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Unformatted text preview: Topic #8 – Basic Network Design Objectives • Determine factors that affect network design • Implement guidelines for installing cable • Use structured wiring and networking in your network designs • Design a network for a home • Design a network for an office or organization Factors that Affect a Network Design • Planning should precede equipment purchase • Nine factors to consider – Purpose of the network – Anticipated network traffic – Redundancy requirements – User movement – Future growth – Security considerations – WAN connectivity – LAN and WAN costs – Existing network topology and resources Purpose of the Network • SLA = Service Level Agreement\ • Number one task: match network with user needs • Scenario: bandwidth demand varies with office – Architects produce drawings saved to large files • File transmission likely to require high bandwidth – Copywriters generate files with high text content • Likelihood that files are smaller than architects' • Likelihood that bandwidth need is also less • General considerations – What type of information is to be shared? – What software applications are used? – What resources are required to run applications? • General considerations (continued) – What components are to be shared? • Examples: printers, CD arrays, storage, and others Computer Networks & Distributed – What are the organizational business patterns? – How are patterns associated with network use? – What role does the network play in the business? – What roles does network play in operational strategy? – What types of computers are to be connected? – What is the function of the computers on the network? – What kinds of LANs and WANs are to interconnect? Anticipated Network Traffic • Two primary factors to consider for a new network – Number of users – Types of servers and hosts that will run on network • Scenario 1: home network without a server – Low network traffic largely consisting of file sharing • Scenario 2: home network for entertainment – Traffic heavier due to use of streaming video • Scenario 3: office with one server – Traffic heavier into and out of server (bottleneck) • Scenario 4: office with multiple servers – Traffic to any one server is light (if tasks distributed) • Actions to take when upgrading a network – Obtain benchmarks of current network use – Consider traffic from specific devices • Benchmark: performance assessment • Some benchmarks that can be collected – Slow, average, peak activity in relation to work patterns – Slow, average, peak activity at different network points – Typical network activity related to certain applications • Example: benchmark tracking database server activity – Determines slow, average, peak access times Anticipated Network Traffic • In relation to network paths – Provide extra cable and equipment – Enable system to tolerate failure of one or more devices...
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- Spring '10
- Computer network, Home Network, Wireless network, Wireless access point