https://www.syu.ac.kr/blog/%ec%a0%9c2%ea%b8%b0-ip%ea%b4%80%eb%a6%ac-%ec%8b%a4%eb%ac%b4%ec%9d%b8%ec%9e%ac-%ec%96%91%ec%84%b1-%ea%b5%90%ec%9c%a1/%ec%a0%9c2%ea%b8%b0-ip-%ea%b4%80%eb%a6%ac-%ec%8b%a4%eb%ac%b4%ec%9d%b8%ec%9e%ac-%ec%96%91%ec%84%b1-%ea%b5%90%ec%9c%a1-%ec%b7%a8%ec%97%85%ec%97%b0%ea%b3%84%ea%b3%bc%ec%a0%95-%ec%9e%90%eb%a3%8c/