2015年中级通信工程师考试真题及答案(精选汇编)2

50.

With the explosive popularity of mobile devices, we have witnessed a steady increase in demand for mobile date service. In addition mobile users also expect to connect to the Internet for communicate and access to services through the best suitable connection, anywhere and at anytime. Although the seamless roaming capability is well supported in conventional. Cellular communication networks, roaming and interworking technologies are still immature in heterogenous wireless networks. Seamless roaming over heterogenous wireless networks will be an ongoing and improved process, due to the requirements from both end users and network administrators. From the wireless access networks belonging to different administrative domains, mobile users cannot always identify at every instance which network is the best one to access for their service. It is highly demanded to establish a network architecture which can facilitate mobile terminals to access the appropriate network in a cost-effective way. If a mobile user wants to move from one network to another with continuous service, the terminals have to cope with network change to maintain service seamlessly. Quality of service is a major issue that the end users should be provided with the satisfying service, while the network workload and cost should not too much increased. In addition, since end users are provided with numerous service ranging from Voice-over-IP to Video-on-Demand services, it is expected that users can experience the same quality for all the different service. Therefore, the network architecture need to be designed in such a way that the quality mechanism is incorporated so that users are served according to their individual QoS requirements.Based on the paragraph above, at present, seamless roaming over heterogenous wireless network is () in conventional cellular communication networks, Because of (), mobile users cannot always identify at every instance which network is the best one to access for their services. To satisfy the users QoS requirements, the network architecture design should include ()

49.

To maintain a telephone conversation over the Internet. The voice packets must arrive at their destination in ()

A Next Generation Network(NGN) is a (上题选择) network ,which is able to provide Telecomunication Services ti users and to make use of multiple broadband, QoS-enable transport technologies and in which service-related functions are () of the underlying transport-related technologies.

A Next Generation Network(NGN) is a () network ,which is able to provide Telecomunication Services ti users and to make use of multiple broadband, QoS-enable transport technologies and in which service-related functions are (下题选择) of the underlying transport-related technologies.

The VoIP gateway can perform the digitization, () and encapsulation required, and it controls the setup of VoIP calls between the calling device and the called device

“认证”英文通常翻译为()。

802.11n is a WLAN standard approved by the (), which can be used ti support data rate uo to 600Mbps

在通信专业中，TCP的英文全称是()

分布式数据库中的数据操作的原子性指的是()。

DB、DBMS和DBS三者之间的关系()。

数据库系统中，DBA使用的数据视图用()描述。

以下关于程序设计语言的叙述中，()是错误的。

()不是操作系统的主要目标。

下列属于系统软件的是()。

()不属于计算机的基本操作总线。

计算机的指令由操作码和()两部分组成。

我国正在实施“宽带中国”战略，在城市主要推广的固定宽带接入方式是()。

数值数据在计算机内用二进制编码表示，常用的编码有()。

()是计算机存储数据、表示数据的最小单位。

下列业务中，能令用户实现多媒体信息交流的是()业务。

以下关于ATM业务特点的叙述中，()是错误的。

与电脑相比，手机上网具有()的优点。

下列业务中，不属于数据通信业务的是()。

近年来，微博、微信等新型交流方式发展迅速，他们都是典型的()融合的产物。

与固定互联网相比，移动互联网支持的特有的应用类型是()。

际电信联盟通过的3G标准中，没有在我国采用的是()。

第三代移动通信(3G)与第二代移动通信(2G)相比，提供的新业务能力是()。

下列业务中，不属于移动通信业务的是()。

以下关于我国移动通信业务发展状况的叙述中，()是正确的。

某公司希望为其客户提供全国统一的客服电话，并让客户免费拨打，该公司可以使用()业务。

SKype是一个网络电话工具，用户通过在电脑上安装SKype客户端软件并注册，即可与其他用户语音对话，也可以拨打固定电话，这是一种()服务。

相比于录音电话，语音信箱业务的优点是()。

通信电源分基础电源和机架电源，UPS属于()。

用户若要防止家中固定电话被盗打，可使用()业务。

电子商务系统的基础服务平台由内容服务、支付服务、物流服务和()服务构成。

电路交换采用()技术。

电子商务系统的基础设施是()。

数字图像处理中的()技术可应用于老旧照片翻新处理。

图像质量的含义包括图像的()两个方面。

多媒体技术所涉及的媒体通常特指数字()媒体。

根据()所在位置和应用类型等，光纤接入技术可以分为FTTC、FTTB、FTTH和FTTR等。

以下不属于无线接入技术的是()。

在HFC网络中，通常是在()部分采用光纤作为传输介质。

利用电话网铜线实现非对称宽带传输的技术是()。

以下没有在光纤通信网络中使用的复用技术是()。

光接收机由()、放大器和相关电路组成。

根据调制过程是发生在激光器的内部还是外部，可以将光发射机中的调制分为()两种。

标准单模石英光纤在1550nm波长处的传输损耗是()db/km。