GCSE A* REVISION NOTES


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Computer communcations and networking

Networks

explain the advantages of networking stand-alone computers into a local area network

describe the hardware needed to connect stand-alone computers into a local area network, including hub/switches, wireless access points

explain the different roles of computers in a client-server and a peer-to-peer network

describe, using diagrams or otherwise, the ring, bus and star network topologies

describe the differences between a local area network and a wide area network such as the internet

explain the terms IP addressing, MAC addressing, packet and protocols

explain the need for security measures in networks, such as user access levels, suitable passwords and encryption techniques

describe and justify network policies such as acceptable use, disaster recovery, failover, back up, archiving

Internet

describe the nature of the internet as a worldwide collection of computer networks

describe the hardware needed to connect to the internet including modems, routers

explain the need for IP addressing of resources on the internet and how this can be facilitated by the role of DNS services

explain the importance of HTML and its derivatives as a standard for the creation of web pages

describe common file standards associated with the internet such as JPG, GIF, PDF, MP3, MPEG

explain the importance of compressing files that are transmitted via the internet

describe the differences between lossy and lossless compression


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