Trunking question

Hi there,

I am a newbie so forgive my ignorance. I have come acroos 5 switches
(3550's) that are all daisy chained via their gig ports. I am going to
introduce 3 new vlans as there is only vlan 1. Would and could i trunk
the gig ports to allow the vlan traffic to traverse the switches to
the router or would i trunk fa ports?

Sorry if this is a dumb question, but hey i didn't say i was
bright :)

Thanks for any help.


Regards Andrew.