Networks

Networks

1. LAN (Local Area Network)

   • Hardware needed
     • WiFi extender
     • Router
     • Ethernet cable
     • Network Interface Card (NIC)
     • Server
   • Devices that are connected over a small geographical area (e.g. WiFi)
   • Advantages
     • You can connect WiFi or Ethernet to your router.
     • Any household device can connect to the router.
     • Ethernet can have a range of up to 100 metres and WiFi can be extended around the house for faster data transfer speed to devices that are farther away.
     • WiFi is completely free!
   • Disadvantages
     • WiFi can be hacked by unauthorised users.
     • Both WiFi and Ethernet have limited range.
     • Ethernet or WiFi extenders cost money.
     • Ethernet costs more than WiFi.

2. WAN (Wide Area Network)

   • A connection of networks are connected over a large geographical area (e.g. the internet)
   • Hardware needed
     • Router
     • Telephone line
     • Satelite link
     • Mobile data (for GPRS)
   • Disadvantages
     • Mobile data is expensive and requires a SIM card.
     • GPRS data transfer speed can be slow in some locations.
     • You need a modem to connect.
   • Advantages
     • GPRS is good for mobile devices like phones.
     • Can be accessed using GPRS.
     • You can connect your telephone line to it to allow internet connection around the house.
     • You get modems that are built-in to your routers nowadays.

3. WPAN (Wireless Personal Area Network.

   • Two or more devices that are connected to each other via Bluetooth or GPRS (General Packet Radio Service).
   • Hardware needed
     • iPhone or iPad to host Bluetooth or GPRS connection
   • Advantages
     • Bluetooth can be used on the move.
     • Bluetooth doesn't use up mobile data.
     • Up to 7 devices can be connected to one Bluetooth connection at once.
   • Disadvantages
     • Bluetooth can be hacked by unauthorised users.
     • Bluetooth range is quite small.