I’ve been playing with Cisco switches and routers recently at home to get a handle on VLANs-more about VLANs later. Some people I know who have gotten involved in DataPower started out in system administration or networking and worked their way up the technology stack to SOA Appliances (WebSphere DataPower). Myself and others started at the Middleware layer (or development layer, JEE/Java programming) and worked our way down just a little). So, I’m catching up on the implementation details of Layer 1 and Layer 2 of the OSI model. It has been about fifteen years since I had to remember the seven layers of the OSI Networking Model for school. So, I had to go looking for a good reference.