Hi there, I have one question if someone can help me please, i found one of my switch which shows me model SW-6750X-48P, is that something fake or Geninue, Original Model is WS-C3750X-48PF-S, for more information I am leaving show version for switch ...

Can any one tell me whats the difference between ISR4431/k9 and ISR4431-V/K9?