Note: By network cable, I mean the CAT5e cable, which is the most popular type of networking cable that can handle gigabit connections. The newer network standard, CAT6, however, has exactly the same wiring (with the same tools), but requires CAT6-compatible parts.
Note: The wiring scheme above reflects the popular 568B wiring standard, which is recommended. You can also use the less popular 568A wiring standard ( white/green -> solid green -> white/orange -> solid blue -> white/blue -> solid orange -> white/brown -> solid brown). There's no difference in terms of performance between these two wiring standards, and you can also use both of these wiring standards on one cable (one for each end) to make it a crossover cable used to connect two Ethernet-ready devices directly to each other.