Hi! what is the differences between CAT 5 cable and a cable that we use between modem and computer. - Cat 5 just between router and computer? peter

There isn't? CAT5 is a specific specification (subcategory) of "Ethernet Cable). There is also CAT6 and CAT5e. They don't have any obvious visual differences and for most users, the three are interchangeable. -Ryan Adams Free Computer Tips and more:http://RyanTAdams.com Paid Tech Support: Black Diamond

The difference becomes on how that cable is wired; crossover or straight through [regular patch cable]. Modem to computer uses a patch Nic to Nic uses a crossover, as examples

Don't forget abot the Roll-over. Okay, so it is pretty much only used to connect a computer to Cisco's router control port. Yes, you'll want a standard patch cable to go from your Computer to the router(hub, or switch). The cross-over is needed for direct computer to computer communication without a medium such as a hub, router, or switch. Cat5, or 5e look pretty much the same at a quick glance. Flat twisted vs round twisted is going to blind side some. Cat6, or 6a is noticibly thicker than Cat5 cabling.