Ethernet Cable Hookup

Hello, this may be quite a stupid question and all, but I need some help when referring to a good, thorough hookup with my etheret cable to my Mac. I've had this hookup for a few months since we got the Mac now and it's done okay ( also recently found out my internet is the worst my company gives out..so I'll be upgrading that soon) but, recently, the internet seems to stop working randomly and you have to close off the internet pages and wait a few minutes for it settle out or whatever. I was wondering, though, if there's an easier more direct route for my ethernet cable to hookup to my Mac. The hookup for the cable to Mac is as states: the company modem is on bottom (might upgrade for a better modem if company let's us buy our own) the ethernet cable then goes to hookup to my WiFi router (that main ethernet cable is blue), and then from the router a yellow cable (maybe ethernet, not sure) goes to hook up to my Mac. See, I just feel as if that is also slowing down the internet connection on the Mac because the main source of internet is going to the router before the Mac and the router is also sending off the internet to my iPod and Xbox. If anyone knows a better, more efficient hookup, please reply! Thank you.
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Your modem and router are capable of carrying much faster signals than you are getting from your carrier. 
I am assuming that you are a cable internet subscriber.  With cable internet, you are a tiered subscriber on a shared node architecture.  What this means is that the "speed" of your internet connection is limited by your hardware to the level for which you are subscribed.  You won't get any faster than your package, no matter what cable or arrangement of hardware you use.  Being a shared node achitecture, means that you are sharing bandwidth and central switching with a large number of other subscribers that share your node.  The more of these users that are online, the more that bandwidth is shared among those users, so even if you subscribe to the fastest service, during peak use times, you may not get anywhere near your rated speed.
I doubt that your connection of wall outlet > modem > router > computer is affecting your connection spped, as that is the scenario that almost everyone uses.
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