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All of your articles are useful and full of information. I look forward to each one. One thing I would like to see more information about, which I don't often see, is the Cisco product line. For example, should I use a 2800 series router when a 1700 series router will do?
When is necessary to move up a class of routers? Say from a 1800 series to a 2800 series? Or when would replacing a router with a layer 3 switch be appopriate? I guess these are more design issues, but I don't often see much in the way information about these topics.