9618 · 2.1
Networks including the internet — FAQ
Frequently asked questions for 9618 Networks including the internet. Direct answers first, then deeper explanation — then practise with marking.
Is Wi-Fi a network type like LAN or WAN?
Not exactly. Wi-Fi is a technology, a set of protocols for wireless communication. You use Wi-Fi to create a WLAN (Wireless Local Area Network). So, Wi-Fi is the method, while WLAN is the resulting network type, which is a form of LAN.
If P2P is so resilient, why isn't the whole internet P2P?
While P2P has advantages for specific tasks like file sharing, the client-server model is essential for services that require authority, consistency, and trust. For example, you need a central, authoritative server for your bank account details or for a search engine like Google to index the web. A P2P model would be chaotic and insecure for these applications.
What is the difference between a router and a switch?
A switch operates at the LAN level to connect devices within the same network (e.g., connecting your PC, printer, and games console at home). A router is a 'smarter' device that connects different networks together and routes traffic between them (e.g., connecting your home LAN to the internet WAN). Your home 'router' is often a combination device that includes a router, a switch, and a wireless access point.