Give two example of transmission
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1. Guided Media:
It is also referred to as Wired or Bounded transmission media. Signals being transmitted are directed and confined in a narrow pathway by using physical links.
Features:
High Speed
Secure
Used for comparatively shorter distances
There are 3 major types of Guided Media:
(i) Twisted Pair Cable –
It consists of 2 separately insulated conductor wires wound about each other. Generally, several such pairs are bundled together in a protective sheath. They are the most widely used Transmission Media. Twisted Pair is of two types:
Unshielded Twisted Pair (UTP):
This type of cable has the ability to block interference and does not depend on a physical shield for this purpose. It is used for telephonic applications.
Advantages:
Least expensive
Easy to install
High-speed capacity
Susceptible to external interference
Lower capacity and performance in comparison to STP
Short distance transmission due to attenuation
Shielded Twisted Pair (STP):
This type of cable consists of a special jacket to block external interference. It is used in fast-data-rate Ethernet and in voice and data channels of telephone lines.
Advantages:
Better performance at a higher data rate in comparison to UTP
Eliminates crosstalk
Comparatively faster
Comparatively difficult to install and manufacture
More expensive
Bulky