计算机水平考试-软件设计师分类模拟题计算机专业英语(二)
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MIDI enables people to use 1 computers and electronic musical instruments . There are actually three components to MIDI, the communications11 2 > H, theHardware Interface and a distribution 3 called HStandard MIDI FilesH . In thecontext of the WWW, the most interesting component is the 4 Format ? Inprinciple, MIDI files contain sequences of MIDI Protocol messages? However, when MIDI Protocol 5 are stored in MIDI files, the events are also time-stamped for playback in the proper sequence ? Music delivered by MIDI files is the most common use of MIDI today.1>A.personalB? electronicC? multimediaD. network2、A.deviceB? protocolC. networkD? controller3、A.formatB? textC? waveD. center4、A.VideoB? FaxmailC. GraphicD. Audio5、A.messagesB. packetsC. frameD? informationSpread spectrum simply means that data is sent in small pieces Over a number of the 6 frequencies available for use at any time in the specified range. Devices using 7 spread spectrum (DSSS) communicate by 8 each byte of data into several parts and sending them concurrently on different 9 . DSSS uses a lot of the available 10 z about 22 megahertz (MHz) .6、A. continuousB? highC ? lowD? discrete7、A. direct-sequenceB? discrete-?sequenceC? duplicate-sequenceD? dedicate-sequence8、A. splittingB ? combiningC ? packingD? compacting9、A. bitsB? frequenciesC < packetsDe messages10、A. rateB? velocityC? bandwidthD. period11 is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group.12 is an error detection code that most data communication networks use.13 is an interior gateway protocol that uses a distance vector algorithm to propagate routing information?14 is a transfer mode in which all types of information are organized into fixed form cells on an asynchronous or non-periodic basis over a range of media.15is anidentifier ofa web page.11>A.ICMPB? SMTPC. IGMPD. ARP12^A.4B/5BB? CRCC. Manchester CodeD. Huffman13、A.OSPFB. RIPC. RARPD? BGP14、A.ISDNB.X.25C. Frame RelayD. ATM15、A.HTTPB. URLC. HTMLD. TAGCodeNetworks can be interconnected by different devices . In the physical layer networks can be connected by 16 or hubs, which just move the bits from one network to an identical network? One layer up we find bridges and switches which operate at data link layer. They can accept 17 z examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process. In network layer, we have routers that can connect two networks ? If two networks have 18 network layer, the muter may be able to translate between the packer formats . In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message 19 . As an e 关键词： 计算机水平 考试 软件 设计师 分类 模拟 计算机专业 英语
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本文标题：计算机水平考试-软件设计师分类模拟题计算机专业英语(二)
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