【名词&注释】
真实性(authenticity)、交互性(interaction)、可视性(visibility)、外围设备(peripheral equipment)、缺一不可、信号线(signal line)、汉字编码(chinese character coding)、地址总线(address bus)、输入/输出设备
[单选题]（）是智能网的核心构件，应具有很高的可靠性，通常的配置至少是双备份的。
A. SSP
B. SCP
C. SDP
D. SMS
查看答案&解析
举一反三：
[多选题]【A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of different names, including packet voice, voice over packet, voice over the internet, internet telephone, and Voice over Ip（Voip）. But it appears the industry has settled on the term”Voice ove IP” in reference to the internet protocol, which controls the transfer of data over the internet. There are currently three ways to deliver VoIp to users, the first technique is found at the corporate level. Many companies are offering VoIP systerms that operate over a local area network. These systems involve a fair amount of equipment, such as VoIP servers, special IP-enabled telephones, and routers that can direct telephone calls. Today a large portion of corporate sites have converted their older internal telephone systems to VoIP systems that opreate over a LAN, thus converging two systems into one. A second common solution is the one often encountered at home. Using existing telephones, a special converter is added between the telephone and a high speed internet（DSL or cable modem）connection. The converter digitizes the voice signal and creates a stream of packets that are then sent over an ip connection.The third technique involves smart cell phones. Never cell technologies are all packet-based, thus requiring a telephone call to be converted to digital packets and sending those packets over IP networks.】From the paragraph above，a popular service that has attracetd the interest of companies and home users,is termed as （） . The data transfer over the Internet is controlled by the （） . At corporate level, many companies have replaced their older internal telephone systerms with （） that oprerate over a local area network.
A. voice over the internet B、voice over packet
B. Voice over IP
C. internet telephony A、packet B、internet protocol
D. industry
E. VoIp servers A、VoIP systems B、IP-enablde telephones
F. VoIP servers
G. routers
[单选题]对多媒体通信系统来说，（60） 3个特征必须是并存的，缺一不可，否则就不能称其为多媒体通信系统。
A. 集成性、分布性和同步性
B. 集成性、实时性和可视性
C. 集成性、交互性和同步性
D. 真实性、交互性和同步性
[单选题]CPU通过总线与内存和输入/输出设备连接，下列说法错误的是（ ）。
A. 总线是连接CPU.内存.I/O设备等部件的一组公共信号线
B. 总线分数据总线.地址总线(address bus)和控制总线，程序指令和数据都存于内存，其中数据通过数据总线调入调出CPU，而程序指令通过控制总线调入CPU执行
C. DMA技术使外围设备与CPU并行工作，直接将数据在外设和内存之间交换
D. 内存的工作速度相对于CPU的运算速度要低很多
[多选题]计算机中的数据可以分为数值数据和符号数据，下列选项中，属于数值数据的是（）。
A. AS
B. CII码
C. B
D. C
E. D码
F. 原码
G. 汉字编码(chinese character coding)
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