Permanent Perks

Permanent perks are only in Black Ops 2. They're perks that you earn in the game for example, in Tranzit, you can get Juggernog Pro. Which basically your health will be increased by 100% without buying Juggernog. And buying Juggernog will still get you more health.
There are numerous Permanent Perks. Another is Permanent Quick Revive where you can revive someone very fast without having to buy quick revive but buying quick revive let's you revive somebody even faster.
My favorite Permanent Perk is Permanent TombStone, this is only on Tranzit and Buried but when you go down, and you come back up you have all of your perks except for one. So if you have 4 perks and you go down, you'll only lose one perk which is the last one you got unless it's on solo. In this case you'll lose quick revive every time.
Note that these permanent perks can be lost easily. Some of them are not even worth getting because their so much harder to get and so easy to lose. Below is a link to all of the permanent perks and how to get and lose them.