 |
 |
|
|
Custom Search
|
Network
media
The possible media for network communication are:-
•
Conductive: twisted pairs and coaxial cables
•
Electromagnetic: microwave
•
Light:
lasers and optical fibers (need clear line of sight)
•
Wireless –
inner/outerspace (wi-fi, Bluetooth,wi-max etc), satellite
Presently we will discuss about the physical or guided
distribution media only the wireless will be discussed later in another
article.
Presently there are 3 types of cables used in
Networking they are:-
Twisted
Pair
cables
Coaxial cables
Fiberoptic Cables.
Twisted Pair :
There are many types of cables used here they are :-
|
Category |
Maximum data rate |
|
CAT 1 |
Less than 1 Mbps |
|
CAT 2 |
4 Mbps |
|
CAT 3 |
16 Mbps |
|
CAT 4 |
20 Mbps |
|
CAT 5 |
100 Mbps |
While cat 1 is our normal landline telephone cable cat5 cable is generally used in fast Ethernet networking.
 |
 |
Optical fiber (or "fiber optic") refers
to the medium and the technology
associated with the transmission of information as light pulses along a
glass or plastic wire or fiber. Optical fiber carries much more
information than conventional copper wire and is in general not subject to
electromagnetic interference and the need to retransmit signals. Most
telephone company long-distance lines are now of optical fiber.
Transmission on optical fiber wire requires repeater at distance intervals. The glass fiber requires more protection within an outer cable than copper. For these reasons and because the installation of any new wiring is labor-intensive, few communities yet have optical fiber wires or cables from the phone company's branch office to local customers (known as local loop).
single mode fiber fiber is used for longer distances; multimode fiber fiber is used for shorter distances.
These had a greater capacity (in g.b’s)
|
|
|
