Revision Resource

Revision Resource

1. Wired and Wireless Networks

   • The Internet
     • Internet Protocol (IP)
       • A set of rules to make sure that the devices can work together on the internet
       • Every computer is assigned an IP address that is used to send and retrieve data from other devices
     • Packet Switching
       • he process by which data is transferred on the internet
       • data is split in to small 'packets' which are then sent out accross the network
     • Uniform Resource Locators (URL)
       • Protocol
         • First secton, set of rule that the browser should use to get to the resource from the server, HTTP is a common protocol.
       • Domain
         • Next section , the name of the server which is hosting the website
       • Path
         • Path follows domain , path is the name of the requested file on the server and specifies where it should be located on the server
   • Cloud
     • Streaming Services
     • File storing and sharing
     • Server hosting
     • Applications
     • Exist on the internet rather than secondary storage
     • Data centre
       • Abuilding which stores a large amount of data on secondary storage
     • Advantages
     • Disadvantages

2. Systems Software

   • Types of system software
     • Utility Software
       • Performs maintenance tasks to make sure the operation of the system continues
       • Defragmentation
       • Encryption
       • Backup
       • Compression
     • Operating Systems
       • Manage access to the hardware in the computer
       • Types of OS managers
         • file
         • device
         • user interface
         • user
         • memory
         • process
     • Device Drivers
       • Small programs which tell the OS how to use a piece of hardware