I have not found this threat defense, but recently when I work, I can always see some information about threat defense, I don’t know about this threat defense is really a bit, so I want to learn threat defense knowledge, I of this knowledge is really curious, but now, I think this knowledge or learn some good for my future work, to meet the work we do, it is now in use is more, when others haven’t started learning, I went to learn this knowledge I think it is plugged in, until we are really used, I wouldn’t worry about it because they don’t understand.