Good day all ... I have cable internet service through my ISP. They provided me with a Motorola modem which is attached to the coax cable feed. I want to provide internet service to my children's computers, but becasue they are two floors up, the signal is usually poor. While perusing e-bay and other sites, I've notices that there are a lot of modems like the one provided by my ISP for sale. If I get one and hook it up to the cable line in one of my children's room, would that provide internet access?
Thanks!!

Why not go 802.11n wireless router?

that should work fine if you get the right modem

Yes but the cable company will charge you full price (I know because I checked this option out myself) for the second IP address.

Hence my comment about going wireless and setting up both comps with wireless n. :shrugs:

Yes, it will work....BUT as pointed out above, they PROBABLY* will see a second modem as a second account at full price.
*In a few rare cases, some provders can provision a second modem without chare BUT in an equal # of cases, their system will not allow a second account at the same address.
best bet is run cat5 cable up via return air duct/pipe chase/fished through the walls/ on the outside of the building (a good trim job can hide almost anything) all of which assumes you are the homeowner, or have their permission to spend your money (small amount for do it yourself to a couple hundred for a pro) making permenant improvements to their property.
OR
a more powerful directional antenna might work
OR check out current ethernet over wireline adapters (plug one in at the existing router and one at each remote computer or at a second wireless AP near the remote computers.
unlike earlier versions current model can run near full 100Mbps more that enough for 2 computers to access any speed on cable currently or soon to be offered.

Wired is the most secure, wireless and wireline both have some risk of outsiders accessing your system (wireleine slightly less) all concerns can be addressed by careful setup and practicing safe computing guidelnes

"n" is a bandwidth/channel hog, which may not work well in higher population density areas which also present higher security risks (the more people your signal reachs the more likely you find SOMEONE who will try to get access to YOUR wlan)
If you live in a 3 story away from people, it's not a problem, but you can probably afford a better system

How about G?

a,b,g and n all have their uses, a (not very common) or g with highly directional antennas can be a good short link if wired is not possible or not practical.
wireless has be highly promoted (mostly by mfger's and certain parts of the sales industry) as the coolest, must have, ultimate solution, instead of looking it is 1 type of solution for specific uses, with specific risks and costs.
IMHO it's best/most nessesary use is for mobile devices (strangely, what it was designed for) and only for temporary setup of of stationary devices.

Thank-you, T-Shirt. Always happy to receive a good free education. Much obliged.