I am astounded by the number of meaningless objections with entirely uncreative reasoning.
If one actually thinks of the analogy in terms of the show, it is perpetrated by the Cylons decades after they analyze their opponent, mankind,
begin to infiltrate them and the largest source of their offense was made possible through a honey pot. Nothing more than social engineering followed by a well
orchestrated attack on an unsuspecting opponent. Mankind was caught completely unawares due to the fact they saw no threat.
Networking is not just electronic, it bridges both human and machine and nations have been using this to their advantages in intelligence gathering and war making with for decades. If any nation were to attack it would be from years of setting things in place, key assets with high ranking officials or technical officers. Why not infiltrate numerous communications and mobile devices or nearly any technological corporation and over years, make backdoors, gather your information, blackmail key targets or terrorize them for information and ways into more secure areas. Cripple infrastructure and cause widespread panic economically and either let it fester and cause civil unrest or further use electronic attacks.
The arguments about militaries being able to rely on older methods of communication, surveying or information gathering are purely asinine. If you cripple a modern militaries communications and targeting capability and then attack, the force that react quicker and is not wondering why everything went black will win. Grab the tempo, use it to your advantage. Their inability to pass information efficiently will allow you keep the tempo, you're not for one bite you're going for the whole thing. Blitzkrieg with overwhelming force, physically and digitally thanks to years of patience.