内容正文:
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UNIT 3 THE INTERNET
单元核心素养
单元话题导读
A Brief History of the Internet
The Internet started
in the 1960s as a way for
government researchers to
share information. Computers
in the 60s were large and immobile① and in order to
make use of information stored in any one computer,
one had to either travel to the site of the computer or
have magnetic computer tapes sent through the
conventional② postal system.
Another catalyst(催化剂)in the formation of
the Internet was the heating up of the Cold War.
Russias launch③ of the Sputnik satellite spurred the
U. S. Defense Department to consider ways information
could still be disseminated (传播)even after a
nuclear attack. This eventually led to the formation of
the ARPANET (Advanced Research Projects Agency
Network),the network that ultimately④ developed
into what we now know as the Internet. ARPANET
was a great success but membership was limited
to
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certain academic and research organisations who had
contracts with the Defense Department. In response to
this,other networks were created to provide information
sharing.
January 1,1983 is considered the official
birthday of the Internet. Prior to⑤ this,the various
computer networks did not have a standard way to
communicate with each other. A new communications
protocol was established⑥ called Transfer Control
Protocol / Internetwork Protocol (TCP / IP ). This
allowed different kinds of computers on different
networks to “talk”to each other. ARPANET and the
Defense Data Network officially changed to the TCP /
IP standard on January 1,1983,hence the birth of
the Internet. All networks could now be connected by
a universal.
词海拾贝
①immobile adj.不能移动的
②conventional adj.普通的
③launch n.发射
④ultimately adv.最后,最终
⑤prior to在……之前
⑥establish vt.建立
典句欣赏
Computers in the 60s were large and immobile
and in order to make use of information stored in any
one computer,one had to either travel to the site of
the computer or have