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 benefit does digital subscriber line (DSL) systems for broadband access provide to the user?（）
- A、Secure access to company extranet
- B、Dedicated lines for high security data transfer
- C、Simple solution for high-quality digital video using coaxial cable
- D、Data and audio signals that share the same communications infrastructure
相关考题：
Which of the listed devices may be used as a digital device?A.variable resistorB.diodeC.strain gaugeD.thermistor
When comparing analog display inputs to digital display inputs, which of the following is anadvantage that digital has over analog?() A. Allows for higher brightnessB. More crosstalkC. Sustains higher resolutionsD. Supports widescreen resolutions
Which of the following transmits a digital signal?() A. VGAB. XGAC. Component videoD. DisplayPort
What does DVI stand for?() A. Dual Visual InterfaceB. Display Vertical InterfaceC. Digital Visual InterfaceD. Digital Vision Interchange
Without ______ to the foregoing，every such servant，agent and subcontractor shall have the benefit of all provisions contained herein benefiting the carrier as if such provisions were expressly for their benefit； and in entering into this contract，the carrier，to the extent of those provisions does so not only on its own behalf，but also as agent and trustee for such servants，agents and sub-contractors.A.damageB.injuryC.breakD.prejudice
What does Savvy Shoppers send to clients when shopping?A. Prices and photographs of clothing itemsB. Precise measurements and digital photosC. Gift certificates for tailoring servicesD. Information about the work they do
Text 3 The power and ambition of the giants of the digital economy is astonishing—Amazon has just announced the purchase of the upmarket grocery chain Whole Foods for$13.5bn，but two years ago Facebook paid even more than that to acquire the WhatsApp messaging service，which doesn’t have any physical product at all.What WhatsApp offered Facebook was an intricate and finely detailed web of its users’friendships and social lives.Facebook promised the European commission then that it would not link phone numbers to Facebook identities，but it broke the promise almost as soon as the deal went through.Even without knowing what was in the messages，the knowledge of who sent them and to whom was enormously revealing and still could be.What political journalist，what party whip，would not want to know the makeup of the WhatsApp groups in which Theresa May’s enemies are currently plotting?It may be that the value of Whole Foods to Amazon is not so much the 460 shops it owns,but the records of which customers have purchased what.Competition law appears to be the only way to address these imbalances of power.But it is clumsy.For one thing,it is very slow compared to the pace of change within the digital economy.By the time a problem has been addressed and remedied it may have vanished in the marketplace,to be replaced by new abuses of power.But there is a deeper conceptual problem,too.Competition law as presently interpreted deals with financial disadvantage to consumers and this is not obvious when the users of these services don’t pay for them.The users of their services are not their customers.That would be the people who buy advertising from them—and Facebook and Google，the two virtual giants，dominate digital advertising to the disadvantage of all other media and entertainment companies.The product they’re selling is data，and we，the users，convert our lives to data for the benefit of the digital giants.Just as some ants farm the bugs called aphids for the honeydew they produce when they feed,so Google farms us for the data that our digital lives yield.Ants keep predatory insects away from where their aphids feed;Gmail keeps the spammers out of our inboxes.It doesn’t feel like a human or democratic relationship，even if both sides benefit.The ants analogy is used to illustrate_____A.a win-win business model between digital giantsB.a typical competition pattern among digital giantsC.the benefits provided for digital giants’customersD.the relationship between digital giants and their users
Text 3 The power and ambition of the giants of the digital economy is astonishing—Amazon has just announced the purchase of the upmarket grocery chain Whole Foods for$13.5bn，but two years ago Facebook paid even more than that to acquire the WhatsApp messaging service，which doesn’t have any physical product at all.What WhatsApp offered Facebook was an intricate and finely detailed web of its users’friendships and social lives.Facebook promised the European commission then that it would not link phone numbers to Facebook identities，but it broke the promise almost as soon as the deal went through.Even without knowing what was in the messages，the knowledge of who sent them and to whom was enormously revealing and still could be.What political journalist，what party whip，would not want to know the makeup of the WhatsApp groups in which Theresa May’s enemies are currently plotting?It may be that the value of Whole Foods to Amazon is not so much the 460 shops it owns,but the records of which customers have purchased what.Competition law appears to be the only way to address these