Su Huangyong's Fifth week reading report

The world is digital.

The Power of communication

The world's most important long-distance communication is unknown how many years before the marathon battle, the Athens Army won the battle, sent a good-running soldiers pheidippides from the marathon good news to 42 kilometers away from Athens. The soldier ran back to Athens with all his strength and said, "Celebrate, we win!" "And then I fell down and woke up. Fortunately, the speed of communication now is not the speed of the marathon that year. At the moment, information travels at the speed of light, and people around the world can quickly know what's happening around the world.

Telephone network is the earliest use of human communication network. Telephone is a person used to transmit voice information, even if speed up, it is not as fast as a computer, this is the technical limitations of the telephone itself. When the Internet technology came up, the telephone network soon fell into a secondary communication network. There is no way, the Internet can quickly transfer a lot of information, but the telephone network does not work.

Popular science books, who had read the internet before, knew the internet was the product of the cold War between the United States and Soviet Union. Americans fear that the Soviet missile broke the storage of important information on the computer, the thought of using a network cable to connect the data of multiple computers, when a computer in the network was broken, and several other computers can still be used to retain the important data. People who have learned physics know that in a conductor, the speed of the current is the speed of light, so that the rate of information transmission is so fast that the information can be updated faster. But this fast speed of communication network still has its limitations-the length of the network cable affects the flexibility of the computer, after all, the computer can carry around, but the length of the network cable can not be arbitrarily stretched. As a result, people who are thinking about progress (lazy) have found another convenient (lazy) network.

With the wireless network, a variety of computers can receive radio signals can be in a variety of signal base station signal coverage under the communication, this lazy human finally can comfortably surf the internet!

But, the big bad guy is lurking in the communication network to calculate the big things ...

Su Huangyong's Fifth week reading report