Communications and Networks

almost people are now using the phone that always connected to one another. thats are the real today wireless revolutionary..

 

-Users can send and receive text messages, wireless instant messages, and pictures or video messages to and from their smart phones and other computer also device.
-the wireless revolution are grow like mushroom, that the majority of people are using it, it will be become high resolution and will get into new generation.
-with hot spot the users can check e-mail, browse the web, and access any service on the internet. Two popular Hot Spot technologies are  Wi-Fi and WiMax.
you are allowed to Click Here to read the articles about wireless revolution

Global Positioning System

-navigation system that consist of one or more earth-based receivers that accept and analyze signal that given by satellite to determine users geographic position.

how GPS work

for more information to the how Gps work you can enjoy by click mouse button on here. you will be know how actually GPS work.

LANs (local area network)

- LAN connects computers and device in a limited geographical area such as a home, office building, uniiversity college building.
-to connect the LAN actually using Ethernet wire, but naw to connected the LAN just need a wireless moderm that include WLAN.

 

Communication channel

-three types of cable are using to communicate channeil

1. Twisted-pair cable - have pair of copper wireand twisted together, TELEPHONE LINES and ETHERNET CABLES
2. Coaxial cable- that are used by television to get the channel.
3. Fiber-optic cables- transmit data as faster light,.. more powerfull then twisted-pair cable and Coaxile cable.

- why the television are using Coaxile cable...???