How many traffic classes are supported on the ERX Edge Router？（）

A.One.

B.Two.

C.Three.

will have on their network and to assign a QoS value to each traffic flow. The client has identified the following applications: Internet traffic, Oracle, network-based backups, AOL Instant Messenger, IP routing, voice, and voice signaling.Given these types of applications, how many different classes will need to be configured in QoS？（）

A. 8

B. 6

C. 9

D. 5

A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface

B.Configure each Frame Relay circuit as apoint-to-point line to support multicast and broadcast traffic

C.Configure many sub-interfaces on the same subnet

D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces

A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface

B.Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic

C.Configure many sub-interfaces on the same subnet

D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces

trator came to you for advice while trying to implement load balancing across part of their EIGRP network. If the variance value is configured as 2 on all routers and all o ther metric and K values are configured to their default values, traffic from the Internet to the data center will be load balanced across how many paths？ （）

A. 1

B. 2

C. 3

D. 4

E. 5

Passage Three

No one knows exactly how many disabled (残废的) people there are in the world, but estimates suggest the figure is over 450 million. The number of disabled people in India alone is probably more than double the total population of Canada.

In the United Kingdom, about one in ten people have some disability. Disability is not just something that happens to other people. As we get older, many of us will become less mobile (可动的), hard of hearing or have failing eyesight.

Disablement can take many forms and occur at any time of life. Some people are born with disabilities. Many others become disabled as they get older. There are many progressive disabling diseases. The longer time goes on, the worse they become. Some people are disabled in accidents. Many others may have a period of disability in the form. of a mental illness. All are affected by people's attitude towards them.

Disabled people face many physical barriers. Next time you go shopping or to work or visit friends, imagine how you would manage if you could not get up steps, or on to buses and trains. How would you cope if you could not see where you were going or could not hear the traffic？ But there are other barriers: prejudice can be even harder to break down and ignorance inevitably represents by far the greatest barrier of all. It is almost impossible for the able-bodied to fully appreciate what the severely disabled go through, so it is important to draw attention to these barriers and show that it is the individual person and their ability, not their disability, which counts.

41. The first paragraph points out that ______.

A. it is possible to get an exact figure of the world's disabled people

B. there are many disabled people in the world

C. the number of disabled people in India is the greatest

D. India has not much more disabled people than Canada

and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.

Without proper planning, tourism can cause problems. For example, (21) many tourists can (22) public places that are also enjoyed (23) the inhabitants(居住者) of a coun- try: If tourists (24) too much traffic, the inhabitants become annoyed and (25) . They begin to dislike tourists and to (26) them impolitely. They (27) how much tourism can help the country's economy. It is important to (28) about the people of a tourist attraction and how tourism affects it. Tourism should help a country (29) the customs and beauty that attract tourists.

Too much tourism can be a problem. If tourism (30) too quickly, people must leave other jobs to work in the tourism industry. This (31) that other parts of the country's economy can suffer.

On the other hand, if there is not enough tourism, people can (32) jobs. Business can also lose money. It (33) a great deal of money to build large hotels, airports, air terminal, first class roads, and other support facilities(设施) (34) by tourist attractions. For example, a major international-class tourism (35) can cost as much as 50 thousand dollars per room to build. If this room is not used most of the time, the owners of the hotel lose money.

21.

A. so

B. how

C. too

D. rather

Questions are based on the following passage．

Without proper planning, tourism can cause problems．For example, too many tourists can crowd public places that are also enjoyed by the inhabitants of a country． If tourists create too much traffic, the inhabitants become annoyed and unhappy． They begin to dislike tourists and to treat them impolitely． They forget how much tourism can help the country's economy．

(79) It is important to think about the people of a destination country and how tourism affects them． Tourism should help a country keep the customs and beauty that attract tourists． Tourism should also advance the well-being of local inhabitants．

Too much tourism can be a problem． If tourism grows too quickly, people must leave other jobs to work in the tourism industry． This means that other parts of the country's economy can suffer．

On the other hand, if there is not enough tourism, people can lose jobs． Businesses can also lose money． It costs a great deal of money to build large hotels, airports, air terminals, first- class roads, and other support facilities needed by tourist attractions． (80) For example, a major international-class tourism hotel can cost as much as 50 thousand dollars per room to build． If this room is not used most of the time, the owners of the hotel will lose money．

Building a hotel is just a beginning． There must be many support facilities as well, including roads to get to the hotel, electricity, sewers to handle waste, and water． All of these support facilities cost money．If they are not used because there are not enough tourists, jobs and money are lost．

第56题答案为 查看材料

A.conditions

B.cases

C.times

D.occasions