问答题Read the following text carefully and then translate the underlined segments
into Chinese. June 8th, 2011, was World IPv6 Day—the first
major deployment of Internet Protocol version 6. Hundreds of Internet service
providers and Web companies tested IPv6 on their websites. This new numbering
system for Internet addresses has been available for years. But very few
companies have switched to it. {{U}} {{U}} 1 {{/U}} {{/U}}{{U}}Yet
the old system could run out of addresses this year because of all the growth in
online devices.{{/U}} Doug Szajda, a computer science professor at the University
of Richmond in Virginia, explains. Doug Szajda says: "It's sort
of like the post office of the Internet. It tells you how to get information
from one computer to another. Currently, and since around 1980, the addressing
system has been IP version 4. But the problem with that is that we've run out of
addresses. So it's almost as if, when a new house is built, you can't give it an
address because you don't have any more." IPv4 was designed to
handle just over four billion IP addresses. Doug Szajda says that seemed like
more than enough. Doug Szajda says: "{{U}} {{U}} 2 {{/U}}
{{/U}}{{U}}At the time that IP version 4 was designed, the designers were
anticipating perhaps thousands of users of the Internet someday, and certainly
thinking that four billion addresses were many more than we would ever
need."{{/U}} Yet now, not just computers but smartphones, cars, televisions, game
systems and plenty of other devices all connect to the Internet. Each uses a
different IP address. The basic standards for IPv6 were first
published in 1998. {{U}} {{U}} 3 {{/U}} {{/U}}{{U}}Doug Szajda
says its most important feature is the ability to provide what seems like an
unlimited number of IP addresses.{{/U}} Well, there is a limit—three hundred forty
trillion trillion trillion in fact, or three hundred forty undecillion. That's
three hundred forty followed by thirty-six zeros. Experts say the challenge now
is to get the world to use it. Mr. Szajda says that was the real purpose of last
week's World IPv6 Day sponsored by the Internet Society. Doug Szajda says:
"{{U}} {{U}} 4 {{/U}} {{/U}}{{U}}It was less a worldwide test than
a means of generating some incentive for vendors to realize we can't drag our
feet anymore. This has to happen."{{/U}} {{U}} {{U}}
5 {{/U}} {{/U}}{{U}}The process of switching to IPv6 can be complex and
costly, which could explain why so few companies have made the switch.{{/U}}
CompTIA, the Computing Technology Industry Association, recently did an opinion
study. The group talked to more than four hundred information technology and
business leaders in the United States. Only twenty-one percent said they have
started doing work to upgrade their networks to the new system.