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TRANSMISSION MEDIA. In order to carry the data packets from one node to another on a network some sort of media must be employed. The most common types of ...more details
www.dmccormick.org/transmissionMedia.htm - 44k -
Posted by waqasahmad
Signals are usually transmitted over some transmission media that are broadly classified in to two categories:-
Guided Media:
These are those that provide a conduit from one device to another that include twisted-pair, coaxial cable and fiber-optic cable. A signal traveling along any of these media is directed and is contained by the physical limits of the medium. Twisted-pair and coaxial cable use metallic that accept and transport signals in the form of electrical current. Optical fiber is a glass or plastic cable that accepts and transports signals in the form of light.
Unguided Media:
This is the wireless media that transport electromagnetic waves without using a physical conductor. Signals are broadcast either through air. This is done through radio communication, satellite communication and cellular telephony.
Posted by jaren
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