1. You have decided to buy parts and build your own personal computer. At the minimum, what are the components that you would need for this device to be considered a computer? 2. What are the most important features to consider before purchasing a PC? 3. Explain the notions of WAN, LAN, MAN and PAN. 4. What are the technical advantages of optical fibres over other communications media? 5. Wi-Fi is all around us. Is there any downside to its pervasiveness?