NO
You can share a USB modem internet to other computers on the network by simply creating a wireless network with the comp where the modem is connected and then connecting the other computers to the network via the wireless network that you created.
Apple Macs and other types of computers can be networked together and can happily share a modem.
you will need a router if you have a modem or if your isp gives you a modem router combo and you want to share with more computers you will need a switch
Wi-Fi Modem.
yes if the computers are connected via a (RJ45) network cable then they can share resources such as internet
A analog modem is a typical modem found in personal computers. A digital modem is similar to a DSL type modem. Most computers do not have digital modems.
FUNCTIONS OF MODEM
Beween the cable modem and the workstations
No, your signal will not weaken with two or more computers accessing the modem. Most modems operate on a 3G network, these modems offer over 300kbits of speed and can accomodate multiple computers. Many Cafe's, libraries and bookstores like Barnes and Noble offer this type of WIFI for their patrons. So, there should not be a problem with you setting up your computers to one wireless modem.
A router is a device that connects to your modem to share your internet connection with other computers. A wireless router uses a power cord and an Ethernet cable to connect from the modem to the router without the need of a connection between the router and the computers it's sharing the Internet connection with. A USB wireless router connects to the modem using a single USB connection that serves as both the power supply and data connection.
You can not connect a DSL modem/Router to a Cable modem the are two completely different devices. Basically one speaks English the other speaks Mandarin and neither has Rosetta Stone.
One can purchase an ethernet hub which would allow two computers to share a link with the same modem. This will simeotaneously link both computer from a up using a tcp/ip protocol.