Ethernet connection over 120 metre distance

I have a requirement to communicate over a 100MB/sec ethernet segment at a distance of 120 metres. I have read that the maximum segment length is 100m.

Would I need some form of repeater or other hardware to overcome the distance limit?

Can anyone recommend a solution?

Many thanks.

Using a higher quality cable would solve the problem (such as cat6). Or putting an inline repeater in the line (like a hub) would also solve the problem.
Fiber wouldn't really be cost effective in this situation if all you need is a 100mb connection. Though even if you needed gigabit later I'm sure cat6 would handle it at that range just fine.

It would need to be a switch. A simple hub or repeater (by definition) will, in fact, cure the single segment eletrical limitation of 100m. However, it will do nothing for the latency requirement of half-duplex ethernet segments (52us in 10Mb, 5.2us in 100Mb). In order for the "CD" part of CSMA/CD to work, there has to be a switch or some kind of store-and-forward, full-duplex device in the middle.