Saturday, October 5, 2019

Coaxial Cable / Internet and Networking

Coaxial Cable :-
               Coaxial,  or coax,  cable looks like the cable used to bring the cable TV signal to your television.  One strand (a solid - core copper wire)  runs down the middle of the cable.  Around that strand is a layer of insulation,  and covering that insulation is braided wire and metal foil,  which shields against electro-magnetic interference.  A final layer of insulation covers the braided wire.  Because of the layers of insulation,  coaxial cable more resistant to outside interference than other cabling,  such as u shielded twisted - pair (UTP)  cable.  A coaxial cable with copper core and the layers of insulation.  There are two types of coax cabling : thinnet and thicker.  The two differ in thickness and maximum cable distance that the signal can travel.  Let's take a look at thinnet and thicknet:
Thinnet :- This refers to RG-58 cabling,  which is a flexible coaxial cable about half inch thick.  Thinnet is used for short-distance communication and is flexible enough to facilitate routing between workstations.  Thinnet connects directly to a workstation's network adapter card using a British navel connector (BNC)  and uses the network adapter card's internal transceiver.  The maximum length of thinnet is 185 meters.  Thinnet coaxial and the BNC connector on the end. 
Thicknet :- This coaxial cable,  also known as RG-8 , gets its name by being a thicker cable than Thinnet.  Thicknet cable is about half inch thick and can support data transfer over longer distances than thinnet.  Thicknet has a maximum cable length of 500 meters and usually is used as a backbone to connect several smaller thinnet - based networks.  Due to the thickness of half inch, this cable is harder to work with than thinnet cable.  A transceiver often is connected directly to the Thicknet cable using a connector known as a vampire tap.  Connection from the transceiver to the network adapter card isade using a drop cable to connect to the adapter unit interface (AUI)  part connector . Table 1-1 summarizes the characteristics of Thicknet and thinnet. 

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