因计算机硬件和软件环境的变化而修改软件的过程称为(52)。
An(75)service bus(ESB) acts as a shared messaging layer for connecting applications and other services throughout an enterprise computing infrastructure。
(74)is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains。
An(73)statement can perform. a calculation and store the result in a variable so that it can be used later。
(71), also called end-user program, includes database programs, spreadsheets, word processors etc。
As they access the corporate network, mobile and remote users inadvertently can infect the network with(72)and worms acquired from unprotected public networks。
(67)
(66)
(65)
计算机执行指令的过程是:在控制器的指挥下,把(12)的内容经过地址总线送入(13)的地址寄存器,按该地址读出指令,再经过(14)送入指令寄存器,经过(15)进行分析产生相应的操作控制信号送各执行部件。若执行的是非转移类指令,或虽为转移指令但条件不成立;则(12)的内容加1;若转移指令条件成立,则根据指令给出的寻址方式计算出地址送入(12)。若有中断发生,(12)中应送入(16)。
(64)
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