What is a Network?

• A network is a group of computers connected together to share resources and information.
• The connection between multiple networks forms the internet.

History of the Internet

• Started during the Cold War between the US and Russia as a means to ensure reliable communication.

World Wide Web (WWW)

• The WWW is a system for sharing information over the internet.
• It allows users to view websites and documents through web browsers.
• It was founded to help researchers share data easily, no matter their location.
• The web consists of a collection of pages, interconnected via hyperlinks.

Protocols

• Protocols are predefined rules or steps that the internet follows during data transmission.
• Different protocols are used depending on the need (e.g., sending a high-quality video without losing any frames).
• The Internet Society manages all protocols.

Packets

• Packets are small units of data sent over a network.