Does router or wiring affect network speed?

I have a 10/100 Linksys router connected to a 10/100 network hub and a 10/100 network switch.  My computers are connected to the hub and switch.

I need more speed on my network, so I am about to replace the switch and hub with a single 16 port 10/100/1000 switch and add 1GB network cards to my PCs.

My questions are whether I have to also replace the router and if the Cat5 cable will restrict my network performance.  Do I need a 1GB router and Cat6 for all of this to work?
cerkseesAsked:
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wulfhereConnect With a Mentor Commented:
Hubs are TERRIBLE for network performance, since they basically replicate any packet that comes into them on all the interfaces. Moving to a 10/100/1000 switch is going to make things a lot faster.

Your router will not restrict network performance on PC-to-PC traffic on your LAN, as long as those PCs are in the same IP subnet (which is the default for most home networks). If they are in the same subnet, then your PCs will send traffic directly to each other, via your switch. If they are in different subnets, that traffic will need to pass through your router to go from PC to PC, and your Linksys is going to be a bottleneck.

Also, make sure you understand that your Internet traffic is going to go through the Linksys router, so that (and your WAN connection) will still be a bottleneck for Internet traffic.

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Tim
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cerkseesAuthor Commented:
Fantastic!  Thanks!
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