Teaching wide area networks (WAN) can be an engaging and interactive way to explore how technology connects people and organisations across vast distances. The concept of WAN, as outlined in the curriculum, provides an excellent opportunity to demonstrate practical applications of networking in everyday life. WANs power the internet and global communication, making the topic highly relatable to students.

To make the topic practical and interactive, consider the following ideas:

Comparing Networks

Begin by distinguishing between LAN (Local Area Network) and WAN in a way students can visualise. Use a simple classroom activity:

• Activity Idea: Arrange desks in clusters representing LANs and connect them with string (or virtual lines on a projector). Show how these clusters can connect across the room using another layer of string, representing WAN. Label each segment to highlight connections.

This activity demonstrates how smaller networks combine into a larger one.

The Internet as a WAN (GAN)

The internet is the most well-known example of a WAN (also referred to as a GAN). Explain its role and how it functions:

• Use a diagram to map out the journey of a webpage request, starting from a computer at home to servers located globally. Illustrate the role of routers, ISPs, and data centres.
• Discussion Prompt: “What would happen if a major WAN link were disrupted? How might it affect global communications?”

Hands-on WAN Simulation

If resources permit, simulate a WAN in the classroom:

• Online Tools: Use free tools like Cisco Packet Tracer to design simple WAN layouts, such as connecting a “home network” to a “remote office.”
• Alternatively, map an imaginary organisation with several branches (like a chain of stores) and discuss how they might communicate using WAN technologies.

This approach caters to Bloom’s taxonomy by moving from understanding to application.

Exploring Internet Services

Introduce internet services enabled by WANs:

• Streaming and File Sharing: Explain these concepts by asking students to compare streaming a movie versus downloading it.
• Grid and Cloud Computing: Discuss how WANs support technologies like Google Drive or Microsoft 365.
• Practical Connection: Have students brainstorm or research how their favourite apps or online tools use WAN infrastructure.

This helps contextualise WAN’s utility in their lives.

WAN Technologies in South Africa

Highlight examples specific to South Africa:

• Discuss broadband options like fibre and wireless connections, including the advantages, disadvantages, and limitations of each.
• Explore local government services available online, such as e-filing or Home Affairs services, showcasing how WANs make these possible.
• Homework Idea: Ask students to interview a family member about their internet usage and identify how WAN technologies are involved.

Making Connections to Current Issues

Discuss challenges such as:

• Throttling and Shaping: Explain how ISPs manage bandwidth.
• Fair Use Policies: Link this to how students consume data at home.
• Cybersecurity issues like eavesdropping and data theft in WANs, tying in discussions on VPNs or encryption.

Use real-life examples to explain the importance of these practices.

Real-World WAN Applications

For a more engaging wrap-up, introduce practical uses:

• Examples include how businesses like banks rely on WANs for ATMs or how online learning platforms deliver content.

Encourage students to reflect on how WANs impact their daily routines, from online shopping to video conferencing.