---
title: "Switching compared with multiplexing"
subject: "Computer Networks and Security"
chapter: 2
key: "semester_7/computer_networks_and_security:switching-vs-multiplexing"
source: https://www.bctengineer.com/q/semester_7/computer_networks_and_security/switching-vs-multiplexing
site: BCT Engineering
---

# Switching compared with multiplexing

Computer Networks and Security · Chapter 2: Physical Layer

- Asked in: 2073 Shrawan, 2+2 marks
- Video: [Switching Techniques in Computer Networks](https://www.youtube.com/watch?v=-HlJ4psu5aU) — Neso Academy
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_7/computer_networks_and_security/switching-vs-multiplexing
- Whole chapter: https://www.bctengineer.com/md/semester_7/computer_networks_and_security/chapter-2

## Question

What do you mean by switching in communication? Compare switching with multiplexing.

## Short answer

Switching forwards data from input to correct output port to reach the destination, used inside network nodes. Multiplexing combines many signals onto one shared link, used at ends. Switching types: circuit, packet, message; multiplexing types: FDM, TDM, WDM.

## Answer

#### Switching
Switching is the process of forwarding data from an input port of a network node to a suitable output port so that it reaches the destination across a network. It makes connections between any two nodes without a direct link between every pair. Types are circuit, packet and message switching.

#### Comparison with multiplexing
| Point | Switching | Multiplexing |
|---|---|---|
| Purpose | Select a path between source and destination | Combine many signals onto one link |
| Used at | Inside the network (nodes/exchange) | At the ends of a link |
| Function | Routes data to the correct output | MUX combines, DEMUX separates |
| Link usage | Connects many links | Shares one link |
| Types | Circuit, packet, message | FDM, TDM, WDM |
| Aim | Reachability to the right destination | Efficient use of bandwidth |
| Devices | Switch, router | Multiplexer, demultiplexer |

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. What is the purpose of switching versus multiplexing?
   A. Switching selects a path; multiplexing combines many signals onto one link
   B. Switching combines signals; multiplexing selects paths
   C. Both combine signals
   D. Both select paths
   Answer: A. Switching connects source to destination; multiplexing shares one link. (Key point: Purpose)

2. Which lists the types of each?
   A. Switching: FDM, TDM, WDM; multiplexing: circuit, packet, message
   B. Switching: circuit, packet, message; multiplexing: FDM, TDM, WDM
   C. Both: FDM only
   D. Both: circuit only
   Answer: B. Switching types are circuit, packet and message; multiplexing types are FDM, TDM, WDM. (Key point: Types)

3. Which devices are used for multiplexing?
   A. Switch and router
   B. Multiplexer and demultiplexer
   C. Repeater only
   D. Modem only
   Answer: B. Switching uses switches/routers; multiplexing uses MUX/DEMUX. (Key point: Devices)

## Related in Computer Networks and Security

- [Define switching and multiplexing](https://www.bctengineer.com/question.md?key=semester_7%2Fcomputer_networks_and_security%3Adefine-switching-multiplexing) — Computer Networks and Security, chapter 2, asked 2×
- [Switching and why necessary](https://www.bctengineer.com/question.md?key=semester_7%2Fcomputer_networks_and_security%3Aswitching-meaning-necessity) — Computer Networks and Security, chapter 2
- [Types of data switching](https://www.bctengineer.com/question.md?key=semester_7%2Fcomputer_networks_and_security%3Atypes-of-switching) — Computer Networks and Security, chapter 2
- [Compare IPv6/IPv4 headers; migration](https://www.bctengineer.com/question.md?key=semester_7%2Fcomputer_networks_and_security%3Aipv6-ipv4-header-migration) — Computer Networks and Security, chapter 7, asked 2×

## Related in other subjects

- [Compare multiplexing techniques](https://www.bctengineer.com/question.md?key=semester_8%2Ftelecommunications%3Acompare-multiplexing-techniques) — Telecommunications, chapter 3
- [Switching techniques in data communication](https://www.bctengineer.com/question.md?key=semester_8%2Ftelecommunications%3Aswitching-techniques-data-comm) — Telecommunications, chapter 8, asked 3×
- [Compare analog and digital communication](https://www.bctengineer.com/question.md?key=semester_5%2Fdata_communication%3Adigital-vs-analog-comparison) — Data Communication, chapter 1, asked 4×
- [Multiplexing; synchronous vs asynchronous TDM](https://www.bctengineer.com/question.md?key=semester_5%2Fdata_communication%3Amux-compare-sync-async-tdm) — Data Communication, chapter 6, asked 6×