I just started with a small company as a network admin. We have our WAN connection coming in to a Cisco 1721 router, which is connected to a sonicwall firewall, which is connected to a Cisco 3500 switch. All cable used is cat5 10/100. We have a couple wireless routers connected to dish out wirless access. We also have a couple small switches laying around the network.
For some reason, the network seems rediculously slow. I just transfered a 65MB file from one pc to another and it took almost 2 minutes! That just doesn't seem right. I've noticed the slowness a lot lately.
My question is, what I can do to troubleshoot this problem?