Learn: What a Network Is (and Why We Use Them)

Welcome!Today we'll learn about networks and their importance in computing. Networks allow devices to communicate and share resources, making them essential in our digital world.

What is a Network?A network is a collection of interconnected devices that can share data and resources. Networks can range from small setups in homes to large-scale systems in companies.

Why Do We Use Networks?Networks let us share files, communicate, and access services such as the internet. A network also improves efficiency by reducing the need for physical transfers of data.

Types of NetworksThere are two main types of networks:LAN (Local Area Network) — A network within a small area, like a home or school.WAN (Wide Area Network) — A larger network that spans multiple locations, such as the internet.

Network HardwareDevices and tools are needed to create a network:Router — Directs data between networks.Switch — Connects devices within a network.NIC (Network Interface Card) — Allows a device to connect to a network.Transmission Media — Wired cables (e.g., Ethernet) or wireless signals (e.g., Wi-Fi).

Network TopologiesNetworks can be arranged in different layouts:Star Topology — All devices connect to a central hub or switch.Mesh Topology — Devices connect directly to multiple other devices.Each topology has advantages and disadvantages depending on the situation.

Wired vs Wireless NetworksNetworks can connect devices using:Wired connections (e.g., Ethernet) — Reliable and fast but less portable.Wireless connections (e.g., Wi-Fi) — Portable and convenient but can be slower.

Review Time!Great work! You've learned about networks, their importance, types, hardware, topologies, and connection methods. Now let's test your understanding with some questions.