八旗铁骑描述计算机因特网的学习英语.doc

2021年1月7日发(作者：周涌)
描述计算机因特网的学习英语
计算机英语
INTERNET
The Internet is a worldwide network of networks which
interconnects computers ranging from the simplest personal
computers to the most sophisticated mainframes and
supercomputers. This network of networks is used for an
extraordinary range of purposes - long distance collaborations,
retrieving free software and documents, accessing library
catalogs, logging in to supercomputers - the list of current
Internet activities and services is large and the range of possible
future applications is as unlimited as our imagination.
The Internet is huge. No one is exactly sure just how huge,
but there are over two million connected computers[1]. Because
it is in direct communication with satellites far above us, it could
even be said that the Internet is already bigger than the Earth.
And because the Internet is incredibly complex, there probably
isnt a single person who understands everything about it.
Remember this if you get confused and youll probably feel
better!
WHAT IS AN INTERNET
An internet (note the lower case i) is a computer network
which allows computers with distinctive software and hardware
to communicate, or internetwork[2]. Many kinds of computers
can be connected to an internet, and each computer can serve a
specialized role, allowing an internet to offer a wide variety of
services to its users. For example, you could use one internet
computer designed to perform complex calculations and then
send the output to another internet computer designed to display
colorful graphs.
WHAT IS THE INTERNET
The Internet is specific kind of internet. In The Internet
Passport, the Internet will be defined as the network of networks
which follow a set of rules known as the Internet Protocol (IP)
suite.
But what does this mean to you? It means that any computer
which is connected to the Internet can communicate with any
other Internet computer thanks to the rules of IP, and that a
message sent from one Internet computer to another will get to
the intended destination[3]. From the users perspective, this
works much the way the telephone system works. You can dial
from your phone to any other phone on the system no matter
what kind of telephone you have; you only need to know the
phone number of the person you want to reach.
WHAT IS THE INTERNET USED FOR
The Internet contains the electronic equivalents of
conference rooms and cafes, libraries and bookstores, post
offices and telephones, radio and television stations, newspaper
and magazines, and a growing variety of services that have no
counterparts in the real world[4].
Accessing Computer Resources
No matter how humble your own computer might be, if it is
connected to the Internet you can access the resources of
thousands of computers throughout the world. With an Internet
connection you can：
access online library catalogs, w copy computer files or
software from archives[5],
access databases for teaching or research, w obtain free
electronic books,
use educational and information services,
use directory services to find Internet users, and
access supercomputer sites.
Although the Internet is made up of many diverse computers,
together they work like one world-wide computer system.
Communicating with Other People
People communicating with people is the essence of the