Computing Revision For Networks And Software

Computing Revision For Networks And Software

1. Software

   • Operating System
     • What does it do?
       • Booting
         • Booting is a process of starting the computer operating system it starts the computer to so it can work
       • Memory Management
         • This is also an important function of the operating system because the memory cannot be managed without the operating system
       • Loading and Executing
         • A program is loaded into the computer before being executed, operating system provides the facility to load programs in memory easily and then executes it
   • Utility Software
     • Anti - Viruses
     • Firewall
     • Automatic Updates
     • Disk Defragmenter
   • Custom Written vs Off The Shelf
   • Open Source vs Proprietary

2. Network

   • Types of Network
     • Bus
       • Disadvantages
         • If the main cable fails all nodes fail
         • Only one data package can go through the cables at once
       • Advantages
         • You can add and take away nodes away from the main cable
         • Least expensive out of the 3 Networks
     • Star
       • Advantages
         • Easy to install
         • Easy to detect faults
       • Disadvantages
     • Ring
       • Advantages
         • It is the most fastest of the 3 Networks
         • All computers are linked together
       • Disadvantage
         • Each data package has to pass through each node to get to the right one making it slower