https://zh.donghootech.com/%e4%ba%a7%e5%93%81/%e8%a7%86%e8%a7%89%e7%94%b5%e7%bc%86/gige-%e8%a7%86%e8%a7%89%e7%94%b5%e7%bc%86/%e5%b8%a6-rj45-%e9%94%81%e5%ae%9a%e8%9e%ba%e9%92%89%e7%9a%84-gige-cat6-%e8%a7%86%e8%a7%89%e7%94%b5%e7%bc%86/