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You can have a USB Serial (COM) port and you can connect PCs together using Serial (COM) port.
NIC
A hub or switch must be used to connect 3 PCs together. Two PCs can be connected using a single crossover cable.
If you don't have at least two wireless adapters for your pcs, yes you have to have a network cable in order to connect two pcs.
A network card is used to interface with a network. A network is basically a connection of PCs and possibly servers, but also refers to your connection to the Internet If you want to connect 2 or more PCs together or connect to the Internet you have to have a network card.
Sorry we don't have anything that will connect 3 pcs to 3 devices.
A Crossover Cable is used to connect 2 PCs (when a hub or switch is not used) to make the simplest network of all. (6th Edition, Page 852)
Yes & No. If you connect that phone with Metro PCS service, you could only use talk time. NO APPS, WEB or DATA! If you use WiFi then you could run APPS and WEB.
yes you can
Crossover Cable
a Crossover Cable.
cross cable, two LAN card one for each, ip address of same class, rj 45 connector,