---
title: "Short note: Internet / Intranet"
subject: "Basic Electronics Engineering"
chapter: 5
key: "semester_2/basic_electronics_engineering:short-note-internet-intranet"
source: https://www.bctengineer.com/q/semester_2/basic_electronics_engineering/short-note-internet-intranet
site: BCT Engineering
---

# Short note: Internet / Intranet

Basic Electronics Engineering · Chapter 5: Communication System

- Asked in: 2069 Poush, 4 marks
- Video: [Difference between Internet, Intranet and Extranet](https://www.youtube.com/watch?v=HEzN3B_aXE4) — Waqas Tech Videos
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_2/basic_electronics_engineering/short-note-internet-intranet
- Whole chapter: https://www.bctengineer.com/md/semester_2/basic_electronics_engineering/chapter-5

## Question

Write a short note on Internet / Intranet.

## Short answer

The Internet is a global public network of interconnected computers using TCP/IP, providing services like WWW and email. An intranet is a private, organization-wide network that uses the same internet technologies but restricts access to authorized users via firewalls, for internal communication and resource sharing.

## Answer

#### Internet

The **Internet** is a worldwide public network of interconnected computer networks that use the TCP/IP protocol suite. It allows users anywhere to exchange information through services such as the World Wide Web (HTTP), e-mail (SMTP), file transfer (FTP), social media and video calls. It has no single owner, and its networks are linked through ISPs, backbone routers, optical fiber and satellite links.

#### Intranet

An **intranet** is a private network within one organization (a college, a bank, a company) that uses the same technology as the Internet (TCP/IP, web browsers, web servers) but is accessible only to authorised members. A firewall protects it from outside access.

| Point | Internet | Intranet |
|---|---|---|
| Access | Public, open to everyone | Private, only authorised users |
| Ownership | No single owner | One organization |
| Scope | Global | Within the organization |
| Security | Lower | Higher (firewall, login) |
| Content | General information | Internal documents, mail, databases |

Uses of an intranet: internal e-mail, file sharing, student or employee records, notices and resource sharing. An extranet extends an intranet to selected outsiders, such as customers and suppliers.

## Check yourself

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

1. What describes the Internet?
   A. A worldwide public network of networks using TCP/IP
   B. A private network of one organization
   C. A single computer network owned by one ISP
   D. A network that works only within one building
   Answer: A. The answer states this: A worldwide public network of networks using TCP/IP. (Key point: Internet definition)

2. An intranet is accessible to:
   A. Everyone worldwide
   B. Only authorised members of one organization
   C. Only ISPs
   D. Only customers and suppliers
   Answer: B. The answer states this: Only authorised members of one organization. (Key point: Intranet access)

3. Which comparison is correct?
   A. Internet is more secure than an intranet
   B. Both have no security
   C. Intranet security is higher (firewall, login) than the Internet
   D. Intranet is public, Internet is private
   Answer: C. The answer states this: Intranet security is higher (firewall, login) than the Internet. (Key point: Security difference)

4. An extranet is:
   A. Another name for the Internet
   B. A network with no TCP/IP
   C. A network inside a single computer
   D. An intranet extended to selected outsiders such as customers and suppliers
   Answer: D. The answer states this: An intranet extended to selected outsiders such as customers and suppliers. (Key point: Extranet)

## Related in other subjects

- [Internet vs Intranet and DNS need](https://www.bctengineer.com/question.md?key=semester_8%2Finternet_and_intranet%3Ainternet-intranet-compare-dns) — Internet and Intranet, chapter 1
- [Intranet vs Internet, firewall, content filtering](https://www.bctengineer.com/question.md?key=semester_8%2Finternet_and_intranet%3Aintranet-internet-benefits-firewall) — Internet and Intranet, chapter 1
- [Intranet, Internet, Extranet comparison and resources](https://www.bctengineer.com/question.md?key=semester_8%2Finternet_and_intranet%3Aintranet-internet-extranet-compare) — Internet and Intranet, chapter 1
- [Intranet vs Internet and intranet protocols](https://www.bctengineer.com/question.md?key=semester_8%2Finternet_and_intranet%3Aintranet-vs-internet-protocols) — Internet and Intranet, chapter 1