题目内容

POP3协议采用___1___模式,客户端代理与POP3服务器通过建立__2____连接来传送数据。
1、____POP3协议采用___1___模式,客户端代理与POP3服务器通过建立__2____连接来传送数据。
1、____

A. Browser/Server
B. Client/Server
C. Peer to Peer
D. Peer to Server

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