I took away from the article something more to the effect that the Marine Corps is protecting their network (and the extremely sensitive information on it) from

I took away from the article something more to the effect that the Marine Corps is protecting their network (and the extremely sensitive information on it) from malicious software which may get on one of the computers after some unsuspecting soldier clicks on an innocent enough looking link. If I was a hacker intent on getting into the military network this is exactly how I would do it.