https://velog.io/@janeljs/Internet-Network
https://velog.io/@janeljs/HTTP-basic
https://velog.io/@janeljs/HTTP-method
Chapter 8 예외처리 1~14
https://velog.io/@janeljs/Java-Exception
Chapter 16 네트워킹 1~21
https://velog.io/@janeljs/Java-Socket-Programming
와우 나중에 제인블로그보고 공부해야겠네요 ㅋㅋㅋ