Computing Revision

Computing Revision

1. Software

   • Operating systems
     • Provides security (Firewall)
   • Utility Software
     • Antivirus
     • Firewall
     • Disk defragmenter
       • Brings fragmented files together.
     • Automatic Updates
   • Custom written vs off the shelf
     • Custom written
       • Advantages
         • Lasts for a long time.
         • Don't have to wait for updates.
         • Personal to your needs.
       • Disadvantages
         • You have to wait for it to be made.
         • More money.
         • No support.
     • Off the shelf
       • Advantages
         • Don't have to wait for it to be made.
         • Reviews to look at.
         • Less money.
         • More reliable.
       • Disadvantages
         • It could do many things you don't want it to do.
         • Might not be good quality.
         • Reviews may not be reliable.
   • Open source vs propietary
     • Open source
       • Advantages
         • It is easier to use.
       • Disadvantages
         • You can edit it.
         • You can't copy the software.
     • Propietary
       • Advantages
         • You can edit the software, the way you like it.
         • You can copy the software.
       • Disadvantages
         • It may be hard to use and complicated.

2. Networking

   • Network Basics
   • Client server vs peer to peer
     • Client Server
       • A client server connects to all the computers which means you can log on from anywhere.
     • Peer to peer
       • A peer to peer can only connect to computers that are connected together.
   • Network Topologies
     • Star network
       • Each pc has it's own cable that connects to a switch/hub.
       • Lots of cable needed.
     • Bus network
       • All computers are joined to one cable.
       • If main bus fails, the whole network fails.
     • Ring Network
       • Data travels through all the computers until it reaches it's destination.
       • Cheap.
   • Network security measures (FEPPU)
     • Password
     • User access levels
     • Physical Security
     • Firewalls
     • Encryption
   • Network policies (DAFAB)
     • Disaster Recovery
     • Failover
     • Backups
     • Archiving
     • Acceptable use policy
   • IP Addresses
     • Unique set of numbers that identifies each computer using the internet.
     • Internet Protocol