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Networking


Networking

 Computer networking
Key Data communications Terminology
Session: communication Dialog between network users or applications
Node: A network attached device.
Link: connect adjacent Nodes.
Path: end to end route within anetwork.
Curcuit: The Conduit over which data travels.
Protocol: Set of rules governing communication.
Transmission Media/Link/Channel
This is necessary to have pathway OR media to transmitted data from one point to other point. The term media mean the device that transmits voice or data from a point to other point.
What is Guided Media:
In guided media message flow through physical media like cables
Types of cables:
 (1)-what is  Coaxial cable?
Coaxial cable has copper core {inner conductor} with an outer cylindrical shell for insulation
(2)-  what is Twisted Pair Cables?
Twisted pair wire is most useable wire. Here two types of twisted pair cable are discussed like shielded and unshielded twisted pair cable.
Shielded twisted pair  short cut is STP. This is consists of pairsof insulated solid wire surrounded by a braided or corrugated shielded. Other types of twisted pair cable is unshielded twisted pair shortly we called UTP this is most frequently useable networking cable.
(3)- what is  Fiber Optic?
Fiber optic consists of thousands of very thin filament of glass fibers which can conduct light pulse generated by laser at transmission frequencies that approach the speed of light. Fiber optic has greater data transmission rate as well as the great security interference tapping.
What is Unguided Media or Radiated :--
In Radiated media message is broadcasting through air like microwave, infrared or satellite
Infra-red: now a days many systems using infra-red communications. This is commonly a directional infrared light signal transmitted into air and received nearby devices.
Radio and Microwave: these are the signals we think as being television, radio and satellite, but they are now being put to use in  Ethernet wireless and Bluetooth communications technologies.
Satellites: satellite contains a transponder consisting of  radio transmitter and receiver. Ground on one side of ocean sends signal to satellite which amplifies and transmits amplifies signal at different angle than it arrived at to another ground station on other side of ocean.

Dear student in the next article we will discuss what is digital signal, what is network network classification what is LANs WANs Network Topologies  RJ45 which devices are used in Networking and many other things which used in networking and most useable thing in computer networking in offices 


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