Archive for April, 2010
Tuesday, April 27th, 2010
| Communication method |
AKA |
Description |
Uses |
Advantages |
Disadvantages |
Bandwidth |
frequency |
Date introduced |
| Bluetooth |
(IEEE) 802.15.1 standard |
Bluetooth is a short range wireless technology that is designed so that you will not to use cables between devices. |
Can be widely used for headsets, music players, printers, phones, cameras, and laptops. |
Low cost. |
Short range. |
115 Mbps. |
2.4 to 2.485 GHz. |
September 1998. |
| Infrared |
IR |
Infrared wireless technology is low power, short range wireless technology. |
Can be used for
- Multimedia projector
- PDA
- Printer
- Remote control
- Wireless mouse
- Wireless keyboard
|
It is practical, short range connection which is free. |
Limited to only be able to use it at a few feet or meters/slow. |
155.2 Kbps. |
36 KHz. |
Autumn 1987. |
| Cellular WAN |
GPS, SMS. |
Cellular WAN connections are a powerful two way wireless networks. |
Enables the transfer of voice, video, and data simultaneously. It also enables the use of laptops and portable devices remotely |
Powerful |
Slower than DSL cable connections. |
200 Kbps |
800- 1900 Mhz. |
Late 1970’s. |
| Wi-Fi |
IEEE 802.11a-n wireless. |
Wireless Fidelity (Wi-Fi) is a wireless technology that provides simple connection from anywhere within the range. |
Laptops, PDA’s, and mobile phones. |
Simple solution for network connectivity because ease of access/ work up to 300ft away. |
Concerns with security. |
54 Mbps |
2.4-5 GHz |
1999-2006 |
| Satellite |
|
Satellite Internet connections use two-way data channels. One channel is used for uploading and another for downloading. Both download and upload can be accomplished using a satellite connection. |
High speed broadband. |
High speed. |
Adverse weather conditions can interfere with satellite reception. |
Download speeds are typically in the 500 Kbps range, while uploads are around 50 Kbps. |
500 Kbs, 50 Kbs. |
6-6 GHz |
Posted in Uncategorized | No Comments »