[单项选择] (74) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains。
A. Repeater
B. Bridge
C. Router
D. Galway

[单项选择]（）is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains。
A. Repeater
B. Bridge
C. Router
D. Galway

[单项选择] (74) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.
A. Repeater
B. Router
C. Bridge
D. Switch

[单项选择]The network layer provides services to the______layer. It can be based on either virtual circuits or datagrams. In both cases, its main job is routing packets from the source to the destination.
A. transport
B. application
C. presentation
D. data link

[填空题]The IMF supports globalisation and encourages all countries to globalise.

[单项选择]America supports international trade because we believe fundamentally that trade will enrich those nations who embrace its discipline. ( )
A. 美国支持国际贸易，因为我们确信，贸易会使那些拥抱行为准则的国家富裕起来。
B. 美国支持国际贸易，因为我们确信，贸易会使那些遵守行为准则的国家富裕起来。
C. 美国支持国际贸易，因为我们确信，贸易会使那些遵守行为准则的国家丰富起来。
D. 美国支持国际贸易，因为我们确信，贸易会使那些遵守学科纪律的国家富裕起来。

[单项选择]C++ fully supports （） programming.
A. visual
B. object-oriented
C. logic
D. natural language

[单项选择]The passage supports which of the following statements


A. No one really knows how the theater began.
B. Myths are no longer represented dramatically.
C. Storytelling is an important part of dance.
D. Dramatic activities require the use of costumes.

[单项选择]The passage supports which of the following conclusions


A. Without formal education, people would remain ignorant.
B. Education systems need to be radically reformed.
C. Going to school is only part of how people become educated.
D. Education involves many years of professional training.

[单项选择]

A transport layer protocol usually has several responsibilities．One is to create a process-to-process communication；UDP uses (1) numbers to accomplish this．Another responsibility is to provide control mechanisms at the transport level．UDP does this task at a very minimal level．There is no flow control mechanism and there is no(2) for received packet．UDP, however, does provide error control to some extent．If UDP detects an error in the received packet，it will silently drop it． The transport layer also provides a connection mechanism for the processes．The (3) must be able to send streams of data to the transport layer．It is the responsibility of the transport layer at (4) station to make the connection with the receiver, chop the stream into transportable units，number them，and send them one by one．It is the responsibility of the transport layer at the receiving end to wait until all the different units belonging to the same process have arrived，check and pass those that are (5) fre
A. hop
B. port
C. route
D. packet

[填空题]The IMF supports globalization in that it helps to create a______________.

[单项选择]The passage best supports which of the following statements


A. A minority entrepreneur who had no assistance from family members would not be able to start a business.
B. Self-help networks have been effective in helping entrepreneurs primarily in the last 50 years.
C. Minority groups have developed a range of alternatives to standard financing of business ventures.
D. The financial institutions founded by various ethnic groups owe their success to their unique formal organization.

[单项选择]What will happen if the dust aerosol layer develops


A. The earth will get extremely hot.
B. The balance between the amount of heat absorbed from the Sun and the amount lost could hardly be maintained.
C. The light of the Sun could no longer reach the surface of the Earth.
D. Infrared radiation could no longer be transmitted from the Earth to outer space.

[单项选择]Sometimes a parent supports the child's bad behaviour so that______.


A. they can show it is the school that is at fault
B. their child can develop a strong character
C. they can help their child get rid of the bad behaviour
D. they can "bribe" their child with their support

[单项选择]

The presentation layer is concerned with the （）and semantics of the information exchanged between two systems. The processes in two systems are usually exchanging information in the form of character （）, numbers, and so on. The information should be changed to bit （） before being transmitted. Because different computers use different encoding systems, the presentation layer is responsible for （） between these different encoding methods. The presentation layer at the sender changes the information from its sender-dependent format into a common format. The presentation layer at the receiving machine changes the common format into its （） -dependent format.

The presentation layer at the receiving machine changes the common format into its （） -dependent format.
A. receiver
B. user
C. server
D. customer