更多"[单选题]The connection between two net"的相关试题:
[单选题]The contract between the two companies will expire soon.
A.shorten
B.end
C.start
D.resume
[单选题]Networks can be interconnected by different devices in the physical layer networks can be connected by（ ）_or hubs.which just move the bits from one network to an identical network.One layer up we find bridges and switches which operate at data link layer.They can accept（ ）examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process in me network layer,we have routers that can connect two networks,If two networks have（ ）network layer,the router may be able to translate between the packer formats.In the transport layer we find transport gateway,which can interface between two transport connections Finally,in the application layer,application gateways translate message（请作答此空）.As an example,gateways between Internet e-mail and X.400 e-mail must（ ）the e-mail message and change various header fields.
A.syntax
B.semantics
C.language
D.format
[单选题]In multipoint networks , there are tree persistence methods when a station finds a channel busy.in the 1-persistent method,after the station finds the line idle,it sends its frame immediately.this method has the （ ） chance of collision because two or more stations may find the line （ ） and send their frames immediately. In the nonpersistent method , a station that has a frame to send （ ） the line . If the line is idle , it sends immediately If the line is not idle , it waits a （ ） amount of time and then senses the line again.The nonpersistent approach （请作答此空） the chance of collision because it is unlikely that two or more stations will wait the same amount of time and retry to send simultaneously The p-persistent approach combines the advantages of the other two strategies . It reduces the chance of collision and improves efficiency.
A.increases
B.equalizes
C.reduces
D.cancels
[不定项选择题]共用题干
第一篇
Two People, Two Paths
You must be familiar with the situation:Dad's driving,Mum's telling him where to go.
He's sure that they need to turn left.But she says it's not for another two blocks.Who has
the better sense of direction?Men or women.
They both do,a new study says,but in different ways.
Men and women,Canadian researchers have found,have different methods of finding
their way.Men look quickly at landmarks（地标）and head off in what they think is the right
direction.Women,however,try to picture the whole route in detail and then follow the path
in their head.
" Women tend to be more detailed,"said Edward Cornell,who led the study,"while
men tend to be a little bit faster and...a little bit more intuitive(直觉感知的）."
In fact,said Cornell,"sense of direction"isn't one skill but two.
The first is the"survey method".This is when you see an area from above,such as a
printed map.You can see,for example,where the hospital is,where the church is and
that the supermarket is on its right.
The second skill is the"route method".This is when you use a series of directions.
You start from the hospital,then turn left,turn right,go uphill一and then you see the
supermarket.
Men are more likely to use the survey method while women are more likely to use one
route and follow directions.
Both work,and neither is better.
Some scientists insist that these different skills have a long history.They argue it is
because of the difference in traditional roles.
In ancient times,young men often went far away with the older men to fish or hunt.
The trip took hours or days and covered unfamiliar places.The only way to know where you
were was to use the survey method to remember landmarks一the mountains,the lakes and
so on.
The women , on the other hand , took young girls out to find fruits and plants.These
activities were much closer to home but required learning well-used paths.So , women's
sense of space was based on learning certain routes.
Women developed a sense of space out of the need
A.Ato go fishing.
B.to go hunting.
C.to learn well-used paths.
D.to go swimming.
