首页
登录
职称英语
[originaltext] It’s always fun to write about research that you can actually
[originaltext] It’s always fun to write about research that you can actually
游客
2023-09-02
39
管理
问题
It’s always fun to write about research that you can actually try out for yourself.
Try this:Take a photo and upload it to Facebook, then after a day or so, note what the URL link to the picture is, and then delete it Come back a month later and see if the link works. Chances are: It will.
Facebook isn’t alone here. Researchers at Cambridge University have found that nearly half of the social networking sites don’t immediately delete pictures when a user requests they be removed. In general, photo-centric websites like Flickr were found to be better at quickly removing deleted photos upon request.
Why do "deleted" photos stick around so long?The problem relates to the way data is stored on large websites: While your personal computer only keeps one copy of a file, large-scale services like Facebook rely on what are called content delivery networks to manage data and distribution. It’s a complex system wherein data is copied to multiple intermediate devices, usually to speed up access to files when millions of people are trying to access the service at the same time. But because changes aren’t reflected across the content delivery networks immediately, ghost copies of files tend to linger for days or weeks.
In the case of Facebook, the company says data may hang around until the URL in question is reused, which is usually "after a short period of time", though obviously that time can vary considerably.
30. Q:What does the speaker ask us to try out?
31. Q:What accounts for the failure of some websites to remove photos immediately?
32. Q:When will the unwanted data eventually disappear from Facebook according to the company?
选项
A、When the system is down.
B、When new links are set up.
C、When the URL is reused.
D、When the server is restarted.
答案
C
解析
就Facebook来说,公司表示等到URL链接被重新使用之后,照片才会被删除。
转载请注明原文地址:https://tihaiku.com/zcyy/2978675.html
相关试题推荐
[originaltext]W:IreallylikeVanGogh’swork.Icanfeelakindofuncontroll
[originaltext]W:IreallylikeVanGogh’swork.Icanfeelakindofuncontroll
[originaltext]W:IreallylikeVanGogh’swork.Icanfeelakindofuncontroll
[originaltext]Campmemorieslastforever!Wemakesuretheyareunforgettable!
[originaltext]Campmemorieslastforever!Wemakesuretheyareunforgettable!
[originaltext]MyfatherdiedwhenIwasninemonthsold,makingmymomasingle
[originaltext]W:Hi,Rex.How’syourhistorypapergoing?M:It’scomingalong.
[originaltext]W:Hi,Rex.How’syourhistorypapergoing?M:It’scomingalong.
[originaltext]Since1939,numerousscientificstudieshavebeenconductedt
[originaltext]Since1939,numerousscientificstudieshavebeenconductedt
随机试题
[originaltext]M:Weren’tyougoingtoconfirmyourbookingatthehotel?W:You’r
Forthispart,youareallowed30minutestowriteanessayontheimportance
B
根据《中华人民共和国水法》规定,在干旱和半干旱地区开发、利用水资源,应当充分考虑
A.乳房纤维腺瘤 B.乳管内乳头状瘤 C.乳腺囊性增生病 D.乳腺炎 E
某手机生产厂家为了适应市场的需要,开发了一款新的性能更先进、功能更完善的手机,但
A.1kN B.0.5kN C.1.414kN D.2kN
债务人不履行到期债务或者发生当事人约定的实现抵押权的情形,致使抵押财产被人民法院
股指期货合约的理论价格由其标的股指的价格、收益率和无风险利率共同决定。()
下列情形中,承包人()时,发包人请求解除建设工程施工合同的,应予支持。
最新回复
(
0
)