Just to clarify a point of the show, it isn't too old to be networked. They had that ability then. They had just previously fought a war with the Cylons, in which the Galactica was built for and fought in, so not networking was standard protocall then. The military decided, after a long peace, they should have networked ships, assuming the Cylon threat was gone. This cause nearly all modern military vessels to be open to exploit, except the Galactica and few remaining older vessels.