GNB, LNB, PDP, PLP 그리고 TDD
https://medium.com/@totuworld/%EC%B2%98%EC%9D%8C-%EB%A7%8C%EB%82%98%EB%8A%94-it-%EC%9A%A9%EC%96%B4%EB%A5%BC-%EC%9C%84%ED%95%9C-%EC%95%88%EB%82%B4%EC%84%9C-03-c62ef6637a7b
https://medium.com/@totuworld/%EC%B2%98%EC%9D%8C-%EB%A7%8C%EB%82%98%EB%8A%94-it-%EC%9A%A9%EC%96%B4%EB%A5%BC-%EC%9C%84%ED%95%9C-%EC%95%88%EB%82%B4%EC%84%9C-03-c62ef6637a7b