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HOW NETWORKS SUPPORT HCI PRESENTED BY JOYCE NGANGA EDWINA ODIWANOR MOHAMMED LAMINE KONATE
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How Networks Support HCI WHAT IS NETWORK? BRIEF HISTORY OF NETWORKS WHY WE NEED NETWORKING WHO REQUIRES NETWORKS
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Types of Networking Local Area Network A local area network (LAN) is a network that is confined to a relatively small area. Such as school or building. Wide Area Network A wide area networks (WANs) connect larger geographical areas, such as London, Africa, or the world.
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Network Topology What is a Topology? The physical topology of a network refers to the configuration of cables, computers, and other peripherals. The logical topology is the method used to pass information between workstations.
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Network operating system What is a network operating system? Unlike operating systems, such as DOS and WINDOWS that are designed for single users to control one computer, the network operating systems ( NOS) coordinate the activities of multiple computers across a network. It acts as a director to keep the network running smoothly.
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Types of NOS Client/server Client/server network operating systems allow the network to centralize functions and applications in one or more dedicated file servers. Peer –to-Peer Peer-to-peer network operating systems allow users to share resources and files located on their computers and to access shared resources found on other computers.
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Client/server network
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Peer-to-Peer network
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Network security Firewall A firewall is special software or hardware designed to protect a private computer network from unauthorised access. User name and password You usually have to enter a user name and password when you want to access information on a network.
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Firewall and Password
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Impact of Networks on HCI Advantages High performance interaction Allows communication Accessibility of resources Increases computing power Faster accessibility of information Global connectivity
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Disadvantages Expensive Encourages pirating (Breaching copyright regulations) Encourages exchange of illicit information or materials Lack of security Computer usage is monitored Affects multi-user access Uncontrollable access Inefficient feedback and response
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HCI Activities Supported By Networks Educational Domestic Business Social and Welfare Leisure Health and safety
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References www.google.com/networks/images www.google.com/networks/images A. Dix,J. Finlay, G.D.Abowd, R.Beale;Human- Computer Interaction;3 rd Edition,Prentice Hall Printers Readers Digest Edition :Teach Yourself Computers and the Internet, IDG Books Worldwide, Inc. Shoniregun, C. A.(2004), Questioning the boundary issues of internet security Burns Tom & Sinfield Sandra,(2003),Essential Study Skills
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