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【碎碎念:一般面试官也不会问概念的啦,只是加强一下认知】
http是超文本传输协议,是互联网上应用最为广泛的一种网络协议,是一个客户端和服务器端请求和应答的标准,用于从WWW 服务器传输超文本到本地浏览器的传输协议。
https 协议是由 http 和 ssl 协议构建的可进行加密传输和身份认证的网络协议,比 http 协议的安全性更高,简单讲是 HTTP 的安全版。
【CA证书顾名思义就是由CA(Certification Authority)机构发布的数字证书】 https协议需要到ca申请证书,因而需要一定费用。也可以到中国数字证书网站上获取免费证书,但是使用免费的ca证书需要在浏览器那边点击信任次网站的证书才可以正常打开网页。
http不需要申请ca证书。
https 的端口为443。
http 协议的端口为 80。
https需要进行加密传输、身份认证。
http不需要进行加密和认证。
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