2020 数据通信与计算机通信网(Ⅰ)（任诗雨）(中国民航大学) 最新满分章节测试答案

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-02-18到2020-07-15
本篇答案更新状态:已完结

第一章 概述（Overview） 第一章单元测试

1、 问题: In a __ network, a dedicated communications path is established between two stations through the nodes of the network. The telephone network is the most common example.
选项：
A: frame relay
B: ATM
C: circuit switching
D: packet switching
答案: 【 circuit switching】

2、 问题:It is not necessary for a device to interface with the transmission system in order to communicate.
选项：
A:正确
B:错误
答案: 【错误】

3、 问题:The basic building block of any communications facility is the transmission line.
选项：
A:正确
B:错误
答案: 【正确】

4、 问题:The LAN is owned by the same organization that owns the attached devices.
选项：
A:正确
B:错误
答案: 【正确】

5、 问题:Networks that generally cover a large geographical area, require the crossing of public right-of-ways, consist of a number of interconnected switching nodes, and rely on circuits provided by a common carrier are __.
答案: 【Wide Area Networks (WANs)】

【作业】第二章 协议体系（Protocol Architecture） 第二章作业

1、 问题:电子版教材中第64-65页，“Problem”中的2.2，2.4，2.6，2.7题
评分规则: 【 态度认真，不得抄袭，有自己的思考
】

第三章 数据通信 第三章单元测验

1、 问题:A guided transmission medium is __ if it provides a direct link between two devices and those are the only two devices sharing the medium.
选项：
A:multipoint
B:simplex
C:point-to-point
D:wireless
答案: 【point-to-point】

2、 问题:A reduction in strength is __.
选项：
A:delay distortion
B:attenuation
C:pulsing
D:interlacing
答案: 【attenuation】

3、 问题:In full-duplex operation both stations may transmit, but only one at a time.
选项：
A:正确
B:错误
答案: 【正确】

4、 问题:Delay distortion occurs because the velocity of propagation of a signal through a guided medium varies with frequency.
选项：
A:正确
B:错误
答案: 【正确】

5、 问题:The maximum rate at which data can be transmitted over a given communication path under given conditions is referred to as the __.
答案: 【channel capacity】

第二章 协议体系（Protocol Architecture） 第二章单元测验

1、 问题:In a __ the modules are arranged in a vertical stack. Each layer in the stack performs a related subset of the functions required to communicate with another system.
选项：
A:protocol architecture
B:NSP
C:protocol data unit
D:frame relay
答案: 【protocol architecture】

2、 问题:The key features of a protocol are: syntax, semantics and __.
选项：
A:presentation
B:timing
C:network access
D:peer layering
答案: 【timing】

3、 问题:Each protocol provides a set of rules for the exchange of data between systems.
选项：
A:正确
B:错误
答案: 【正确】

4、 问题:It is not necessary for each host on a subnet to have an unique global internet address.
选项：
A:正确
B:错误
答案: 【错误】

5、 问题:Each application on a computer has an address that is unique within that computer known as __ or ports that allow the transport layer to support multiple applications at each computer
答案: 【Service Access Points (SAPs)】

第六章 数字数据通信技术 第六章测验

1、 问题:In __ transmission each block of data is formatted as a frame that includes a starting and an ending flag.
选项：
A:parallel
B:asynchronous
C:analog
D:synchronous
答案: 【synchronous】

2、 问题:A _____ is an isolated error condition that alters one bit but does not affect nearby bits.
选项：
A:parity error
B:burst error
C:single-bit error
D:streaming error
答案: 【single-bit error】

3、 问题:Burst errors can be caused by impulse noise

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