously, improving spectral efficiency.

Question 5

Which wireless standard defines Wi-Fi 6 (802.11ax)?

Accepted Answer

IEEE 802.11ax

Answer

Wi-Fi 6 is formally defined by the IEEE 802.11ax standard, introducing OFDMA and BSS coloring for improved efficiency in dense environments.

CTA - Certified Telecommunications Analyst Practice Test