Aims and Objectives Wireless types Wireless Devices Standards What are the options for specific situations Wireless Devices The devices needed to make a wireless network Standards Who makes and set the standards The Next stage Wireless Electricity!

Wireless Networking Options Ad-Hoc mode Similar to using crossover cable for wired Ethernet

Wireless Networking Options Infrastructure mode Similar to using a hub or switch Requires Wireless Access Point Link to wired LAN and/or WAN (Internet)

Fixed wireless hardware Network Interface Cards Wireless Access Points Combined devices very common e.g. access point router switch Firewall etc.

Fixed Wireless Networking Standards Institute of Electrical and Electronics Engineers (IEEE) 1997 802.11 2Mbps ** Obsolete ** 1999 802.11a 54Mbps 1999 802.11b 11Mbps 2003 802.11g 54Mbps (Backwards compatible with 802.11b) 2008 802.11n 600Mbps Range upto 2300m

What stops WiFi working? WiFi has 11 channels so changing channel may help avoid interference Interference Cordless phones Microwave ovens Wireless keyboards & mice Obstructions Walls / ceilings / floors Furniture Try moving the position of the wireless access point

MiMo multiple-input multiple-output One of the major improvements with 802.11n Data sent by multiple paths Helps signal to work round obstructions and avoid throughput Up to 10x faster than 802.11g Wireless Electricity http://www.youtube.com/results?search_type=&search_query=wireless+electricity&aq=1&oq=wireless+ Note the multiple aerials

Hybrid network  Internet WAP Modem Router WAP = Wireless Access Point Switch WAP needs to be positioned to give good coverage of required areas