https://www.expressvpn.com/kr/blog/%ec%99%93%ec%b8%a0%ec%95%b1-vs-%ec%8b%9c%ea%b7%b8%eb%84%90-%ec%96%b4%eb%96%a4-%ec%95%b1%ec%9d%b4-%eb%8d%94-%ec%95%88%ec%a0%84%ed%95%9c%ea%b0%80%ec%9a%94/