No. You need to connect the ethernet cable to a modem or router. You can disconnect the PC ethernet cable from the modem and connect an ethernet cable from the Xbox 360 to the modem until you purchase a router.
If for instance you have a PC connected to the internet with an ethernet cable at a cable modem you can unplug the ethernet cable to the PC at the modem and Plug in a ethernet cable from the PS3 to the modem and a connection to the internet is possible. If the PC and PS3 are close enough you can just unplug the PC ethernet cable at the PC and move it over to the PS3. The first time you do this you need to go to the PS3 network setting and auto set the network settings. When you are done using the PlayStation 3 you just unplug the ethernet cable for the PS3 from the modem and plug the PC cable back into the modem for the PC to go back online or switch the cable back if it was close enough. When you get tired of doing this just purchase a router and plug the PS3 and PC into the router and plug the router into the modem.
You have to have a Ethernet or Wireless card in your PC, then you can connect via Ethernet cable or wireless.
cat 5 Ethernet cable
Laplink is a cox cable that is used to transfer from PC to PC files, data, programs, etc.
ethernet cable
is it a straight ethernet or a crossover? i am using a Motorola SURFboard SB5120. You'll only need a straight ethernet cable for that.
coaxial
We can do so using an ethernet cable or through wifi(requires wifi adapter).
Use a CAT-5, also known as an Ethernet cable.
In many cases it does, but I have purchased them both ways.
Ethernet