Telecommunications Wireless Communications 3

Question 1

What technology allows multiple users to share the same frequency channel by assigning unique codes?

Accepted Answer

CDMA

Answer

CDMA (Code Division Multiple Access) lets multiple users transmit simultaneously on the same frequency by assigning unique codes.

Question 2

What is the purpose of a channel in wireless communications?

Accepted Answer

Define a specific frequency range for transmission

Answer

A wireless channel is a specific frequency range within a band used to transmit data without interference from adjacent channels.

Question 3

What does OFDM stand for?

Accepted Answer

Orthogonal Frequency Division Multiplexing

Answer

OFDM (Orthogonal Frequency Division Multiplexing) transmits data on multiple sub-carriers simultaneously, improving spectral efficiency.

Question 4

What is the maximum theoretical speed of 802.11ac (Wi-Fi 5)?

Accepted Answer

1.3 Gbps

Answer

802.11ac Wave 1 supports up to 1.3 Gbps using 3-stream 80 MHz channels, while Wave 2 reaches higher with MU-MIMO.

Question 5

What is Bluetooth primarily designed for?

Accepted Answer

Short-range personal area network (PAN) communication

Answer

Bluetooth is designed for short-range PAN communication, typically within 10 meters, for connecting peripherals and devices.

Telecommunications Practice Test