In data communication terminology, a transmission medium is a physical path between the transmitter and the receiver i.e. it is the channel through which data is sent from one place to another. Transmission Media is broadly classified into the following types: Show 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.
There are 3 major types of Guided Media: (i) Twisted Pair Cable –
Advantages: ⇢ Least expensive ⇢ Easy to install ⇢ High-speed capacity Disadvantages: ⇢ Susceptible to external interference ⇢ Lower capacity and performance in comparison to STP ⇢ Short distance transmission due to attenuation
Advantages: ⇢ Better performance at a higher data rate in comparison to UTP ⇢ Eliminates crosstalk ⇢ Comparatively faster Disadvantages: ⇢ Comparatively difficult to install and manufacture ⇢ More expensive ⇢ Bulky (ii)
Coaxial Cable – Advantages:
Disadvantages:
(iii) Optical Fiber Cable – The cable can be unidirectional or bidirectional. The WDM (Wavelength Division Multiplexer) supports two modes, namely unidirectional and bidirectional mode. Advantages:
Disadvantages:
(iv) Stripline Stripline is a transverse electromagnetic (TEM) transmission line medium invented by Robert M. Barrett of the Air Force Cambridge Research Centre in the 1950s. Stripline is the earliest form of the planar transmission line. It uses a conducting material to transmit high-frequency waves it is also called a waveguide. This conducting material is sandwiched between two layers of the ground plane which are usually shorted to provide EMI immunity. (v) Microstripline In this, the conducting material is separated from the ground plane by a layer of dielectric. 2. Unguided
Media: Features:
There are 3 types of Signals transmitted through unguided media: (i) Radio waves – Further Categorized as (i) Terrestrial and (ii) Satellite. (ii) Microwaves – (iii) Infrared – What is the role of transmission medium in a network?The transmission medium can be defined as a pathway that can transmit information from a sender to a receiver. Transmission media are located below the physical layer and are controlled by the physical layer. Transmission media are also called communication channels.
What is transmission medium What are the different types of transmission medium?Transmission media is of two types are wired media and wireless media. In wired media, medium characteristics are more important whereas, in wireless media, signal characteristics are more important.
What are the different transmission types used in networking?This is the most frequently used type of transmission media and it is available in two types.. UTP (Unshielded Twisted Pair) This UTP cable has the capacity to block interference. ... . STP (Shielded Twisted Pair) ... . Bandwidth. ... . Radiation. ... . Absorption of Noise. ... . Attenuation. ... . Attenuation. ... . Distortion.. What are 4 types of transmission media?This is the most frequently used type of transmission media and it is available in two types.. UTP (Unshielded Twisted Pair) This UTP cable has the capacity to block interference. ... . Shielded Twisted Pair. ... . B) Coaxial Cable. ... . C) Optical Fiber Cable. ... . Satellite Microwave.. |