Networking - Internet, ethernet, Intranet

1. Internet

➤ Definition:

The Internet is a global network of computers that are connected together to share information, access websites, communicate, and more.

➤ Key Points:

• It’s a public network accessible to anyone with an internet connection.

• Enables services like email, websites, social media, online games, etc.

• Uses TCP/IP protocols to transmit data.

• Examples: Google, YouTube, WhatsApp, Wikipedia.

➤ Use:

For communication, online learning, entertainment, business, and research.

2. Ethernet

➤ Definition:

Ethernet is a technology used to create a Local Area Network (LAN) using wired connections (usually Ethernet cables).

➤ Key Points:

• Connects devices like computers, printers, and routers within a small area (room, building).

• Provides high-speed, stable, and secure connections.

• Common in offices, schools, and homes for LAN setups.

• Uses switches and network interface cards (NICs) to connect devices.

➤ Use:

For file sharing, internet access, and printer sharing in local networks.

3. Intranet

➤ Definition:

An Intranet is a private network used within an organization (like a company or school) to share information, files, and services.

➤ Key Points:

• Only authorized users can access it (not public).

• Helps with internal communication, document management, and collaboration.

• May look like a website but is restricted to employees or members.

• Often includes portals, internal news, company policies, etc.

➤ Use:

To streamline operations, share internal information, and improve employee productivity.