SWG and encryption

Hi Guys,

Please help me with below,

1. Why our SWG 8490 does not have Fiber Channel port?  How we can address this question if we  compare our SWG with iron port that has FC port? can give us the through put of the machine?

by the way: client has 7k internet active client/nodes​ grow 1.5k per year.

2. what is the best to offer encryption for full disk and file encryption on a work group environment. 100 nodes/client.

Thanks in advance.