International Baccalaureate IB Computer Science

Describe the functions and practical applications of network topologies.
- Network topologies: star, mesh, hybrid
- Factors to consider must include reliability, transmission speed, scalability, data collisions, cost.
- Examples may include home and small office settings, where reliability is paramount, and the use of networks in larger settings (e.g. corporations, government departments, college campuses).

- Types of servers: domain name server (DNS), dynamic host configuration protocol (DHCP), file server, mail server, proxy server, web server
- Factors to consider must include function, scalability, reliability and security.

- Client-server and peer-to-peer models
- The respective benefits and drawbacks of client-server and peer-to-peer models
- Real-world applications may include web browsing, email services, online banking, file sharing, VoIP services, blockchain.

Explain the concepts and applications of network segmentation.
- Segmentation for network performance and security, to reduce congestion, to manage network resources efficiently
- Network segmentation must include the uses and roles of segmenting, subnetting and virtual local area networks (VLANs).