Computer Networks and Their Types
We find out why computers are connected into networks, what types of network exist (LAN, WAN), the main devices, and what an IP address is.
All topics (8 of 11)
Chapter 1. Spreadsheets
Chapter 2. Databases
Chapter 3. Computer Networks and the Web
Chapter 4. Number Systems
A computer network is a set of computers and other devices connected to exchange data. A network lets us share files, use a single printer together, connect to the Internet and work collaboratively. Each computer in a network is called a node.
Networks are divided into types by their coverage. A local area network (LAN) joins computers in one room, school or office. Regional and wide area networks (WAN) connect cities and countries; the largest global network is the Internet. The connection can be wired (cable) or wireless (Wi‑Fi).
A network has several main devices: a network card connects a computer to the network, a router links networks and sends data along the right route, and a server provides services to other computers. Every device has a unique numeric address called an IP address, for example 192.168.0.15; data reaches the right computer by this address.
Key takeaways
- A network is a set of computers connected to exchange data.
- A LAN is local, a WAN covers a large area.
- A router links networks and directs data.
- An IP address identifies a device in the network uniquely.
Practice tasks
- Draw a diagram of your school computer room’s network: computers, a switch, a printer and the access point to the Internet (a router).
- List the devices at home that are connected to the network and say which are wired and which are wireless.
- Compare LAN and WAN in a table (coverage, example, type of connection).
Review questions
Test yourself: think first, then reveal the answer.
1What is a local area network (LAN)?Show answerHide answer
A network joining computers within one room, building or office.2What is an IP address for?Show answerHide answer
To identify a device in the network uniquely and deliver data to the right place.
0 of 11 topics completed
Sign in to mark