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computer cable

introduction to networking cables :
Image result for straight cable
  • Cabling :-
transmission media make use of wires or cable in which signal are imprisoned to a specified path . there are different type of guided media, such as :
  • Twisted pair cable
this is most commonly used cable and is cheaper when compare to other cable . they are easy  to install ,lightweight and support several network  types. twisted pair cable are used to to transfer both analog and digital signals. it is mostly used in telephone network as well as within a building . these cable are less expensive when compared with other midia. twisted pair cable are further classified in two types , unshileded twisted pair cable and shielded twisted pair cable .
unshielded twisted pair cable consist of two conductors. these conducter are made from copper and are conveted  with a palstic insulater to differentiet them from several other cable .
shielded twisted pair cable consist of a metal foil used to cover the insulated conductors . the  main purpose of shields is to prevent noise penetraition and also remove crosstalk.  
  • Coaxial cable
this cable are consist of two conductors that are parallel t each other and are separated by an insulator. in the center ,copper ,which is a solid wire ,is used .the inner conductor is placed either by using insulating rings or a think dielectric material, whereas the outer one is covered with a jacket or shield .
coaxial cable have frequency and data rates when compared to twisted pair. they support many varieties of data and traffic type passed over by a number of devices. coaxial cable are classified  into two types:
Base-band--> it is used for digital transmission.this type  is commonly  used in LAN to transmit a signal with high speed.
Broadband--> it is used for analog transmission . foe ex- , television cabling , it make use of different frequency to transmit various signal simultaneously.  
coaxial cable mostly used in :
  1. local area network (LAN)
  2. Television transmission
  3. Telephone  transmission 
  4. computer system links for short-run 
  • straight cable 
Straight-Through refers to cables that have the pin assignments on each end of the cable. In other words Pin 1 connector A goes to Pin 1 on connector B, Pin 2 to Pin 2 ect. Straight-Through wired cables are most commonly used to connect a host to client. When we talk about cat5e patch cables, the Straight-Through wired cat5e patch cable is used to connect computers, printers and other network client devices to the router switch or hub (the host device in this instance).
  • Fiber optics
this media consist of three component: transmission media ,detector and light source . the 1 and 0 represent   presence and absence of light. the transmission medium is a thin glass fiber that generates light according to the input(electrical signal). the detector regenerates the signal after the light signal is found in the transmission medium. this transmission is done by attaching a light source to the end of an optical fiber and a detector.  
optical fiber is used for both analog and digital signal. this cable provide high-quality transmission of data at very high speed and protect signals from interference and noise . thus it is know as to have less distortion.

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