题目内容

代理服务器(Proxy Server)等同于内网与Internet的____。

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Proxy处于客户机与服务器之间,对于服务器来说,Proxy是____,Proxy提出请求,服务器响应;对于客户机来说,Proxy是____,它接收客户机的请求,并将服务器上传来的数据转给客户机。它的作用如同现实生活中的代理服务商。

当客户端在浏览器中设置好Proxy服务器后,所有使用浏览器访问Internet站点的要求都不会直接发给目的主机,而是首先发送至____。

开机自动启动squid服务的命令是

A. systemctlstartsquid
B. systemctl restartsquid
C. systemctlenablesquid
D. systemctldisable squid

Which of the following statements belong to Einstein's achievements in physics?

A. It was proved that atoms and molecules existed.
B. Light came in little bits (or photons)
C. Space and time, like threads in a common fabric,could be bent, stretched and twisted.
D. E=mc²

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