DDN（Digital data network）就是数字数据网，是利用数字信道来传输数据信号的数字数据网。
DDN（Digital data network）就是数字数据网，是利用数字信道来传输数据信号的数字数据网。
相关考题：
在通信专业中，DSP的英文全称是（91），“自适应的“通常翻译为英文是（92）。A.Data Signal PulseB.Digital Signal ProcessingC.Data Stream PropertyD.Digital Spectrum Programming
在通信专业中，DSP的英文全称是（），自适应的通常翻译为英文是（）。A．Data Signal Pulse B．Digital Signal Processing C．Data Stream Property D．Digital Spectrum ProgrammingA．adaptive B．autonomous C．automatic D．active
数字摄影(DR)表示的英文单词是()。A.data recognizerB.dynamic rangeC.digital radiographyD.data readerE.degree of radiation
为了在程序中使用ODBC .NET 数据提供程序,应在源程序工程中添加对程序集______的引用. A.System.DatA.dllB.System.DatA.SQL.dllC.System.DatA.OleDb.dllD.System.DatA.Odbc.dll
.net类库中,操作SQL sever数据库所使用的命名空间是()。 A、System.Data.SqlClientB、System.SqlClientC、System.Data.OledbClient
为了在程序中使用ODBC.NET数据提供程序，应在源程序工程中添加对程序集()的引用。A.System.Data.dllB.System.Data.SQL.dllC.System.Data.Odbc.dllD.System.Data.OleDb.dll
ATM when referring to computers is a dedicated, connection switching technology that organizes digital data into 53-byte(69)units and transmits them over a physical(70)using digital signal technology. ATM is capable oftransniitfing at speeds of 155 or 622 MBit/s and faster.A．minutenessB．toothfulC．cellD．spot
Digital computer is controlled by internally stored programs and(66) of using common storage for all or part of a program and also for all or part of the data necessary for the execution of the programs; executing user-written or user-designated programs; performing user-designated manipulation of digitally represented discrete data, including.(67) operations and logic operations; and executing programs that(68) themselves during their execution.Analog computer's operations are analogous to the(69) of another system and that accepts, processes, and produces analog data.(70) computer integrates analog computer components and digital computer components by interconnection of digital-to-analog converters and analog-to-digital converters.A．qualifiedB．competentC．capableD．able
Which encryption type is used to secure user data in an IPsec tunnel?() A. symmetric key encryptionB. asymmetric key encryptionC. RSAD. digital certificates
Digital data can also be represented by (71)signals by use ofa modem. The modem converts a series of binary voltage (72) into an analog signal by encoding the digital data ontoa carrier frequency. The resulting signal occupies a certam spectrum of (73) centered about the carTier and may be propagated acrossa medium suitable for that carrier. The most common modems represent digital data in the voice(74)and hence allow those datato be propagated over ordinary voice-grade (75 )lines At the other end of the line, another modem demodulates the signal to recover the original data(71)A.analogB.digitalC.ModemD.electric
数字摄影（DR）是哪两个英文单词的缩写（）A、data recognizerB、dynamic rangeC、digital radiographyD、data readerE、degree of radiation
在ASP.NET应用程序中访问SqlServer数据库时，需要导入的命名空间为（）A、System.Data.OracleB、System.Data.SqlClientC、System.Data.ODBCD、System.Data.OleDB
Which two statements are true about the digital audio in a VoIP network？ （）A、 Standard encoding techniques create an uncompressed digital data rate of 4000 bps.B、 Standard encoding techniques create an uncompressed digital data rate of 8000 bps.C、 Standard encoding techniques create an uncompressed digital data rate of 64，000 bps.D、 Voice quality is not a concern if compression is not used.E、 Two methods of quantization are linear and logarithmic.F、 Two methods of compression are u-law and a-law.
Which benefit does digital subscriber line (DSL) systems for broadband access provide to the user?（）A、Secure access to company extranetB、Dedicated lines for high security data transferC、Simple solution for high-quality digital video using coaxial cableD、Data and audio signals that share the same communications infrastructure
Which test checks the transmitter and receiver of a local modem？（）A、data parityB、analog loop backC、local digital loop backD、remote digital loop back
Which encryption type is used to secure user data in an IPsec tunnel?（）A、symmetric key encryptionB、asymmetric key encryptionC、RSAD、digital certificates
单选题在ASP.NET应用程序中访问SqlServer数据库时，需要导入的命名空间为（）ASystem.Data.OracleBSystem.Data.SqlClientCSystem.Data.ODBCDSystem.Data.OleDB
多选题Which two statements are true about the digital audio in a VoIP network？ （）AStandard encoding techniques create an uncompressed digital data rate of 4000 bps.BStandard encoding techniques create an uncompressed digital data rate of 8000 bps.CStandard encoding techniques create an uncompressed digital data rate of 64，000 bps.DVoice quality is not a concern if compression is not used.ETwo methods of quantization are linear and logarithmic.FTwo methods of compression are u-law and a-law.
单选题Which benefit does digital subscriber line (DSL) systems for broadband access provide to the user?（）ADedicated lines for high security data transferBData and audio signals that share the same communications infrastructureCSecure access to company extranetDSimple solution for high-quality digital video using coaxial cable
判断题DDN（Digital data network）就是数字数据网，是利用数字信道来传输数据信号的数字数据网。A对B错