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Data Communication S and Networking Sixth Edition Case Project 7-1

In: Business and Management

Submitted By bogart1620
Words 369
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I calculated the mileage between the offices and here are the results: Baton Rouge, LA - Seattle, WA (2600mi); Baton Rouge, LA - Phoenix, AZ (1400mi); Baton Rouge, LA - Boston, MA (1500mi).

I will start with WAN topology: In this case I will choose the tiered topology WAN, where the sites connected in star or ring formations are interconnected at different levels, with the interconnection points being organized into layers to form hierarchical groupings. Variations on this topology abound. Indeed, flexibility makes the tiered approach quite practical. A network architect can determine the best placement of top-level routers based on traffic patterns or critical data paths. In addition, tiered systems allow for easy expansion and inclusion of redundant links to support growth. On the other hand, their enormous flexibility means that creation of tiered WANs requires careful consideration of geography, usage patterns, and growth potential.

As a Wan transmission I would choose the T-Carrier. T-carrier standards specify a method of signaling, which means they belong to the Physical layer of the OSI model. A T-carrier uses TDM (time division multiplexing) over two wire pairs (one for transmitting and one for receiving) to divide a single channel into multiple channels. Each channel may carry data, voice, or video signals. The medium used for T-carrier signaling can be ordinary copper wire, fiber-optic cable, or wireless links. So in this case I am going to use both - T1 and T3 transmissions to connect the central office with regional offices.

To connect the 150 home offices with the regional offices I am would use the DSL (digital subscriber line) Connection. DSL is a WAN connection and it operates over the PSTN and competes directly with ISDN and T1 services, as well as broadband cable services. However I would choose the symmetric technology of a DSL connection, because the need to provide a fast and reliable connection between workers home offices and regional offices to exchange e-mail and large files. Symmetrical technology provides equal capacity for data traveling both upstream and downstream. Symmetrical transmission is suited to users who both upload and download significant amounts of data. So in our case I would use HDSL, SDSL, or SHDSL.…...

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