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  3. Thirty-five years after computer scientists at UCLA linked two bulky computers using a 15-foot gray cable, testing a new way for

Thirty-five years after computer scientists at UCLA linked two bulky computers using a 15-foot gray cable, testing a new way for

admin2009-04-27  99
问题     Thirty-five years after computer scientists at UCLA linked two bulky computers using a 15-foot gray cable, testing a new way for exchanging data over networks, what would ultimately become the Internet remains a work in progress.
    University researchers are experimenting with ways to increase its capacity and speed. Programmers are trying to imbue Web pages with intelligence. And work is underway to re-engineer the net-work to reduce spam and security troubles.
    (46)All the while threats loom: critics ware that commercial, legal and political pressures could hinder the types of innovations that made the Internet what it is today.
    Stephen Crocker and Vinton Cerf were among the graduate students who joined UCLA professor Len Kleinrock in an engineering lab on Sept. 2, 1969, as bits of meaningless test data flowed silently between the two computers. By January, three other "nodes" joined the fledgling network.
    (47)Then came e-mail a few years later, a core communications agreement called TCP/IP in the late 70s, the domain name system in the 80s and the World Wide Web—now the second most popular application behind e-mail—in 1990. The Internet expanded beyond its initial military and educational domain into businesses and homes around the world.
    Today, Crocker continues work on the Internet, designing better tools for collaboration. (48)And as security chairman for the Internet’s key oversight body, he is trying to defend the core addressing system from outside threats.
    He acknowledges the Internet he helped build is far from finished, and changes are in store to meet growing demands for multimedia. (49)Network providers now make only "best efforts" at delivering data packets, and Crocker said better guarantees are needed to prevent the skips and unexpected pauses now common with video.
    Cerf, now at MCI Inc., said he wished he could have designed the Internet with security built-in. Microsoft Corp., Yahoo Inc. and America Online Inc., among others, are currently trying to retrofit the network so e-mail senders can be authenticated—a way to cut clown on junk messages sent using spoofed addresses.
    (50)Many features being developed today wouldn’t have been possible at birth given the slower computing speeds and narrower Internet pipes, or bandwidth, Cerf said.

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答案作为因特网主要监督机构的安全主席，他正在尝试保护核心地址系统不受外界威胁。
解析 本句为简单句，为主谓结构he is trying…；不定式短语to defend the core addressing system from outside threats是目的状语；介词短语as security chairman for the Internet’s key oversight body是全句状语。本句结构简单，句子不长，直接翻译即可。句中oversight意为"监督"，这里oversight body指"监督机构"。
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