Responsibilities Of The Network Engineer Information Technology Essay
A computer network is a combination of the two or more hardware deceives and with the compatible software which allows the communication between these devices such as data and voice, video etc.
Next section going to deal with the Hardware used to build the network
Transmission Medium:
This is used to connect the transmitter and receiver. It may be guided and unguided medium.
Guided Medium:
In this type capacity based on the bandwidth rate and the distance it has to cover and type of the link ex: point to point or Multipoint
There are four transmissions medium:
Twisted-pair Cable: These are the most commonly used media generally uses RJ-45 plug. Twisted-pair contains the 4 insulated copper wires and twisted. The twisting pair reduces the effect of the Electromagnetic waves. Twisted pairs restricted in terms of data rate and distance EX: requires amplifiers every 5-6 km for analog signals and 2-3 km for digital signals. These are again divided in to two types called shielded and UN-shielded twisted-pair. STP cables are covered by an additional shield which makes more robust and reduces the electromagnetic interference
Coaxial cable:
consist of two conductors one is inner conductor and other one is shield which is generally metal foil surrounded by the inner conductor with the diameters of 1 to 2.5cm . Outer shield used to reduce the interference and cross talk. These cover more distance than twisted-pair. Generally use in cable TV and to cover long distance telephone lines. It can carry both analog and digital data, supports up to 10000 voice data using FDM.
Optical Fiber cable:
Fiber optic technology uses the light to transmit the data. It has begun in1970s. Fiber technology uses allows higher bandwidth that’s the reason used between the central offices which needs to carry high volumes of voice traffic where copper wire provides limited distance and bandwidth. Optical fiber cable...