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Showing posts from March, 2021

TOPOLOGIES OF COMMUNICATING MACHINES

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TYPES OF NETWORK TOPOLOGY NETWORK TOPOLOGY IS THE SCHEMATIC DESCRIPTION OF NETWORK ARRANGEMENT, CONNECTING VARIOUS NODES (SENDER AND RECEIVER) THROUGH LINES OF CONNECTION.   BUS TOPOLOGY BUS TOPOLOGY IS A NETWORK TYPE IN WHICH EVERY COMPUTER AND NETWORK DEVICE IS CONNECTED TO A SINGLE CABLE.   WHEN IT HAS EXACTLY TWO END POINTS, THEN IT IS CALLED LINEAR BUS TOPOLOGY.   FEATURE OF BUS TOPOLOGY 1.        IT TRANSMITS DATA ONLY IN ONE DIRECTION 2.        EVERY DEVICE IS CONNECTED TO A SINGLE CABLE.   ADVANTAGES OF BUS TOPOLOGY 1.        IT IS COST EFFECTIVE CABLE REQUIRED IS LEAST COMPARED TO OTHER NETWORK TOPOLOGY. 2.        USED IN SMALL NETWORKS 3.        IT IS EASY TO UNDERSTAND 4.        EASY TO EXPAND JOINING TWO CABLES TOGETHER.   DISADVANTAGES OF BUS TOPOLOGY 1.        CABLE FAILS THEN WHOLE NETWORK FAILS. 2.        IF A NETWORK TRAFFIC IS HEAVY OR NODES ARE MORE THE PERFORMANCE OF THE NETWORK DECREASES. 3.        CABLE HAS LIMITED LENGTH

MONITORS IN SUMMARY

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  MONITORS MONITOR IS A PRIMARY OUTPUT DEVICE.   IT DISPLAYS ALL CURRENT PROCESS APPLICATION AND DATA I.E. RUNNING INSIDE A COMPUTER SYSTEM.   A STANDARD MONITOR USES AN ANALOG , VGA INTERFACE WHICH PLUGS INTO TP15 PIN VGA CONNECTOR TO THE MOTHERBOARD.     THERE ARE TWO TYPES OF MONITOR TECHNOLOGY AVAILABLE TO THE MARKET. HERE ARE THOSE   CATHODE RAY TUBE (CRT) THIS MONITOR IS FADING IN POPULARITY BUT STILL IN WIDESPREAD USE WITH OLDER COMPUTER SYSTEMS. IT IS ANALOG STANDARD MONITOR. A CRT USES A PICTURE TUBE THAT WAS USED IN OLDER TUBE BASED TV SETS.   THE NARROW END OF PICTURE TUBE CONTAINS AN ELECTRON GUN.   IT EMITS 3 ELECTRON BEAMS.   ONE EACH FOR RED, GREEEN, BLUE LIGHT.   THE FRONT END OF THE PICTURE TUBE IS COATED WITH PHOSPHOROUS.     WHEN THE ELECTRON HITS PHOSPHOROUS COATING IT STARTS TO GLOW.   JUST BEFORE THE PHOSPHOROUS COATING A METAL PLATE CALLED SHADOW MASK IS USED TO DIVIDE THE IMAGE CREATED BY THE ELECTRON GUN INTO RED, GREEN AND BLUE PIXELS ON