Hello,
I have got two mikrotik routers one is RB1100 and the other one is RB450. I need to connect both the switches, which cable will i require 'Crossover' or 'Straight'.

Thanks

Ports on the routerboards are auto-sensing, so the answer you your question is "yes".

Thanks for your reply, but is that 'Yes' for 'Crossover Cable' or 'Straight Through' ???

Yes, either cable will work. Though it's usually a good idea to have one of each with you at all times.