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Network implementation consists of the following steps:
1. Physical network design
Local Area Network design
LAN design consists of selecting appropriate devices such as Hubs, Bridges, Switches, and Routers. Criteria for selecting LAN devices include the following:
The number of ports required at different levels
The speed (10Mbps/100Mbps/1Gbps or others)
Media considerations, such as Ethernet, Token Ring etc.
Support for different network protocols such as TCP, VOIP etc.
Ease of configuration, and maintainability
Management (SNMP etc.)
Availability
Documentation
Wide Area Network design
Various WAN technologies are available for connecting enterprise resources. A few prominent technologies are given below:
Leased lines
Synchronous Optical Network (SONET)
Frame Relay
Asynchronous Transfer Mode (ATM)
The technology that suit an enterprise requirement depends on the bandwidth and QoS requirements, security requirements, and application requirements.
2. Remote Access requirements: The companies are increasing becoming mobile. This demands remote access capability to its executives, customers and vendors. Devices are chosen taking into consideration the remote access requirements of the Company. Several technologies can be used for remote access including PPP, Multilink PPP, ISDN, or Cable Modem. Careful consideration to be given whether the software or WAN devices support authentication and authorization methods intended to be adopted by the Company.
3. Testing, and Documentation: Appropriate test methods be developed for thoroughly testing a campus or enterprise network. The test methods must include connectivity, accessibility, availability, and load testing. Documentation is to done with the help of network diagrams. Both logical and physical networks must be documented properly. Don't forget to take a network baselining for future reference and troubleshooting.
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