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目前傳輸與接入專業已經分為兩個不同的方向：無線與有線，由于新版本剛出，所以目前每日一練不區分無線與有線，后期會有不同版本的每日一練公布。

1、通信衛星中的雙變頻轉發器先把接收到的上行信號變為（）信號，經放大限幅以后再變為下行信號。
 處理轉發器則要對信號進行（）處理，然后經過重新調制、上變頻、功率放大后發向地面站。

A．基帶
B．中頻
C．射頻
D．數字

A．放大
B．壓縮
C．交換
D．解調

2、下列調制方式中，（）是ITU-T關于ADSL標準建議采用的。

A．2B1Q
B．DMT
C．TC-PAM
D．BPSK

3、會議電視業務向用戶提供以視覺為主、多媒體的視像通信，其接入方式基于（）接入組網。

A．寬帶
B．窄帶
C．移動
D．無線

4、第三代移動通信（3G）與第二代移動通信（2G）相比，提供的新業務能力是（）。

A．三方通話等語音增值服務
B．話費查詢等數據增值服務
C．短信息業務
D．高于300kbps的數據下載業務

5、電信運營商提供的虛擬網業務可以實現（）的功能，且可幫助用戶大大節省投資費用。

A．用戶小交換機
B．短信平臺
C．寬帶接入
D．視頻監控

6、CPU通過總線與內存和輸入/輸出設備連接，下列說法錯誤的是（）。

A．總線是連接CPU、內存、I/O設備等部件的一組公共信號線

B．總線分數據總線、地址總線和控制總線，程序指令和數據都存于內存，其中數據通過數據總線調入調出CPU，而程序指令通過控制總線調入CPU執行 

C．DMA技術使外圍設備與CPU并行工作，直接將數據在外設和內存之間交換
D．內存的工作速度相對于CPU的運算速度要低很多

7、為兼顧穩定性、可靠性和經濟性，在通信網中經常采用（）的網絡拓撲結構。

A．網狀圖

B．星型網

C．環型網

D．復合型網 

8、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 （）.

A．better than

B．maturer than

C．as good as

D．not as good as 

A．the different network administrative domains

B．the same network administrative domains and mobile users

C．mobile users

D．the same network administrative domains 

A．Voice -over -IP

B．the quality mechanism 

C．workload

D．Video-on-Demand

9、電信業務經營者向電信用戶提供電信服務時，應遵循的原則不包括（ ）。

A.價格合理
B.迅速
C.安全
D.穩定

10、通信網中，（ ）傳輸媒質不適合于局間通信。

A.衛星
B.光纜
C.雙絞線
D.微波

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