Revision

Revision

1. Software

   • Operating systems
     • The functions of a OS
       • Provide a UI
       • Provide security
       • Peripheral managment
       • Memory and file management
       • Multitasking
   • Custom written vs off the shelf
     • Custom written
       • Better qaulity
       • made to suit your needs
       • It support comes with it
       • Don't have to wait for updates
       • Expensive
       • Takes time for it to be wirtten
       • More bugs.
     • Off the shelf
       • Cheaper
       • Reviews are available
         • Reveiws may not be reliable
       • More reliable
       • No need to wait, its ready from the start.
         • You have to wait for updates
       • Could have too many functions
   • Open source Vs Proprietary
     • Open source
       • Source code is available to anyone
         • You have to share any edits you made
       • Mostly free
     • Proprietary
       • Source code isnt available
       • Probably isnt free
       • Might be better qaulity as idt is made by a big company
   • Utility software
     • Anti-virus
       • Antivirus checks existing and downloading files against a database of files. if it finds one it qaurentines it and then asks the user if they want to remove it.
     • Disk defragmenter
     • Firewall
       • A firewall blocks the flow of data. It can stop data packets leaving the network so unauthorized users cannot get the data leaving the network. It may also stop people accessing websites.
     • Automatic updates
       • Well, it automatically updates stuff

2. Networking

   • Networking basics
     • Standalone pc
       • Advantages
         • All files on one place
         • All the nodes and peripherals are yours!
       • Disadvantages
         • Cant play games with other peopole
         • can't share files with other people unless you have a usb
     • Networked PC
       • Advantages
         • Share files
         • Share internet connection
         • Share peripherals such as printers
         • Play games together!
       • Disadvantages
         • Share internet connectoin
         • share files.
   • Client server Vs peer to peer
   • Network topologies
     • Star
       • A star network has a central hub or switch that is connected to all the other data nodes by seperate wires like a star. it could also have a router that has a built in firewall.
         • It is the most expensive
         • It's the fastest network and as they are all connected by seperate wire if one node breaks no othersd are effected
     • Ring
       • A ring network has all the nodes connected to each other, like a ring,
     • Bus
   • Network security measures
   • Network Policies
   • IP Addresses