Computer networks are a core topic in IB Computer Science because they explain how devices communicate and share data. Students are expected to understand what a network is, why networks exist, and how different types of networks are classified based on size and purpose.
In IB exams, vague definitions such as “computers connected together” are not enough. Clear explanations using correct terminology are required.
What Is a Computer Network?
A computer network is a group of devices that are connected so they can:
- Share data
- Share resources
- Communicate with each other
Devices on a network may include:
- Computers
- Servers
- Printers
- Smartphones
- IoT devices
Networks allow efficient communication and reduce the need for duplicated hardware and data.
Why Computer Networks Are Used
Networks exist to:
- Enable file sharing
- Allow shared access to hardware (printers, storage)
- Support communication (email, messaging)
- Allow remote access to data and services
In IB Computer Science, networks are often linked to efficiency, collaboration, and scalability.
Local Area Network (LAN)
A Local Area Network (LAN) covers a small geographical area.
Examples include:
