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● An embedded operating system is the（71） program that manages all the other programs in an embedded device after initial load of programs by a(an) （72）. It normally guarantees a certain capability within a specified（73） size and （74） constraint as well as with application programs. It also normally has small foot print including initial boot loader, OS kernel, required device drivers, （75） for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.
（71）A. hardware B. business C. software D. external
（72）A. driver B. application C. kernel D. boot loader
（73）A. data B. storage C. bus D. CPU
（74）A. time B. format C. controller D. packet
（75）A. JAFFS B. format C. file systems D. protocol
参考答案
更多 “ ● An embedded operating system is the（71） program that manages all the other programs in an embedded device after initial load of programs by a(an) （72）. It normally guarantees a certain capability within a specified（73） size and （74） constraint as well as with application programs. It also normally has small foot print including initial boot loader, OS kernel, required device drivers, （75） for the user data and so forth. It has very-likely structure of a normal operating system however mainly differentiated by some factors such as type of pre-installed device, functional limits, taking designed job only.（71）A. hardware B. business C. software D. external（72）A. driver B. application C. kernel D. boot loader（73）A. data B. storage C. bus D. CPU（74）A. time B. format C. controller D. packet（75）A. JAFFS B. format C. file systems D. protocol ” 相关考题
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● A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication; TCP uses port （71） to accomplish this. Another responsibility of a transport layer protocol is to create a （72） and error-control mechanism at the transport level. TCP uses a sliding （73） protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve （74） control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends （75） of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.（71）A. numbersB. connectionsC. diagramsD. resources（72）A. procedureB. functionC. routeD. flow（73）A. pathB. windowC. frameD. diagram（74）A. packetB. timeC. errorD. phase（75）A. portsB. streamsC. packetsD. cells
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A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication; TCP uses port (71) to accomplish this. Another responsibility of a transport layer protocol is to create a (72) and error-control mechanism at the transport level. TCP uses a sliding (73) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve (74) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends (75) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.（71）A．numbersB．connectionsC．diagramsD．resources
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