Wireless Networks

Wireless Networks

1. Advantages and disadvantages

   • no need for cabling.
   • computers can be used anywhere within range of the signal.
   • data transmission speeds can be slow.
   • data signals can only be received within a limited range.
   • security may be a problem as people may be able to pick up the data signals outside your premises. Careful setting up of the network is needed.

2. A wireless hub is connected to the network and transmits and receives data from the computers.

3. Portable devices

   • Carried anywhere, e.g. phones and laptops
   • In built network interface cards needed for wireless connection
     • Drivers as well, to allow hardware to connect to the card
   • PDA
     • calculation, clock and calendar, address book, accessing the Internet, sending and receiving E-mails, digital photos or video recording, word processing, spreadsheets, scanning bar codes, use as a radio or music player, playing computer games, recording survey responses, and Global Positioning System (GPS) or satellite navigation systems.
     • Many PDAs can access networks (the Internet, intranets or extranets) via Wireless Networks.
   • Can be connected to computer networks via USB
   • Mobile networking
     • Wireless network distributed over land areas called "cells", different frq. to avoid inteference
     • 3G, 4G etc.

4. hotspots

   • Place of signals for connecting to wireless networks

5. Wireless router

   • A wireless router is a device that performs the functions of a router but also includes the functions of a wireless access point
   • conected to a modem, which connects to the telephone lines, then the wireless router becomes an access point.
   • Forward data packets between computers

6. Cloud computing

   • Cloud computing is computing in which large groups of remote servers are networked to allow centralized data storage and online access to computer services or resources. Clouds can be classified as public, private or hybrid.

7. Thethering connection of the phone or tablet with other devices can be done over LAN