问题 单项选择题 共用题干题

An internet is a combination of networks connected by (1). When a datagram goes from a source to a  (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a  (4) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? The decision is based on optimization: Which of the available (5) is the optimum pathway?

空白(3)处应选择()

A.destinations

B.routers

C.packets

D.computers

答案

参考答案:B

解析:

互联网是由不同的网络通过路由器互联起来的。当数据包从源地发往目的地时,在到达目的地网络之前它可能经过多个路由器。路由器从一个网络接收到数据包之后就转发到另外一个网络。然而,一个路由器往往与几个网络连接,当路由器接收到一个数据时,它应该将数据包传向哪个网络呢?这将基于路径最优化决策。

问答题
阅读理解

B

Live the ‘American Dream’

What is it: Work & Travel USA

Who are qualified: Full-time college students, above 18 years old

About the program: Application for the 2009 Work & Travel USA program has just started. It's an 8~16 weeks' summer program for college students to work and travel in the US. Employers include Boeing, Hilton Hotel and 7-Eleven. For next summer, about 3,500 positions are open to Chinese students. Applicants must pass a language test and sometimes an interview, and pay a registration fee to join the program.

source: www. Cultureexchange. org)

Hundreds needed by Volkswagen

What is it: Shanghai Volkswagen jobs

Who are qualified: College students graduating in 2009

About it: Shanghai VW offers over 300 positions from engineering to marketing to college students graduating in 2009. Applicants should have an excellent academic record, CET-6 or the same level language certificate in German, and good computer skills. Campustalks will take place in Shanghai, Changchun, Harbin, Wuhan, Changsha, Nanjing, Beijing and Xi’ an from October.

(source: campus, chinahr. com/2009/pages/csvw)

Xiaonei looking for graduates

What is it: Oak Pacific Interactive (OPI) internships(实习)

Who are qualified: College juniors and first-year post graduate students

About it: OPI is now offering internship positions for test-engineer, development-engineer and assistant to the director of corporate culture. For engineering positions, candidates should major in computer science or a related field, have communication ability and be familiar with various development languages. For assistant to the director positions, candidates should be adept in document writing, activities organizing and office software.

(source: campus. xiaonei. com)

60. These advertisements are most probably advertisements        .

A. on the Internet intended for the general public to read

B. in a newspaper intended for large companies to read

C. on the Internet intended for college students to read

D. in a newspaper intended for college students to read

61. The opportunity of______is offered only to college students graduating in 2009.

A. working in America                                       B. traveling in America

C. positions in VW                                             D. OPI internship

62. If you want to apply for assistant to the director positions, you must__________

A. be good at document writing                           B. study computer science

C. have communication ability                                   D. be familiar with various languages