I'm curious all 2 parts of Star Trek about their security systems over their space!!

Rating: 5/10 (20 May 2013)

I'm curious all 2 parts of Star Trek about their security system inside the movie,let me get down to the "Into Darness". Any conflict or fight activities that's happening in the Star Fleet's space, especially over the Earth's space which is very strict area and high securities. There should be some very efficiently security system or high protection by the Fleet, but it seems there are just the Enterprise with Khan's battleship, I knew it's possible that the Khan's ship is the most advance one over the others but it's not possible he can fight alone with large fleet's that patrolling around the Earth's space.
This is the same point of the 1st part, when Romulan (came through the black hole 25 years ago) can harm to Valcan's planet, as the Valcan has the most advance technology, are there any Valcan's fleet protecting the area? Don't tell that because Valcan is peaceful enough which is not necessary to have any guarding fleet for them self.
I' apologize if my Eng may difficult to understand, because ENG is not my main language.