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WAN Requirements (Diagram is here) The Washington School District WAN connects all school and administrative offices to the District Office for data delivery purposes. Based on a two-layer hierarchal model, three regional hubs at Shaw Butte Elementary, Service Center, and the District Office will be in place. Each school will then connect to a hub according to proximity. In this case, Acacia will be connecting to the Service Center Hub. This WAN design should remain functional for a minimum of 7-10 years and provide for 2x growth in throughput potential. All installations will adhere to local building codes, code officials, and accepted engineering practices. Specifications Each school will filter all protocols traversing the WAN; with TCP/IP and Novell IPX being the only acceptable protocols. Internet access and other external connections will be provided through the District Office using a frame-relay WAN connection. This would include the three-router core of regional hubs. Routing between each school and its regional hub will be done using the PPP encapsulation. Authentication protocol will be CHAP, chosen for providing better security against playback attacks through the use of variable challenge values that are unique and unpredictable. PAP will not be implemented due to lack of encryption for passwords (Cleartext only), and the ability for users to attempt authentication at will (susceptible to "brute force" attacks). ISDN is only needed at the Community School in the Shaw-Butte regional hub due to location and size considerations. It will therefore not be implemented into the Acacia School The District Office will contain (enterprise) master DNS and and SMTP servers. Each regional hub will house Administrative, Library, Application, DNS and Web Servers. Interconnection of regional hubs will be established using four T-1 lines. Each school served at the regional hub level is connected to the WAN core via one T-1 connection. |
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