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This Concept Map, created with IHMC CmapTools, has information related to: Chapter 3 Network, Networks Unswitched (Does not use routers) Usually covers a building LAN (Local Area Network), Reasons for Networks are also concerned with protection from unauthorized use, loss or compromise of data and with external threats to the ability to transfer messages or the integrity of messages. Security, Reasons for refers to the ability of a network to grow in size without substantial loss of performance Scalability, Networks Resource Sharing High Reliability Save Money Improve Corporate Communication Reasons for, Networks Unswitched Covers a City MAN (Metropolitan Area Network), Networks Switched (Uses routers) May cover a county, state, country or the whole world WAN (Wide Area Network), Reasons for ability to continue to transfer messages in the event of failures on the network. Error tolerant and error free communications are key reliability concerns. Reliability