题目内容

当今世界不分国家、不分地区，每个人都是地球村的公民。“地球村”由理想变为现实的最重要条件是（）

A. 原子能工业的兴起
B. 遗传工程的发展
C. 因特网的发展
D. 航天事业的发展

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更多问题

Host 1 has just started up and requests a web page from web server 2. Which two statements describe steps in the process Host 1 uses to send the request to web server 2 (choose two)（）。

A. Host 1 addresses the frames to the MAC address of router R1
B. Host 1 looks in its ARP cache for the MAC address of router R1
C. Host 1 addresses the frames to the MAC address of web server 2
D. Host 1 sends the packets to router R1 to be forwarded to web server 2
E. Host 1 sends a broadcast ARP request to obtain the MAC address of webserver2

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