专题复习简答41题（Special review answer 41 questions）.doc

专题复习简答41题（Special review answer 41 questions） (five) 1. what is the principle of store and forward? If a user wants to communicate with the user B, users only need a connected switch switch connected, the first user to send a packet of information is received and stored and then determine the information transmission route according to the grouping information provided by users within B address, until the routing is idle, in turn the packet switch after the transmission of information to the user, and finally to the B. 2. what are the basic steps for computer information retrieval? Identifying retrieval requirements; Making retrieval strategy; Join retrieval system (or carry on machine check); Evaluate retrieval results; 3. what are the environment and conditions required for the effective operation of public security information activities and facilities? I. perfect rules and regulations, policies, laws, and unified and standard information processing standards; A large number of officers in the police force will be able to use and make good use of information systems to work; Support the operation of the public security information infrastructure, research and development, and a rational team of qualified personnel. 4. what is the basic goal of computer information system security protection? Guaranteeing the information security of the national economic infrastructure; The threat of information warfare against hostile forces; Safeguarding national security and social stability; Against information technology crime at home and abroad; Ensuring coordinated, sustained, high-speed and healthy development of the national economy. 5., what is information technology? We should adopt modern information technology in all sectors of the national economy and social activities so as to fully and effectively give and utilize various information resources. The community and the public at all times and places, through a variety of information media (sound, text, maps), enjoy an