guided media in computer network

                   guided media in computer network

Today articles learn guided media in computer networks. computer networking a communication two or more devices.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 a place to another. Transmission Media is broadly classified into the following types:

The characteristics and quality of data transmission are determined both by the characteristics of the medium and the characteristics of the signal. In the case of guided media, the medium itself is more important in determining the limitations of transmission.

For unguided media, the bandwidth of the signal produced by the transmitting antenna is more important than the medium in determining transmission characteristics. One key property of signals transmitted by the antenna is directionality. In general, signals at lower frequencies are omnidirectional; that is, the signal propagates in all directions from the antenna. At higher frequencies, it is possible to focus the signal into a directional beam.

In considering the design of data transmission systems, a key concern, generally, is data rate and distance: the greater the data rate and distance, the better. A number of design factors relating to the transmission medium and to the signal determines the data rate and distance. previous tutorial unguided media follow the link https://qnainterviewa.blogspot.com/2019/10/transmission-media-in-computer-network.html   so let's start a guided media in computer network.

guided media:

 guided media includes everything that guides the transmission that usually takes the form of some sort of a wire usually copper can also be Optical Fibre

 transmission capacity depends on the distance and whether the medium is a point to point or multipoint

 1. twisted pair cable :

 twisted pair cable has become the dominated cable for all new network designed at employee copper cable among the several reasons for the popularity of twisted pair cable the most significant is its low-cost twisted pair cable is inexpensive to install and offers per the foot of any cable type.

• Unshielded Twisted Pair (UTP)
• Shielded Twisted Pair (STP)

An Unshielded Twisted Pair Cable

It is the most common type of telecommunication when compared with Shielded Twisted Pair Cable which consists of two conductors usually copper, each with its own color plastic insulator. Identification is the reason behind colored plastic insulation.

UTP cables consist of 2 or 4 pairs of twisted cable. Cable with 2 pairs use RJ-11 connector and 4 pair cable use RJ-45 connector.

Advantages Of Unshielded Twisted Pair:

• It is cheap.
• Installation of the unshielded twisted pair is easy.
• It can be used for high-speed LAN.

Disadvantage:

• This cable can only be used for shorter distances because of attenuation.

 the basic twisted-pair cable consists of two standard of copper wires to stick together this to string reduce the sensitive of the cable to EMI and also reduce the tendency of the cable to radiate radio frequency noise that interfaces with near Bhari cable and electronic component this is because of the radiant signal from the twisted wire tense and to   Cancel  Each Other out

 twisting also controls the tendency of the wire in the pair to EMI in each other when you're two wires are in close proximity the signals in which wire tend to reduce noise called crosstalk in the other twisted the wires in the paired radius.

b.  shielded twisted pair cable:

 twisted pair cabling consists of one or more twisted pair of cables enclosure in a file wrap and when copper shielding early the designer used shielded twisted pair cable because the shield for the reduce the tendency of the cable to radiate EMI and does radius the cable sensitivity to outside interface

 consider cable and STP cables are used shielded for the same purpose the shelter is connected to the ground electronic device to which cable has connected a ground  that serves as an electronic reference. and usually, it literally is connected to a metastatic driven into the ground properly ground it sheltered prevent signals from getting into or out of the cable.

 the cognizable cable is reasonably easy to install because the cable is robust and difficult to damage in addition connectors can be installed within and bit of practice the device to device cabling approach can be difficult to reconfigure however when new device cannot be installed near an existing cabling path.

Advantages of Shielded Twisted Pair Cable

• Easy to install
• Performance is adequate
• Can be used for Analog or Digital transmission
• Increases the signaling rate
• Higher capacity than unshielded twisted pair
• Eliminates crosstalk

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Disadvantages of Shielded Twisted Pair Cable

• Difficult to manufacture
• Heavy

  coaxial cables :

 commonly now as Cox Carriers a signal higher frequency than a twisted-pair instant of having two wires there is primary core wire in the center with an insulator and an outer conductor that service as a Sheldon, an insulator cable TV uses cognizable cable lens telephones, Hasan in a conductor surrounded by cricket match both conductor share common Centre axial hence the terms coaxial

Advantages Of Coaxial cable:

• The data can be transmitted at high speed.
• It has better shielding as compared to twisted pair cable.
• It provides a higher bandwidth.

Disadvantages Of Coaxial cable:

• It is more expensive as compared to twisted pair cable.
• If any fault that occurs in the cable causes the failure in the entire network.

 fiber optics cable :

 hot wheels there are many different kinds of fiber wise as well as many different ways of sending data thought them the whole concept is that light tends to bend or reflect when you eating something of different density for example light tends to reflect when hitting a pool of water the same light of hitting the pool at a different angle might make the water appear in the mirror.