https://www.syu.ac.kr/blog/%eb%94%94%ec%a7%80%ed%84%b8%ec%a0%95%eb%b6%80ict-%ec%a0%84%eb%ac%b8%ea%b0%80-%ed%95%b4%ec%99%b8-%ec%a7%84%ec%b6%9c%ec%a0%84%eb%9e%b5-%ec%84%b8%eb%af%b8%eb%82%98-%ec%b0%b8%ec%84%9d%ec%9e%90-%ec%82%ac/%ec%84%b8%eb%af%b8%eb%82%98%ed%8f%ac%ec%8a%a4%ed%84%b0%ec%9b%b9/