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How many subnets are possible in an enterprise that has just

题目
单选题
How many subnets are possible in an enterprise that has just been assigned an IPv6 prefix by itsISP?（）
A

65536

B

256

C

1024

D

16777216

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相似问题和答案

第1题：

What are the possible techniques to be used for practicing the structure that has just been presented? ___________.

A.repetition

B.substitution

C.single word prompts

D.picture prompts


正确答案：ABCD

第2题：

An enterprise has a web application running both HTTP and HTTPS. How many Clusters must becreated?()

A.1

B.2

C.3

D.4


参考答案：B

第3题：

When you meet a group of people, it is better to remember __

A. all their names B. a couple of names first

C. just their last names D. as many names as possible


正确答案：B

第4题：

How many drypowder extinguishers has your ship exactly been______．

A.produced

B.provided with

C.supplied by

D.met with


正确答案：B
你船准确的拥有多少干粉灭火器。

第5题：

Ezonexam has a Class C network and you need ten subnets. You wish to have as many addresses available for hosts as possible. Which one of the following subnet masks should you use?

A．255.255.255.192

B．255.255.255.224

C．255.255.255.240

D．255.255.255.248

E．None of the above


正确答案：C
解析：Explanation:Usingthe2n-2formula,wewillneedtouse4bitsforsubnetting,asthiswillprovidefor24-2=14subnets.Thesubnetmaskfor4bitsisthen255.255.255.240.IncorrectAnswers:A.Thiswillgiveusonly2bitsforthenetworkmask,whichwillprovideonly2networks.B.Thiswillgiveus3bitsforthenetworkmask,whichwillprovideforonly6networks.D.Thiswilluse5bitsforthenetworkmask,providing30networks.However,itwillprovideforonlyfor6hostaddressesineachnetwork,soCisabetterchoice.

第6题：

I know you are planning a trip to Europe this autumn.Do you know_______?

A：how much it will cost

B：how much has it cost

C：how much cost it will

D：how many will it cost


正确答案：A 

第7题：

A system has a mirrored data volume group that has a filesystem ／data of 10 logical partitions.How many physical partitions will thefilesystem have?()

A.1

B.2

C.10

D.20


参考答案：D

第8题：

I wonder how many years ago _______.

A.did you father retire

B.your father retired

C.has your father retired

D.your father has retired


参考答案：B

第9题：

How many subnets can be gained by subnetting 172.17.32.0／23 into a ／27 mask, and how many usable host addresses will there be per subnet?()

A. 8 subnets, 31 hosts

B. 8 subnets, 32 hosts

C. 16 subnets, 30 hosts

D. 16 subnets, 32 hosts

E. A Class B address can‘t be subnetted into the fourth octet.


参考答案：C

第10题：

共用题干
A Record-Breaking Rover
NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance. Since arriving on the Red Planet in 2004,Opportunity has traveled 25 .01 miles,more than any other wheeled vehicle has on another world.
“This is so remarkable considering Opportunity was intended to drive about 1 kilometer and was never designed for distance,”says John Callas,the Mars Exploration Rover Project Manager.
He works at NASA's Jet Propulsion Laboratory in Pasadena,California.“But what is really importantly is not how many miles the rover has racked up,but how much exploration and discovery we have accomplished over that distance.”
The solar-powered Opportunity and its twin rover,Spirit,landed on Mars 10 years ago on a mission expected to last 3 months. The objective of the rovers was to help scientists learn more about the planet and to search for signs of life,such as the possible presence of water.
Spirit stopped communicating with Earth in March 2010,a few months after it got stuck in a sand pit. But Opportunity has continued to collect and analyze Martian soil and rocks.
During its mission,Opportunity has captured,and sent back to Earth,some 187,000 panoramic and microscopic images of Mars with its cameras. It has also provided scientists with data on the planet's atmosphere,soil,rocks,aid terrain.
The rover doesn't seem to be ready to stop just yet. If Opportunity can continue on,it will reach another major investigation site when its odometer hits 26.2 miles. Opportunity has beer working on Mars since January 2004.
Researchers believe that clay minerals exposed near Marathon Valley could hold clues to Mars's ancient environment. Opportunity's continuing travels will also help researchers as the, plan for an eventual human mission to the Red Planet.

Opportunity is a record breaking rover in the sense of________.
A: how long is has stayed in space
B: how far it has traveled
C: how much investment it has involved
D: how many facilities it has been equipped with

答案：B
解析：
根据第一段“NASA's Mars rover Opportunity has boldly gone where no rover has gone before—at least in terms of distance.”可知，“机遇号”比任何漫游车行驶的距离都长。故选B。


从第二、三段可知，“机遇号”并不是为长途行驶而设计的，它本来预定只能行驶大约一千米。因此“机遇号”在被设计时，约翰并没有准确地知道它的价值。故本题选 B。


由第四段“The objective of the rovers was to help scientists learn more about the planet and to search for signs of life , such as the possible presence of water.”可知，把“机遇号”和 “勇气号”送上火星的目的之一是寻找生命的迹象。故本题选D。


根据文章最后两段可知，如果“机遇号”继续行驶的话，在它行驶到26.2英里的时候，它就会到达另一个重要的研究场地——马拉松谷，因此C项正确。倒数第二段第一句说，“机遇号”不会止步于此，故A项错误。B、D项文中并未提到。


由最后一段可知，“机遇号”接下来的工作能够帮助研究人员实施人类最终登陆火星的计划。故B项“科学家正努力把更多的人类送上火星”是正确答案。

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