IT Revision

IT Revision

1. Communication Protocols

   • VOIP
     • Voice Over Internet Protocol
     • Allows people to speak to each other using voices over the internet
     • E.g. Skype
   • HTTP
     • Hypertext Transfer Protocol
     • Transfers web pages from the server to the client
     • HTTPS means the data is secure through encryption
   • POP 3
     • Protocol for emails etc.
     • Sends data just from server to client so if more than one device is owned actions completed on one won't show on the other
   • IMAP
     • Also a protocol used for email communications but sends data back and forth between server and client so if more than one device is owned actions will be registered on both

2. ISPs

   • Wi-Fi
     • Uses a router to connect many devices to the internet
     • ADVANTAGES
       • Costs less than ethernet as one router is less expensive
       • More mobile, only need to be in range to access it
       • Can connect many devices to one router
     • DISADVANTAGES
       • Lower bandwidth and higher latency
       • Can be interfered by nearby device and walls etc.
       • Can be accessed/hacked with more ease as only need to be in range to gain access
   • Ethernet
     • Uses a wire to connect a device to internet
     • ADVANTAGES
       • Higher bandwidth and lower latency than wi-fi as it uses direct wires
       • Less interference as uses wires
       • Not as easy to access/hack
     • DISADVANATAGES
       • Costs a lot as wires are expensive
       • Less mobile, need to be close to wire to access it
       • Can only connect one device per wire

3. Legislation

   • Copyright, design and patents act
     • 1988
     • Prevents you from using resources made by a person without their permission
     • Also prevents copying resources and giving them to friends, selling them etc.
   • Computer misuse act
     • 1990
     • This prevents the intentional misuse of someone's computer
     • This includes hacking, viruses, grooming etc.
       • People can be sentenced for a number of years depending on the severity of what they've done relating to computer misuse
   • Data protection act
     • 1998
     • This prevents taking advantage of the access of someone's data e.g. in schools etc.
     • This is even sharing people's name, age etc.