What kind of courses should i take to become a Network Administrator?

None of the programming courses are likely to be directly applicable to an administrator position. Systems Development is another longshot...like programming, that's more aimed at user applications than general support. E-commerce might have some minimal applicability, but I'd still consider it unlikely. Cisco networking is the only one directly applicable, uming that any of your potential employers use Cisco. Even if not, it at least will give you a taste of some of the the usual sort of tasks you'd be expected to perform.