both the technology and the politics of it
And the economics. The economics, man!
I wouldn't say I know nothing about networking, but I sure am not ready to design a WAN for my increasingly crazy-arse company. In case I dont't burn out soon or leave, I guess I will be asked to come up with something, probably between breakfast and lunch due to all the other "priority 1" projects that occupy my time.
What book will bring me up to speed?