SEATTLE--(BUSINESS WIRE)--For the first quarter of fiscal 2015, F5 Networks, Inc. (NASDAQ: FFIV) announced revenue of $462.8 million, down slightly from $465.3 million in the prior quarter and up 14 percent from $406.5 million in the first quarter of fiscal 2014. GAAP net income was $89.1 million ($1.21 per diluted share), compared to $94.0 million ($1.26 per diluted share) in the prior quarter and $68.0 million ($0.87 per diluted share) in the first quarter a year ago. Excluding the impact of