Chapter 132 Three Books

When Matthew introduced the hacker to Lin Hong, his voice was low. When he said that Arthur was a hacker before, he also looked very mysterious, which made Lin Hong feel a little strange. However, he didn't ask this question, and it was not until something happened that he suddenly felt it.

Lin Hong knew nothing about the Internet at this moment, so Matthew taught him from the beginning.

Only then did Lin Hong know that the cable that connects some computers is called a network cable. They are connected by something called a switch to form a school local area network.

In this way, a data exchange channel is established between these computers. Through specific instructions and software, data can be exchanged to another computer through a network cable. For example, sending information and commands to the other party, Arthur's previous control of Lin Hong's computer was to take advantage of a system vulnerability of muscle ratio to obtain control permission. Through that vulnerability, he can set up a special channel, log in to the target computer, and send instructions and information, just like operating his own computer.

In addition, Lin Li has also come into contact with the concept of "ip address". Each networked computer is assigned an IP address, which is equivalent to the house number of the computer. Through this, you can find the corresponding computer and send data to it.

Arthur demonstrated to Lin Hong on the spot the whole process of how to find the computer turned on the local area network and send a message directly to the target computer.

After Lin Hong saw it, he immediately simulated the whole process of how the data moved in the hardware.

He asked Arthur for advice on his thoughts one by one, which made the other party a little overwhelmed in the end, because the questions he asked were too low-level, and Arthur himself had not yet touched that level.

In the end, Arthur had to tell Lin Hong that these things were too cumbersome and he had no time to take care of some details. When he went back, he went to his father's study and showed him a book about network protocols.

Arthur's father is a professor in the computer science department of the Massachusetts Institute of Technology. The bookshelves in his study are full of large books related to computers. Arthur began to use those books as toys when he was very young.

This is undoubtedly great news for Lin Hong.

He only knew that Orlando was a university teacher, but he didn't expect to be a professor in the Department of Computer Science. No wonder Arthur's computer technology is so powerful. It turned out that there was a family lineage.

Finally, Lin Hong asked another question about email.

"So, how do I send it? Can I use this computer directly by email?

Arthur shook his head: "This is the local area network. Except for research, I seldom send emails in the local area network. If you want to send an email to Washington or abroad, you must dial the Internet and then use the email software to send it. ,...

Under Lin Hong's question, Arthur then explained to him the concept of wide area network, that is, the Internet. At this time, Matthew, who has a lot of theoretical knowledge, also participated in it. He explained the development history of the whole network to Lin Hong in detail.

The Internet began in 1969. On the basis of arpanet, the U.S. military connected the main computers of many universities across the country to share information and provide communication functions. Later, major U.S. agencies gradually began to join the network. By the first year, the U.S. Department of Defense divided the Apache network into military network and civilian network, and more companies joined. The network gradually expanded. Finally, European governments also began to sign agreements and joined the network one after another, and finally became today's mutual. Networking.

At the same time, Arthur also told Lin Hong that his home had been connected to the Internet and then showed it to him.

Lin Hong has gained a lot this afternoon. Now he finally has a clearer understanding of computer concurrency. Although he hasn't figured out many details, he is not blind as before.

In essence, the network is also a kind of sending and receiving of data signals. Compared with radio signals, Lin Hong thinks that the two are similar. However, compared with radio signals, the network data transmission of computers is more complex and more controllable.

Radio stations around the world have formed a huge network all over the world, but this network is extremely loose and uncontrollable. The transmission efficiency of the signal is very low, and it is only possible to establish a connection when both parties are online at the same time, which is an immediate connection.

The computer network is different. As long as it is turned on, people can receive information when they are not nearby, and then process it. Most importantly, the computer can run software, which is the most fascinating thing.

Software is like the soul of a computer, and a computer without software is like a tape recorder without tape, which is a pile of scrap iron. It is because of the existence of software that computers have infinite charm, so that human wisdom can be derived and expanded to another world.

However, if it is just an independent computer, its functions are limited and its impact on society is limited. But if many computers can be connected to form a network, it is equivalent to connecting the "wisdom" of many people together, thus generating immeasurable power.

