Thank you for explaining it so clearly, I understand it well.

maltra2208

This is the first step of the network basics lecture that you can learn even if you don't know the basics of networks, "Network Model".

penterester

Sorry for the late reply. 
Thank you for the review. Happy New Year~

네트워크의 니은자도 몰라도 배울 수 있는 네트워크 기초 강의의 첫번째 스텝 "네트워크 모델" 편입니다.