6.The()acts as an intermediary for...-环球网校

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6.The()acts as an intermediary for requests from clients seeking resources from other servers,often used for caching and security.

Proxy Server

DNS Server

DHCP Server

NTP Server

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正确答案:A

Proxy Server（代理服务器）充当客户端请求资源的中间人，主要用于缓存（加速访问）和安全控制（隐藏内网）。