首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Before the arrival of the internet, computer files were exchanged via storage media such as floppy disks (软盘) which were sent by
Before the arrival of the internet, computer files were exchanged via storage media such as floppy disks (软盘) which were sent by
admin
2013-05-29
72
问题
Before the arrival of the internet, computer files were exchanged via storage media such as floppy disks (软盘) which were sent by post or delivered by foot, bike, car or train. After the appearance of the internet, a term was invented for such exchange of information: the sneakernet. Now that the internet is established, and our connections have become faster, the sneakernet sounds outmoded. Nevertheless, the opposite is true when larger files are considered. Because storage media evolve much faster than internet connections, it becomes ever more interesting to choose the route of physical transport over the internet.
One of the routes is via carrier pigeon(信鸽). This may sound ridiculous (and it has been a popular joke for many years), but thanks to shrinking storage media, the speed and capacity of the pigeon internet promises to become quite amazing.
A well trained contemporary carrier pigeon can maintain a speed of 50 kilometres an hour over a distance of 600 kilometres, and carry a weight of 1 gram. One gram does not seem to be much, but this weight can already contain quite some data. For instance, the Transcend Micro SD card weighing 1 gram has a capacity of 2 gigabytes.
Compared to a fibre connection, the pigeon has to surrender quite fast. This internet connection only needs 2.6 minutes to send 2 gigabytes. A carrier pigeon only flies 2 kilometres far in that time. A carrier pigeon is thus faster than a fibre connection when the distance is shorter than 2 kilometres. A broadband connection needs 4 hours to send 2 gigabytes, while the pigeon can reach a distance of 200 kilometres in 4 hours. This means that sending 2 gigabytes of information from Amsterdam to Brussels goes faster by carrier pigeon than by a broadband connection. A dial-up connection needs 3.3 days to send 2 gigabytes, so in that case, the pigeon (flying 600 km per day) is faster than the internet up to a distance of about 2,000 kilometres.
The bandwidth of a carrier pigeon increases faster than the bandwidth of the internet. Ten years in the future, a pigeon will be able to carry 2 terabytes (around 2,000 gigabytes). Our fibre connection will need 8.5 minutes for sending that amount of data. The carrier pigeon is then faster than a fibre connection if the distance is less than 7 kilometres-compared to 2 kilometres today.
The term "sneakernet" is probably more related to ______.
选项
A、storing larger computer files
B、the fast speed of the internet
C、sending digital data on the internet
D、traditional ways of sharing digital files
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/Q7TO777K
0
研究生英语学位课统考(GET)
相关试题推荐
Anumberofresearchershaveexaminedthevariables/strategiesthataffectstudents’learningEnglishasasecondlanguage.This
MostpeoplewhodevelopedLymedisease,atick-borninfectionthat’sendemicinpartsoftheNortheastandMidwest,areeasilyc
Ishappinessproportionaltoincome—tothemoneyapersonhas?Isamanwithtworoomsandloavesofbreadhappierthanaman
Todaybusinesscardsaredistributedbyworkingpeopleofallsocialclasses,illustratingnotonlytheuniquityofcommerciali
Planningisaveryimportantactivityinourlivesyetreallysophisticated.Itcangivepleasure,evenexcitement,【C1】______ca
Oneofthemostdifficultaspectsofdecidingwhethercurrentclimaticeventsrevealevidenceoftheimpactofhumanactivities
TheGalapagosIslandsareinthePacificOcean,offthewesterncoastofSouthAmerica.Theyarearocky,lonelyspot,butthey
Thejoysoftravel,havinglong______thedisabled,areopeninguptovirtuallyanyonewhohasthemeans.
Susannevertookanycookerycourses;shelearnedcookingby______usefultipsfromTVcookeryprograms.
Internetisavastnetworkofcomputersthatconnectsmanyoftheworld’sbusinesses,institutions,andindividuals.Theinterne
随机试题
甲在乙处修理汽车,因修理费未带足,遂将自己的一块手表放在乙处,约定第二天付清修理费后再把手表取走。乙占有该手表的依据是()
关于室间隔缺损的心脏听诊,以下哪项是错误的
A、妊娠49天以前B、妊娠10周内C、妊娠10~14周D、妊娠15~24周E、妊娠14~28周依沙吖啶引产术适用于
有关肺癌合并孤立性脑转移,较常采用的治疗措施是
属于健康的护理诊断的是
庭审过程中,被告人赵某指出,公诉人的书记员李某曾在侦查阶段担任鉴定人,并据此要求李某回避。对于赵某的回避申请,下列哪一选项是正确的?()(2007年司考,卷二,第34题)
《水利水电工程标准施工招标文件》(2009年版),下列不属于合同文件组成部分的是()。
根据下列材料。回答以下问题。随着基础设施建设不断加快,公路路网日益优化和城乡居民收入水平的提高,某省各类民用车辆拥有量保持稳步增长。至2012年年末,全省民用车(汽车、电车、摩托车、拖拉机、挂车和其他类型车等六类车)拥有量为862.70万/辆,比上年增长
A.下颌角下2cm绕下颌角弧形切口B.口内翼下颌皱襞内侧纵形切口C.下颌骨下缘上2cm作平行切口D.口内翼下颌皱襞处横形切口E.下颌骨下缘下1~1.5cm作平行切口咬肌间隙脓肿应作()。
类比二分搜索算法,设计k分搜索算法(k为大于2的整数)如下:首先检查n/k处(n为被搜索集合的元素个数)的元素是否等于要搜索的值,然后检查2n/k处的元素,……,这样,或者找到要搜索的元素,或者把集合缩小到原来的1/k;如果未找到要搜索的元素,则继续在得到
最新回复
(
0
)