Networking
The difference between computer and telephone In networking perspective
Let us think about the previous standard telephone.All telephones are connected by overhead wires(carried above phone poles on the street facet) to the area telephone exchange. Formerly a guy utilized to give connections between two phones by manually linking the sockets of the two phones inside the exchange developing with a modest wire.”the phone exchange” is the leader of that team of phones. There must be at least a couple of hundred thousand this kind of little exchanges covering our complete Earth. All these exchanges are linked by unbreakable connections( by wires/cables/optical cables or wireless).In achieving this connectivity entire groups of exchanges ought to be related to a quite powerful central exchange serving 50 % a country . All this kind of central exchanges will yet again be linked to just a couple of dozen “back again bone” exchanges so that each one particular of the hundreds of hundreds of thousands of phones on earth can be connected to any other cellphone doing work in any faraway corner of the earth.
Now a days an unimaginably huge mesh of powerful and durable thick metal wire “coaxial” cables and far a lot more potent optical fibre cables covers entire earth. (optical fibres can present a hundred thousand two way channels via a solitary optical fibre cable).Some of these steel/optical fibre cables are laid for aspect of the route for hundreds of kilometres on ocean floors encased in really sturdy rubber and steel casing to final for at least fifty percent a century. But this is only 50 % the tale about telephones.
