1、软件水平考试(中级)网络工程师上午(基础知识)试题模拟试卷 2及答案与解析 1 在双绞线布线后要进行测试,一般情况,下面 (64)不是测试的项目。光纤测试的内容不包括 (65)项目。 ( A)近端串扰 ( B)拓扑结构 ( C)开路或短路 ( D)错对 ( A)衰励损耗 ( B)长度 ( C)近端串扰 ( D)时延 3 ATM when referring to computers is a dedicated, connection switching technology that organizes digital data into 53-byte(69)units and trans
2、mits them over a physical(70)using digital signal technology. ATM is capable oftransniitfing at speeds of 155 or 622 MBit/s and faster. ( A) minuteness ( B) toothful ( C) cell ( D) spot ( A) medium ( B) media ( C) matter ( D) plastid 5 In the following essay, each blank has four choices. Choose the
3、most suitable one from the four choices and write down in the answer sheet. A socket is basically an end point of a communication link between two applications. Sockets that extend over a network connect two or more applications running on(66)computers attached to the network. A socket(67)two addres
4、ses:(68). Sockets provide a(69)communication channel between one or more systems. There are(70)sockets separately using TCP and UDP. ( A) unique ( B) separate ( C) same ( D) dependent ( A) is made of ( B) composed of ( C) is composed of ( D) is consisted of ( A) Email address and IP address ( B) MAC
5、 address and port address ( C) MAC address and IP address ( D) port number and IP address ( A) full-duplex ( B) half-duplex ( C) simplex ( D) complex ( A) message and packet ( B) packet and frame ( C) stream and datagram ( D) flow and block 10 In the following essay, each blank has four choices. Cho
6、ose the best answer and write-down on the answer sheet. Microwave communication uses high-frequency(71)waves that travel in straightlines through the air. Because the waves cannot(72)with the curvature of the earth, they can be(73)only over short distance. Thus, microwave is a good(74)for sending da
7、ta between buildings in a city or on a large college campus. For longer distances, the waves must be relayed by means of “dishes“ or(75). These can be installed on towers, highbuildings, and mountain tops. ( A) optical ( B) radio ( C) electrical ( D) magnetic ( A) reflex ( B) distort ( C) bend ( D)
8、absorb ( A) transmitted ( B) transformed ( C) converted ( D) delivered ( A) material ( B) equipment ( C) medium ( D) channel ( A) repeaters ( B) radars ( C) telephones ( D) antennas 软件水平考试(中级)网络工程师上午(基础知识)试题模拟试卷 2答案与解析 1 【正确答案】 B 2 【正确答案】 C 【试题解析】 双绞线系统的测试元素包括连接图测试、线缆长度测试、衰减、近端串音衰减、错对、开路或短路。 光纤测试包括衰
9、减、带宽、长度与耐延。 3 【正确答案】 C 4 【正确答案】 B 【试题解析】 cell意思为 “单元,细胞 ”, cellunits在题目中意思为 “信元 ”;medium意思为 “介质,媒质 ”,它的复数形式为 media或者 mediums。本题主要介绍 ATM技术传送的信元及其传输速率。 5 【正确答案】 B 6 【正确答案】 C 7 【正确答案】 D 8 【正确答 案】 A 9 【正确答案】 C 【试题解析】 翻译如下。 Socket是两个应用之间的联系接口。 Socket使网络中不同的计算机之间的应用能够联系在一起。一个 Socket有两个地址:端口号和 IP地址。 Socket提供了在多个系统中全双工通信的方式。 TCP在 Socket传递的是字符流,而 UDP传递的是数据报。 10 【正确答案】 B 11 【正确答案】 C 12 【正确答案】 A 13 【正确答案】 C 14 【正确答案】 D