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
考研
The staggering variety of free stuff available on the Internet sometimes seems to have repealed the first law of economics: Ther
The staggering variety of free stuff available on the Internet sometimes seems to have repealed the first law of economics: Ther
admin
2019-09-30
37
问题
The staggering variety of free stuff available on the Internet sometimes seems to have repealed the first law of economics: There’s no such thing as
a free lunch
. But as so often happens, the dismal science actually has it right. When it looks like you’re getting something for nothing, somebody is paying, and it’s often instructive to know who that is.
I’ve been testing a new phone service called ooma that provides an interesting case in point. Once you pay $399 up front for a box called the ooma Hub and connect it to your phone and the Internet via your home network, you are promised free, unlimited phone calls over two lines, plus voice mail. The system works fine and is simple to set up.
When a voice-over-Internet call has to go to a regular phone number, a service such as ooma usually has to pay a "temination fee" to a carrier such as Verizon. Skype, for example, charges 2% per minute for calls outside the Skype network. But ooma avoids this by using some of its customers—those who have kept regular phone lines—to serve as gateways onto the local phone network at no charge.
When you want to call outside the ooma network, the call moves from your Hub over the Internet to a second landline-connected Hub within the destination’s local calling area The Hub dials the target number and patches the call through. In effect, ooma customers with landlines pay to keep the whole system going. You don’t even notice if your landline is being used because your own phone calls go out over your broadband connection, with your flat-rate monthly phone bill covering the ooma traffic. In fact, this improves the efficiency of the phone system by putting idle lines to work. But if ooma ever gains real traction, I expect a legal assault from big phone companies, which are losing income from termination fees.
Web services do take advantage of genuine economies. The phone network is more expensive than the Net. Lots of Net players build on these advantages. Skype relies on selected users who act, often without their knowledge, as "super nodes" to manage the system. FreeConference.com provides calls by taking advantage of regulatory quirks—namely, the stiff termination fees long-distance carriers must pay to certain rural phone companies that handle calls into their territory. In effect, the free conferences are subsidized by customers and shareholders of the long-distance carriers. You may as well enjoy free calls while you can. But it’s always a good idea to read the fine print. If it isn’t obvious who’s paying for a free service, it might well be you.
One cannot notice if the landline is being used by others because
选项
A、the ooma traffic cannot be calculated by the outside network.
B、your monthly phone bill still remains stable with new traffic.
C、your Hub will dial the target number from a second Hub.
D、the whole system keeps going with the broadband connection.
答案
B
解析
推理判断题。第四段第四句指出人们不会注意到电话费的变化,因为每月的电话费几乎都是固定的,故选B。
转载请注明原文地址:https://kaotiyun.com/show/oqe4777K
0
考研英语二
相关试题推荐
Pricesarcsky-high,withprofitstomatch.Butlookingfurtherahead,theindustryfaceswrenchingchange,saysanexpertofen
Pricesarcsky-high,withprofitstomatch.Butlookingfurtherahead,theindustryfaceswrenchingchange,saysanexpertofen
TheInternetaffordsanonymitytoitsusers,ablessingtoprivacyandfreedomofspeech.Butthatveryanonymityisalsobehind
TheInternetaffordsanonymitytoitsusers,ablessingtoprivacyandfreedomofspeech.Butthatveryanonymityisalsobehind
TheInternetaffordsanonymitytoitsusers,ablessingtoprivacyandfreedomofspeech.Butthatveryanonymityisalsobehind
In2010,afederaljudgeshookAmerica’sbiotechindustrytoitscore.CompanieshadwonpatentsforisolatedDNAfordecades--b
Formostofthe20thcentury,Asiaaskeditselfwhatitcouldlearnfromthemodern,innovatingWest.Nowthequestionmustber
随机试题
下列有关腹腔镜检查病人的并发症,应除外
慢性粒细胞白血病急性粒细胞白血病
按照五味理论,下列药物中具有辛味的是
关于《刑事诉讼法》“尊重和保障人权,保护公民的人身权利、财产权利、民主权利和其他权利”的规定,下列哪一选项是正确的?
股票是股份有限公司发行的,用以证明投资者的股东身份,并据以获取股息和红利的凭证。下列不属于股票的特征的是()。
在国际资本流动中,通过追求拥有企业控制权,获得经营利润的投资形式通常是()。
一个班有50名学生,他们的名字都是由2个或3个字组成的。将他们平均分为两组之后,两组的学生名字字数之差为10。此时两组学生中名字字数为2的学生数量之差为()。
比较研究发现,学前幼儿写字训练最合理有效的方法是()。
进程是程序的一次执行,与程序有很大的不同,二者的根本区别在于()。
A、Frontseattickets.B、Backseattickets.C、Boxtickets.D、Standingtickets.B本题考查事实细节。题目问的是能买到什么样的票。会话中女士说:“只剩后排座位票啦(onlyback
最新回复
(
0
)