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OSI model - Layer 1 Review (by Tony Fortunato)

I was teaching on onsite and the customer wanted to record the session so employees can have some material to review. I thought it would be helpful to share.

I always start with the OSI model - or my version of it.  

I hate to complicate things, so I use a 4 layer model. As I go through it, I always get that asked, 'why bother with this?'.

I explain that the model helps people to work consistantly. Kind of like a checklist when troubleshooting, baselining or even a way to organize your report.



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