數(shù)據(jù)庫(kù)系統(tǒng)工程師模擬題及答案(編輯修改稿)
2024-07-23 21:06 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 0 E．1010111011001 F．1010110001100 (64)A．1010110111111 B．1010111010001 C．1010110001101 D．1010111101010 E．1010111011001 F．1010110001100 (65)A．1010110111111 B．1010111010001 C．1010110001101 D．1010111101010 E．1010111011001 F．1010110001100 ●Typically,these are concerm with the establishment of ＿(66)＿ the network and with the control of the flow of messages across this channel. The provision of such facilities is only part of the network requirements,however,since in many applications the municating puters may be of different types. This means that they may use different programming languages and,more importantly,different forms of ＿(67)＿ interface between user(application) prograrma，normally referred to,as application processes or APs,and the underlying munication services may be ＿(68)＿ For example，one puter may be a smaall single user puter,while another may be alarge ＿(69)＿ the earlier days of puter munication,these issues meant that only closed munities of puters(that is,from the same manufacturer) could municate with each other in a meaningful way. IBM39。s Systems NetworkArchitecture(SNA) and DEC39。s Digital Network Architecture (DNA) are just two examples of munication software packages produced by manufacturers to allow their systems to be int ercormected proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. In an attempt to alleviate this problem,＿(70)＿,in the late 1970s,formulated a reference model to provide a mon basis (or the coordination of standards developments and to allow existing and evolving standards acivities to be placed into perspective with one another. (66)A．munication channel access B．protocols C．datachanneI D．public munieation (67)A．database B．data representation C．protocols D．data munication (68)A．same B．similar C．different D．dependent (69)A．multiuser B．client C．server D．fulluser (70)A．DNA B．SNA C．the OSI D．the ISO ●One of the functions of the ＿(71)＿ is to store the applications progrms {or the various secondaries. The ＿(72)＿ may have similar or dissimilar functions. The same control code received from two different secondaries may warrant two different actions on the part of the host puter. If the system so requires,the host puter must also provide ＿(73)＿ for the centralized data and the software for database management. Data information is normally stored in auxiliary memories to which the puter has ready access. The＿(74)＿ peripherals connected to the host puter allow for human entry and intervention. As needs change, application programs may require additions, deletions, or changes. Data link problems also arise which are __(75)＿ the range of the puter39。s programmed capabilities. In such cases, human entry is required to make the necessary changes to resolve the existing problems. (71)A．peripherals B．host puter C．the interface D．the client
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