F OLLOWING THE STANDARDIZATION OF THE I NTERNET AND ITS PROTOCOLS IN THE 1990 S

F ollowing the standardization of the i nternet and

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F OLLOWING THE STANDARDIZATION OF THE I NTERNET AND ITS PROTOCOLS IN THE 1990 S , AROUND 1995, THE COMPANY 41 J OURNAL OF C OMPUTER S CIENCES AND A PPLICATIONS S ALES F ORCE BEGAN HOSTING AND DISTRIBUTING CUSTOMER RELATIONSHIP MANAGEMENT SOFTWARE OVER THE INTERNET ON A SUBSCRIPTION BASIS . T HE COMPANY HOSTED A PLATFORM ON THEIR SERVERS THAT ENABLED APPLICATION DEVELOPERS TO BUILD APPLICATIONS THAT COULD BE HOSTED ON THESE SERVERS . T HIS WAS ONE OF THE PIONEER INSTANCES OF HARDWARE VIRTUALIZATION , WHICH LOOSELY MEANS , HOSTING A COMPUTER INSIDE ANOTHER COMPUTER ”, AND CLOUD COMPUTING . F IGURE 1. V IRTUALIZATION AND C LOUD C OMPUTING R UTH FIELD , S. (1995, S EPTEMBER ). B . W HAT IS V IRTUALIZATION , R EALLY ? V IRTUALIZATION IS A SURPRISINGLY SIMPLE CONCEPT AT LEAST IN THEORY . T HE SIMPLE EXPLANATION IS THAT YOU CREATE A VIRTUAL VERSION OF SOMETHING THAT S GENERALLY USED FOR SOME TYPE OF EXECUTION . F OR EXAMPLE , IF YOU WERE TO PARTITION A BASIC HARD DRIVE TO CREATE TWO HARD DRIVES , THEN THEY WOULD BE TWO VIRTUALIZED HARD DRIVES , AS THE HARDWARE IS TECHNICALLY A SINGLE HARD DRIVE THAT WAS DIGITALLY SEPARATED INTO TWO . C . T HE 7 T YPES OF V IRTUALIZATION T HERE ARE 7 PRIMARY TYPES OF VIRTUALIZATION , AND EACH ONE DIFFERS ACCORDING TO THE ELEMENT IT IS USED ON . E ACH TYPE CAN ALSO HAVE A DIFFERENT EFFECT ON NETWORK SECURITY . 1. OS V IRTUALIZATION AKA V IRTUAL M ACHINES V IRTUALIZING AN OPERATING SYSTEM ENVIRONMENT IS THE MOST COMMON FORM OF VIRTUALIZATION . I T INVOLVES PUTTING A SECOND INSTANCE OR MULTIPLE INSTANCES OF AN OPERATING SYSTEM , LIKE W INDOWS , ON A SINGLE MACHINE . T HIS EMPOWERS BUSINESSES TO REDUCE THE AMOUNT OF PHYSICAL HARDWARE REQUIRED TO RUN THEIR SOFTWARE BY CUTTING DOWN THE NUMBER OF ACTUAL MACHINES . I T SAVES COMPANIES CASH ON ENERGY , CABLING , HARDWARE , RACK SPACE , AND MORE , WHILE STILL ALLOWING THEM TO RUN THE SAME QUANTITY OF APPLICATIONS . 2. A PPLICATION -S ERVER V IRTUALIZATION A PPLICATION - SERVER VIRTUALIZATION IS ANOTHER LARGE PRESENCE IN THE VIRTUALIZATION SPACE , AND HAS BEEN AROUND SINCE THE INCEPTION OF
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IUGC Operating System, Volume 1.1, 14th December 2019. Submitted to: Dr.Noman Islam THE CONCEPT . I T IS OFTEN REFERRED TO AS ADVANCED LOAD BALANCING ,’ AS IT SPREADS APPLICATIONS ACROSS SERVERS , AND SERVERS ACROSS APPLICATIONS . T HIS ENABLES IT DEPARTMENTS TO BALANCE THE WORKLOAD OF SPECIFIC SOFTWARE IN AN AGILE WAY THAT DOESN T OVERLOAD A SPECIFIC SERVER OR UNDERLOAD A SPECIFIC APPLICATION IN THE EVENT OF A LARGE PROJECT OR CHANGE . I N ADDITION TO LOAD BALANCING IT ALSO ALLOWS FOR EASIER MANAGEMENT OF SERVERS AND APPLICATIONS , SINCE YOU CAN MANAGE THEM AS A SINGLE INSTANCE . A DDITIONALLY , IT GIVES WAY TO GREATER NETWORK SECURITY , AS ONLY ONE SERVER IS VISIBLE TO THE PUBLIC WHILE THE REST ARE HIDDEN BEHIND A REVERSE PROXY NETWORK SECURITY APPLIANCE .
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