Guys lets say bitcoin will get 10 Trillion market cap and all the governments decide to "shut down" bitcoin because they will be scared that
they can't control or regulate it.
i think the best scenarios for them will be that All countries secretly make a meeting in order to shut down bitcoin.
it will break down like this, they will find them BIG pools IP's, big mining pools in each country and disconnect them all at once from the internet retaking over mining and disrupting the bitcoin network.
...
I think you'll find that a lot of the people with a decent amount of (personal) hashing power have their miners configured with multiple pools, AND a "fail-safe" of solo mining as a last resort.
What might happen is, as you describe, "cutting off the head" of big mining pools will definitely disrupt block generation - confirmation time will increase (slow down), but solo miners will still mine blocks eventually. And if the pools fail to revive themselves, the difficulty will eventually adjust based on how many people are still solo mining.
In the long term, this type of attack against Bitcoin would probably just make it stronger by emphasizing the de-centralized nature of the protocol.
Even if the attacker(s) started targeting people utilizing specific Bitcoin related TCP ports, people will start changing their software to use non standard ports to hamper the attacker's efforts.
TL;DR: The network would "find a way" to survive.
