Types of Transmission media
Illustrate the various types of Transmission media? Describe in brief.
Expert
Signals are generally transmitted over some transmission media which are broadly categorized in two categories.
a) Guided Media: These are those which give a conduit from one device to the other which comprise twisted-pair, coaxial cable and the fiber-optic cable. The signal traveling all along any of such media is directed and is contained by the physical limits of the medium. Twisted-pair and coaxial cable use metallic which accept and transport signals in the form of electrical current. Optical fiber is a glass or plastic cable which accepts and transports signals in form of light.
b) Unguided Media: This is the wireless media which transport electromagnetic waves devoid of by using a physical conductor. Signals are broadcast either via air. This is done via radio communication, satellite communication and cellular telephony.
Untrusted networks: These networks are generally administered by owners. They can permit inappropriate access to sensitive or personal data. Such machines are generally separate. These machines could me much more prone to attacks.
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