[Suhiir]

That "netted enterprise" assumes maximum use of and effect from the various systems. OK, you lose your ability to share info with everyone else, so your overall battlefield awareness is reduced (probably drastically). Does that make all your combat systems useless? By no means. Pilots can still spot and engage targets, artillery can still be called in via radio, etc.

We've had GPS for years, yet in the Marines at least we still train with, and use a map an compass because only a fool would assume you'll always have batteries and satellite links.

So yes, hacking and EMP will effect things, but it won't make everything useless.