Connectivity Methods

Connectivity Methods

1. microwave communication short radio waves sends signals via microwave towers provides analogue or digital signal, device must be in line of sight with no obstruction between the microwave antennas

2. Bluetooth short range communication between two devices no need for wireless network hub. Range 10 metres

3. Wi-Fi connecting device via network hub long range depending on frequency compromised by obstructions e.g. metal, brick wall

4. GSM global system for mobile communication. Digitizes and compresses data. Digital mobile telephony system that is widely used in Europe and other parts of the world

5. Copper in telephone systems, pair of insulated wires twisted together. Twisted Pairs form twisted cable. Two types' unshielded twisted pairs and shielded twisted pairs (UTP) and (STP)

6. laser network send large networks of data using light beam devices in line of sight satellite to satellite communication range 10km blocked by fog or haze refracts the lights and disrupts the signal

7. 2G 2nd generation wireless technology lets you send texts, pictures, message and has some internet capabilities. "E" or "G"

   • 3G- 3rd generation allows video calls and provides fast internet. Mobile phone signal depends on location, "3G" or "H+"
     • 4G 4th generation faster connection for mobiles. five times faster than 3G meaning web access downloads and streaming is quick
       • 5G 5th generation technology fastest ever created long way to go 2020 this will mean 4K stream quality and fast download speed and less buffering

8. GPRS general packet radio services a wireless communication service provides continuous connection to the internet for mobile phone and computer users

9. wireless technologies no cables uses radio frequency signals to transmit data or instructions between computer and printer

10. Fibre thin wires. thinner the fibre the better the signal. Transmission is uni-directional can only go in one direction. Two fibre cables travelling in different directions

11. Satellite ge-ostatic orbit point to multi point communication system receives transmission and rebroadcasts to receivers

12. Infared technology LED emitting received by photodiode in the receiving device e.g. TV remote. Device must be in line of sight and only a few metres apart