Unlike a how-to document, this paper primarily focuses on the enterprise LAN/WAN network design topics by answering what and why. Therefore, no specific implementation solutions are given. It is recommended that one reads a complementary how-to paper with detailed router configurations. This paper focuses on enterprise IP LAN/WAN design only. That means if the client is an ISP or any sort of service provider, some of the design philosophies presented here may differ. Also, this paper talks only about the IP network design, so the user needs to consult additional materials for the LAN/WAN design of IPX, AppleTalk, or any other networks running non-IP protocols.
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