Multiplexing techniques in Computer Networks - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is multiplexing in computer networks?

Multiplexing is a method that allows multiple signals or data streams to share a single communication channel or medium at the same time, increasing efficiency.

beginner

Name the three main types of multiplexing techniques.

The three main types are Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), and Wavelength Division Multiplexing (WDM).

beginner

How does Time Division Multiplexing (TDM) work?

TDM divides the channel into time slots. Each user or signal gets a specific time slot to send data, one after another, so they share the channel without overlapping.

beginner

What is Frequency Division Multiplexing (FDM)?

FDM splits the channel into different frequency bands. Each signal uses a unique frequency band to send data simultaneously without interference.

intermediate

Where is Wavelength Division Multiplexing (WDM) commonly used?

WDM is used in fiber optic communication. It sends multiple light signals at different wavelengths (colors) through the same fiber to increase data capacity.

Which multiplexing technique divides time into slots for each user?

A Time Division Multiplexing (TDM)

B Frequency Division Multiplexing (FDM)

C Wavelength Division Multiplexing (WDM)

D Code Division Multiplexing (CDM)

TDM assigns different time slots to users so they share the channel one after another.

In Frequency Division Multiplexing, how are signals separated?

A By different time slots

B By different frequency bands

C By different wavelengths

D By different codes

FDM separates signals by assigning each a unique frequency band.

Which multiplexing technique is mainly used in fiber optic cables?

A Time Division Multiplexing

B Frequency Division Multiplexing

C Space Division Multiplexing

D Wavelength Division Multiplexing

WDM uses different light wavelengths to send multiple signals through one fiber optic cable.

What is the main benefit of multiplexing?

A It increases the number of channels needed

B It separates signals by physical distance

C It allows multiple signals to share one channel efficiently

D It slows down data transmission

Multiplexing lets many signals share a single channel, making communication more efficient.

Which multiplexing technique assigns unique codes to separate signals?

A Code Division Multiplexing

B Frequency Division Multiplexing

C Time Division Multiplexing

D Wavelength Division Multiplexing

Code Division Multiplexing (CDM) uses unique codes to separate signals, unlike TDM or FDM.

Explain the difference between Time Division Multiplexing and Frequency Division Multiplexing.

Think about how the channel is shared in time versus frequency.

Describe a real-life example where multiplexing improves communication efficiency.

Consider how many people or devices use one connection at the same time.