I went and bought a networking+ book and the first thing it teaches you is the OSI model. Do people in the real world when working on router and switches benefit from knowing what's going on in layer 2, 3 and being able to solve problems.
C-135R Crew Chief
i7 2770 @ 3.4ghz, Geforce GTX 560 ti, 8GB DDR3 1600, SSD 120gb, cup holder
I would imagine if you could understand Morse Code, a tap dancer would drive you crazy