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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