This should be an important reason why the U.S. government initially connected the computers of universities and research institutions across the country.

Hiddenly, Lin Hong feels that the computer network will become a powerful force to promote social development in the future.

They stayed in the computer room until four o'clock in the afternoon before coming out of it.

Matthew has been playing games while evaluating the game, saying that it's not good here and it's not scientific there. If he designs it himself, what should he do? Lin Hong can see that he is an ashes-level game player, because Lin Hong thinks it makes sense because of his many suggestions.

From beginning to end, Arthur has tried his best to answer all the questions raised by Lin Hong. If it involves the historical origin, please ask Matthew to come forward, which is Matthew's strength. For others he could not answer, he promised to help find relevant materials and books when he went back.

The Jiyu family is not far from the Latin school, and Lin Hong and Arthur walked home.

In the United States, the principle of going to school is close. Where you live, you must go to a local school. It is not possible to go to school across regions. If you think the local school is not good and want to come to the Latin school, then please relocate and move to the school district of the Latin school, otherwise the school will not allow you to transfer.

As soon as he arrived at home, the big dog bingo at home greeted him enthusiastically. Arthur immediately squatted down and made out with him for a while. Originally, Arthur wanted to introduce Lin Hong to Bingo, but he found that Bingo seemed to be very afraid of Lin Hong. Although he no longer ran away with his tail like the first time he saw him, he was unwilling to get close to him.

Lin Hong also felt helpless about this situation. He seemed to have become a pet nemesis. Any pet he met on the road, as if he had seen a jackal, a tiger and a cat, ran away one after another. Several of them were led by their owners, and even almost tripped their owners to the ground.

"It's good that Ah Huang still thinks like that before, and he is not afraid of me." Lin Hong thought.

After going back this time, he and Huang reunited. It can be seen that he was very happy. Unfortunately, his stay was too short to bring it out. Later, Lin Hong fostered Ah Huang in his master's house, so that he always had nothing to eat and was hungry.

In the yard, several staff in green uniforms are helping to level the grass and put the grass back on. Vina looked around and gave some suggestions for improvement from time to time.

"Children, you are finally willing to go home.,, Vina saw them from afar and shouted.

"We went to the school computer room for a few hours after school." Lin Hong stopped to explain.

And Arthur went straight into his room with his schoolbag on his back.

Vina smiled and said, "You don't have to report your whereabouts to me. That's your [from] reason." At this time, the work of the lawn repair staff had been completed, and one of them came over with an agreement to let Vina accept it. Vina signed her name on it again and thanked her.

Lin Hong saw that the lawn in front of the door had been completely restored, and he could not see that it had been destroyed at all.

Shortly after Lin Hong returned to his room, Arthur knocked on his door.

The door was not closed, but Arthur did not come in directly. After Lin Hong's permission, he came in with a few large books.

"These three books contain all the [answers] cases of your questions today. I have folded up the important places. Take a look at it yourself. If there is anything you don't understand, you can ask me at any time." Lin Hong took the three books in his hand and first took a general look at the well surface one by one.

The background of the cover of the first book is black. On the black cover, there are some green words embellished with some names, such as Bob Albright, Bill... Gates, Steve Jobs, Woznia...,

In the part of the cover, a huge white word is printed into his eyes "Hacker" 1

Under this word, there is a line of small words: the hero of computer [revolution] life.

Lin Hong couldn't help turning over a page immediately and quickly browsed the frontier and catalogue parts. A rather shocking feeling rose from the bottom of his heart.

This is actually a book dedicated to hackers! From the 1950s to the 1980s, it traces the tradition and history of hackers and describes the lives and stories of many famous hackers!

There is no doubt that this "Hacker: The Hero of Computer [Revolution]" is exactly the book he wants to read!

The second and third books are manuals on technical aspects, namely Introduction to tcp/ip Protocol and Computer Structure: Principles and Examples, all of which are in English.

"Thank you!" Lin Hong solemnly thanked him, completely from the bottom of his heart.

"Don't forget our deal." After saying such a sentence, Arthur went out.