John Doe wants to make IPX/SPX and TCP/IP the two protocols used on his computer but is not sure whether he can do that on one nic card or if he needs a second one. How many protocols can you bind to a single nic card?

A single NIC (Network Interface Card) can have multiple protocols bound to it without limit. In Windows, you can enable TCP/IP, IPX/SPX, NetBEUI, and other protocols simultaneously on one network adapter. The protocols operate at different layers and don't conflict - the NIC handles frames and passes them to the appropriate protocol stack.