Wireless networking
- 1. Wireless Networking By :- ADITYA RAJ Roll :- 39/cse/15005
- 2. Introduction What is a wireless network? Wireless network is an interconnection of many systems capable of providing service to mobile users within a particular geographic region (country or continent)
- 3. Radio Frequency signal (RF signal) RANGE : 30KHz to 300GHz This Signal is fall under the category of EM Waves This signal is invisible and use to send messages from one device to another device USES : FM radio station uses RF signals to broadcast signals and the frequency is used as the station name like (93.8 Red FM)
- 4. Advantages of Wireless Network over Wired (Cabled) Network Mobility: Users can roam around the network without being disconnected Installation speed and cost: Building wireless medium to large network is usually faster and cheaper than building wired (cabled) medium to large network because there is no need to pull cable through walls and ceilings Reach of network: Wireless network can be extended to places where wire/cable cannot reach Flexibility/scalability: New computers can be added easily without having to pull cable into the computers
- 5. Disadvantages of Wireless Network compared to Wired Network Speed: In general, wireless network technology is slower than wired network technology Security: In general, wireless network is less secured than wired network
- 6. Wireless Network Mode Ad-Hoc Mode (Peer-to-Peer Mode) Each wireless node can communicate directly with each of the other nodes in the network (without Wireless Access Point) Mesh network topology Infrastructure Mode All wireless node communicate to one another via Wireless Access Point Star network topology
- 8. Different Wireless Networks IrDA (Infrared Data Association) Uses beams in the infrared light spectrum Bluetooth Uses 2.45 gigahertz radio waves, Limits distance 10 to 100meters, but travels through walls HomeRF (SWAP) – developed by businesses 6 voice channels and 1 data channel Slow, and limited range, but cheap WECA (Wi-Fi) “Wireless Ethernet Compatibility Alliance”
- 9. IrDA (Infrared Data Association) Uses beams of light in the infrared spectrum Remote controls Fairly reliable and low-cost Drawback: “one-to-one” technology You can send data only between two things at once (but increased security?)
- 10. HomeRF (SWAP) Shared Wireless Access Protocol (SWAP) Developed by an alliance of businesses 6 voice channels and one data channel The data channel is the 802.11 wireless-Ethernet specification by the IEEE One drawback: SWAP can only be used with computers Printers and such need to be attached to a computer and used as a resource