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Circuit Switching is problematic because data communications is（），that is， it is typically dominated by short bursts of activity with long periods of（）.
A．reliable B．bursty C．digital D．continuous A．latency B．transmission C．delay D．inactivity
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更多 “ Circuit Switching is problematic because data communications is（），that is， it is typically dominated by short bursts of activity with long periods of（）.A．reliable B．bursty C．digital D．continuous A．latency B．transmission C．delay D．inactivity ” 相关考题
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In data communication, data link is those parts of two data terminal equipments that are controlled by a protocol along with the(71) data circuit, which together enable data(72). So-called protocol means, in short, a set of rules that determines the behavior. of functional units in achieving communication.Data circuit, however, consists of a pair of(73) transmission channels that provides a means of two-way data transmission. Between data switching exchanges, the data circuit may or may not include data circuit-terminating equipment (DCE), depending on the type of(74) used at the data switching exchange. Between a data station and a data switching exchange or data concentrator, the data circuit includes the DCE at the data station end, and may include equipment(75) to a DCE at the data switching exchange or dam concentrator location.A．handshakingB．interconnectingC．linkageD．joining
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Asynchronous Transfer Mode(ATM)is a(16)that promises to change the fabric of local and wide area communications.The key advantage of ATM is the capability to move voice, data, graphics and(17)at speeds of up to 2 gigabits per second.An ATM switch allows you to create a(18)network that is completely independent from the(19)configuration of the network.ATM uses a(20)called cell switching to convert data into fixed length cells of 53 bytes each, so they can be switched very quickly and efficiently.A．technologyB．video imagesC．logicalD．physical
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Which of the following WAN protocols is a circuit switching technology?()
A. ISDNB. SONETC. Frame RelayD. ATM
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Packet-switching wireless networks are preferable(66)when transmissions are(67)bemuse of the way charges are(68)per packet. Circuit-switched networks are preferable for transferring large files or for other lengthy transmissions because customers are(69)for the(70)of time they use the network.A．toB．forC．thanD．only
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Packet-switching wireless networks are preferable(71)when transmissions are(72)because of the way charges are(73)per packet. Circuit-switched networks are preferable for transferring large files or for other lengthy transmissions because customers are(74)for the(75)of time they use the network.A．toB．forC．thanD．only
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Circuit-switching technology is used in Publish Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and code Division Multiple Access (CMDA) .It is a ( ) information transfer mode.A.connection orientedB.connectionlessC.high bandwidth utilizationD.poor real-time
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ATM(Asynchronous Transfer Mode) technology combines connection oriented mechanism and (72) mechanismA.circuit switchingB.packet switchingC.message switchingD.voice switching
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() switching was invented in the late 1960s for data communications.A．Frame B．Link C．Packet D．Line
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ATM (Asynchronous Transfer Mode) technology combines connection oriented mechanism and （） mechanism.A.circuit switching
B.packet switching
C.message switching
D.voice switching
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ATM（Asynchronous Transfer Mode）technology combines connection oriented mechanism and （ ） mechanism.ATM（异步传输模式）技术结合了面向连接机制和（ ）分组交换机制。A.circuit switching电路转接
B.packet switching分组交换
C.message switching信息转换
D.voice switching声音转换
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Circuit-switching technology is used in Public Switched Telephone Network（PSTN）, Global System for Mobile Communications（GSM） and Code Division Multiple Access（CDMA）. It is a （ ） information transfer mode.A.Connection oriented
B.connectionless
C.High bandwidth utilization
D.Poor-real-time
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B.computer
C.generalization
D.design
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帧中继中，虚电路VC（VirtualCircuit）是建立在两台网络设备之间的逻辑电路。根据建立方式，可以将虚电路分为（）.A、静态虚电路SVC（Static Virtual Circuit）B、临时虚电路TVC（Temporary Virtual Circuit）C、永久虚电路PVC（Permanent Virtual Circuit）D、交换虚电路SVC（Switching Virtual Circuit）
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Cisco Unified Communications 500 Series for Small Business， a critical part of the Cisco SmartBusiness Communications System， is a unified communications solution for small businesses that provides voice， data， voicemail. For which technology the Cisco UC520 provides integrated WLAN connectivity to mobile clients？（）A、 voice onlyB、 data onlyC、 data and voiceD、 None of above
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A laptop typically has a physical switch to disable which of the following features?（）A、BluetoothB、Hard Drive Impact ProtectionC、Data EncryptionD、Wireless
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Which of the following WAN protocols is a circuit switching technology?（）A、ISDNB、SONETC、Frame RelayD、ATM
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The user SCOTT executes the following command successfully to increase the salary values in one of his sessions： SQL UPDATE emp SET sal=sal*1.15 WHERE deptno=20； Before SCOTT ends the transaction， user HR who has the privileges on EMP table executes a query to fetch the salary details but finds the old salary values instead of the increased values. Why does HR still see the old data？（）A、because of redo data from redo log fileB、because of data from database buffer cacheC、because of data from a temporary tablespaceD、because of undo data from the undo tablespace
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CPDLC的英文全文是（）。A、controller-pilot data link communicationsB、control pilot using data link communicationsC、communications passed by data link circuitD、control pilot using long distancecommunicationstechnology
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单选题Circuit-switching technology is used in Publish Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and code Division Multiple Access (CMDA) . It is a ( ) information transfer mode.A
connection orientedB
connectionlessC
high bandwidth utilizationD
poor real-time
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多选题Cisco Unified Communications 500 Series for Small Business， a critical part of the Cisco Smart Business Communications System， is a unified communications solution for small businesses that provides voice， data， voicemail. Which three features does the Cisco UC520 support？（）Adistributed routingBCisco Unity ExpressCsecurity， firewall and VPNDanalog devices
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多选题帧中继中，虚电路VC（VirtualCircuit）是建立在两台网络设备之间的逻辑电路。根据建立方式，可以将虚电路分为（）.A静态虚电路SVC（Static Virtual Circuit）B临时虚电路TVC（Temporary Virtual Circuit）C永久虚电路PVC（Permanent Virtual Circuit）D交换虚电路SVC（Switching Virtual Circuit）
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单选题Cisco Unified Communications 500 Series for Small Business， a critical part of the Cisco SmartBusiness Communications System， is a unified communications solution for small businesses that provides voice， data， voicemail. For which technology the Cisco UC520 provides integrated WLAN connectivity to mobile clients？（）A
voice onlyB
data onlyC
data and voiceD
None of above
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