| 查看: 1201 | 回复: 10 | |||
[交流]
Shortage of Internet Addresses, but a Slow Move to New System
|
every morning I can listen to this for three times~~ Last Wednesday, June eighth, 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. Yet the old system could run out of addresses this year because of all the growth in online devices. Doug Szajda, a computer science professor at the University of Richmond in Virginia, explains. DOUG SZAJDA: "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 nineteen eighty, 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: "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 was many more than we would ever need." 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 nineteen ninety-eight. Doug Szajda says its most important feature is the ability to provide what seems like an unlimited number of IP addresses. 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: "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.” The process of switching to IPv6 can be complex and costly. This could explain why so few companies have made the switch. 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. And that's the VOA Special English Technology Report, written by June Simms. For more technology news, go to voaspecialenglish.com. I'm Steve Ember. adress https://voa.52en.com/voa-se-html/20116/voa-2011613104143.html |
回复此楼» 猜你喜欢
欢迎发来filecode的Mz6后的代码验证其规律
已经有50人回复
-
filecode
已经有11人回复
-
售SCI文章，我:8O.5.5.1O.54,科目全,可十急
已经有5人回复
-
售SCI-T0P文章，我:8O.5.5.1.O.54,科目齐全,可+急
已经有4人回复
-
售SCI一区T0P文章，我:8.O55.1.O.54,科目全,可十急
已经有5人回复
-
售SCI文章，我:8O5.5.1.O.54,科目齐全,可+急
已经有6人回复
-
售SCI一区T0P文章，我:8.O55.1.O.54,科目全,可十急
已经有4人回复
-
售SCI文章，我:8O5.5.1.O.54,科目齐全,可+急
已经有4人回复
-
小木虫上这么多卖论文的，真有人买论文么？感觉没必要啊
已经有12人回复
-
售SCI一区文章，我:8O5.5.1.O5.4,科目全,可伽急
已经有4人回复
★
小木虫(沙发+1，金币+0.5):恭喜抢个沙发，再给个红包
小木虫(沙发+1，金币+0.5):恭喜抢个沙发，再给个红包
|
|
2楼2011-08-15 08:24:39
★
小木虫(金币+0.2):抢了个小板凳，给个红包
小木虫(金币+0.2):抢了个小板凳，给个红包
 |
3楼2011-08-15 08:24:46
zhao-yf
铁杆木虫 (文坛精英)
珊瑚岛 漂姐姐 是也
- 应助: 3 (幼儿园)
- 金币: 6427.7
- 散金: 2289
- 红花: 63
- 沙发: 227
- 帖子: 12017
- 在线: 978.3小时
- 虫号: 1149280
- 注册: 2010-11-17
- 性别: MM
- 专业: 色谱分析
morning 4楼2011-08-15 08:35:19
qqhegg
荣誉版主 (文坛精英)
珊瑚小美-----小元家的九妹
- ESEPI: 5
- 应助: 10 (幼儿园)
- 贵宾: 3.115
- 金币: 23915.9
- 散金: 14806
- 红花: 179
- 沙发: 138
- 帖子: 11542
- 在线: 770.7小时
- 虫号: 1212338
- 注册: 2011-02-24
- 性别: MM
- 管辖: 基金申请交流
5楼2011-08-15 09:03:36
 |
6楼2011-08-15 10:24:41
oyljw
至尊木虫 (职业作家)
格物致知Professional
- 应助: 10 (幼儿园)
- 金币: 16606.1
- 散金: 120
- 红花: 27
- 帖子: 3191
- 在线: 1025.3小时
- 虫号: 482354
- 注册: 2007-12-22
- 性别: GG
- 专业: 理论和计算化学
7楼2011-08-15 10:38:49
|
|
8楼2011-08-15 11:17:21
 |
9楼2011-08-15 11:40:55
|
|
10楼2011-08-15 19:45:05