imbalances of power.But it is clumsy.For one thing,it is very slow compared to the pace of change within the digital economy.By the time a problem has been addressed and remedied it may have vanished in the marketplace,to be replaced by new abuses of power.But there is a deeper conceptual problem,too.Competition law as presently interpreted deals with financial disadvantage to consumers and this is not obvious when the users of these services don’t pay for them.The users of their services are not their customers.That would be the people who buy advertising from them—and Facebook and Google，the two virtual giants，dominate digital advertising to the disadvantage of all other media and entertainment companies.The product they’re selling is data，and we，the users，convert our lives to data for the benefit of the digital giants.Just as some ants farm the bugs called aphids for the honeydew they produce when they feed,so Google farms us for the data that our digital lives yield.Ants keep predatory insects away from where their aphids feed;Gmail keeps the spammers out of our inboxes.It doesn’t feel like a human or democratic relationship，even if both sides benefit.According to Paragraph 1,Facebook acquired WhatsApp for its_____A.digital productsB.user informationC.physical assetsD.quality service
Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks？（）A、The three required steps in the analog to digital conversion are sampling，encoding，and compression.B、The three required steps in the analog to digital conversion are sampling，quantization，and compression.C、The three required steps in the analog to digital conversion are sampling，quantization，and encoding.D、The output of the sampling process is a pulse code modulation （PCM） signal.E、The output of the sampling process is a pulse amplitude modulation （PAM） signal.
Which of the following describes the roles of devices in a WAN?（）A、A CSU/DSU terminates a digital local loopB、A modem terminates a digital local loopC、A CSU/DSU terminates an analog local loopD、A modem terminates an analog local loopE、A router is commonly consideredaDTEdeviceF、A router is commonly considereda DCE device
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Which algorithm was the first to be found suitable for both digital signing and encryption？（）A、HMACB、RSAC、MD5D、SHA-1
Which three are Cisco architectures?（）A、collaborationB、digital mediaC、borderless networksD、cloud computingE、virtualizationF、consumerization
Which statement is true about the digital to analog conversion process？（）A、the two steps of digital to analog conversion are decompression and reconstruction of the analog signalB、the two steps of digital to analog conversion are decoding and filteringC、the two steps of digital to analog conversion are decompression and filtering of the analog signalD、the two steps of digital to analog conversion are quantization and decoding
Birthday attacks are used against which of the following？（）A、 digital signaturesB、 symmetric cipheringC、 hashalgoritmsD、 asymmetric cipheringE、 digital certificates
Which of the following is a benefit of NAS over SAN?（）A、Higher data integrityB、Lower cost of implementationC、Higher redundancyD、Increased performance
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
When comparing analog display inputs to digital display inputs, which of the following is anadvantage that digital has over analog?（）A、Allows for higher brightnessB、More crosstalkC、Sustains higher resolutionsD、Supports widescreen resolutions
Which technology/feature is designed to maximize the benefit of using SSD drives? （）A、Easy TierB、FlashCopyC、EncryptionD、Metro Mirror
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单选题Birthday attacks are used against which of the following？（）A digital signaturesB symmetric cipheringC hashalgoritmsD asymmetric cipheringE digital certificates
单选题Which statement is true about the digital to analog conversion process？（）Athe two steps of digital to analog conversion are decompression and reconstruction of the analog signalBthe two steps of digital to analog conversion are decoding and filteringCthe two steps of digital to analog conversion are decompression and filtering of the analog signalDthe two steps of digital to analog conversion are quantization and decoding
多选题Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks？（）AThe three required steps in the analog to digital conversion are sampling，encoding，and compression.BThe three required steps in the analog to digital conversion are sampling，quantization，and compression.CThe three required steps in the analog to digital conversion are sampling，quantization，and encoding.DThe output of the sampling process is a pulse code modulation （PCM） signal.EThe output of the sampling process is a pulse amplitude modulation （PAM） signal.
单选题Popular magazines are not appropriate in school libraries, because it is not benefiting students educationally.Ait is not benefiting studentsBit does not benefit studentsCthey are not benefiting studentsDthey do not benefit studentsEthey are not providing students benefits
单选题Which algorithm was the first to be found suitable for both digital signing and encryption？（）AHMACBRSACMD5DSHA-1
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.