(1) 1998 years of the virus

This virus outbreak in June 1998 in Taiwan, is considered the most dangerous, one of the most destructive computer virus. Worldwide the $2000 80 million loss.  Read More…

(1) the destination unreachable message

Source host to a target address them, send data in the routing table if router can’t find to change the destination address and its path at this time for the purpose of data, the address is unreachable, the router to source host returns ICMP destination unreachable, notice the time away interest communication can’t succeed. Read More…

Internet history though short, but it can say is contemporary history one of the most important technology, to people’s life and work to bring earth-shaking changes. With the development of technology and network technology, the Internet has already familiar with the gradual integration of the human club will and each of us daily life. Read More…

As humans in the industrial age of any a progress of technology revolution, as is always the coin has its two sides. We enjoy the Internet in with the great benefits and, at the same time, facing the information explosion, and the impact of the impact on our influence is very deep, involve the far life level, also involves cultural level. Read More…

BBS exactly is what? In the university of electronic science and technology, for example, to address the BBS school http://www.bbs.uestc.edu.cn, have already registered is: the user with tens of thousands of people, plus not registered and are regularly meeting, the estimated total ramble more than 10 million users should. This ten million people are living in a small machine, all discussion section has 192, includes the students every aspect of life. Read More…

1.Advanced research program, or call the man only (total integration, is Eisenhower saw the Soviet union launched the world’s first man-made satellite launched after ordered. At first, the plan holds the most senior military research and development projects, particularly rebound way missile program and satellite program. However, in NASA took over after the strength of the space program, greatly weakened. The JiHuaZu trying to win new research project, so committed to research and development of long-term projects stomach military related to and several Read More…

Paul “balaam at Pennsylvania state university ^ registering for a computer science class when he knew his schedule has been missed the first class, but he did not worry. Anyway, the first class also didn’t speak much. The second class while he went, was telling the Boolean algebra, this is computer mathematical logic operations base in class. He remember old teacher before goes to the blackboard, wrote” 1 + 1 = 0 “formula. He Read More…

C2C (consumer – consumers)

, is consumer to consumer (C2C transactions mode. C2C e-commerce platform is provided for buyers and sellers is through an online transaction platform to make the seller can offer goods online auction, the buyer can choose goods of bidding. Its characteristic is similar to the real business world flea markets. Its components, in addition to include both parties outside, still include electronic trading platforms Read More…

Electronic commerce is mother usage in computer technology, network technology and telecommunications technology to realize the whole business (business > process of electronic melt, the digital and network. People are no longer face-to-face, looking at the truth, by goods paper medium documents (including cash) transactions, but through the network, through online wide variety of commodity information, perfect logistics distribution system and convenient safety fund settlement system for trading (business). Read More…

A firewall is a network equipment, or software system, which should have the base this function mainly include: right

[0 to access network data filtering; (the) management network access behavior; The door) to through a firewall network access records and storage; (3)) can detect the attack from outside the network and alarm; 0 some firewall has I? Address translation functions. According to the characteristics of realization of data filter firewall can be divided into three categories:,” Read More…