INFO 2 - 4. Transfer of Data in ICT Systems 0.0 / 5 ? ICTNetworksA2/A-levelAQA Created by: AndrewCreated on: 19-01-17 18:36 Differences between LAN and WAN LAN -> small area, inside institutions / WAN -> large areas, global networks (internet) 1 of 17 Real life example of LAN School network 2 of 17 Real life example of WAN School network on a split site 3 of 17 Real life example of distributed network Bank network including teller computers and ATMs 4 of 17 Why are networks used? Allows sharing of resources 5 of 17 Disadvantages of p2p networks in large organisations Cost a lot / workstations have to store all data on that machine 6 of 17 Describe communications devices Allows communication between devices - e.g. router 7 of 17 Describe networking software Enables operation and management of network e.g. a browser 8 of 17 Describe data transfer media Most common media used for transmission of data are cables e.g. ethernet 9 of 17 Explain the internet A worldwide network of interconnected computers that send and receive information 10 of 17 Explain the world wide web A way of accessing information stored on websites. Web browser software is used to access files through the use of HTTP. 11 of 17 Describe what an Intranet is and why it's useful Collection of web pages only accessible to employees of a particular company. Allow for better communication between colleagues. 12 of 17 Describe what an extranet is and an example of it's use Part of an intranet accessible to people outside the company e.g. customers accessing details of previous orders 13 of 17 Pros and cons of client/server networks + easier to maintain and backup as it's done centrally / - require a dedicated server so can be expensive and complicated 14 of 17 What is TCP/IP used for? Controlling the transmission of data 15 of 17 Difference between de jure & de facto de jure are formally introduced by committee and are legally binding e.g. TCP/IP - De facto is opposite e.g. PDF 16 of 17 Benefit of de jure & de facto de jure - minimisation compatibility issues / de facto - popular with users already 17 of 17
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