Chapter 368 The reason why I keep using it
After breakfast, Ying Zheng and his group went to find Qin An again. And Qin An went out early in the morning, and they missed again.
Ying Zheng frowned slightly and said, "What did Qin An do again?"
Jiang Lu immediately said: "I will go find him now."
Ying Zheng nodded.
Jiang Lu left the yard immediately.
Ying Zheng looked at the empty courtyard and could only enter Qin An's study again and sit in the courtyard reading with Qin An's books.
Li Si and Feng Quji could only stand aside and wait for Qin An.
After waiting for a while, Li Si said: "Village chief, why not go find people from the Mo family and Gongshu family now to learn about the pros and cons of transmitters and telephones, and ask some things about them by the way."
Ying Zheng nodded and said, "That's fine."
Immediately, Li Si arranged for two Black Dragon Guards to go find people from the Mo family and Gongshujia.
To find Qin An, we need to find Lu. But the people from the Mo family and the Gongshu family only need to be found by the Black Dragon Guard.
The most important thing is that Qin An is not easy to find, but people from the Gongshu family and the Mo family are easy to find.
As expected, people from the Mo family and Gongshu family came to the courtyard first.
"See the village chief."
Ying Zheng nodded and said: "No need to be polite, just tell me what is the difference between a telephone and a telegraph. Can you use a telephone instead of a telegraph?"
The Mohist disciple was the first to answer: "Reporting to the village chief, sir, although the telegraph appeared earlier than the telephone, and even telephones have become popular all over the world, the telegraph is still not discontinued."
"Do you know why?" Ying Zheng asked.
"This gentleman didn't say anything. He said that this is not something we should care about. Our task is to learn the theory and then constantly update the telephone and telegraph.
However, according to my husband's opinion, he doesn't seem to have much hope for this. He always says that these will be eliminated in two years.
When the time comes, buy us mobile phones and computers so that we can have access to more knowledge. "The Mohist disciple said again.
Ying Zheng nodded slightly and said, "Since you don't know much, go back. Next time you have such an opportunity, you can ask Qin An directly."
"promise."
After the Gongshu disciples and the Mohist disciples left, Li Si spoke again: "Village chief, it seems that Qin An still hasn't given up yet."
Ying Zheng nodded and said: "I will naturally give up after two years. The most urgent task is to discuss the pros and cons of telegraph machines and telephones.
You just heard that even though telephones have become popular all over the world, telegraphs still exist.
So this incident can only tell us that this telegraph machine may no longer be popular among the people. In this case, it can only mean that the country is still using telegraph machines, but why does the country use it?
Where is it used? I still can't figure this out, where do you think it will be used? "
"Village chief, do you think it will be used in the army?" Feng Quji said.
"Army?" Ying Zheng and Li Si both frowned slightly.
How can such a thing be used in the military if it requires wire connection?
Just when everyone was making random guesses, Qin An came back, and Jiang Lu came back with Qin An. The two came back talking and laughing.
"Father-in-law, father-in-law." Qin An bowed to them, "My third uncle told me on the way.
You now want to know the advantages and disadvantages of telegraphs and telephones, and you want to know what is best to install. "
Ying Zheng said: "Now that you know everything, tell us what are the advantages and disadvantages of this telephone and telegraph.
Why do we need a telegraph when we already have a telephone? Don't you think it's unnecessary? "
Qin An smiled and said: "It's normal for you to have such thoughts, because the advantages and disadvantages of the two are very obvious. You can talk directly to the other party by dialing the phone number. There is no need to remember so many complicated passwords.
Mouth-to-mouth talking is so simple, so people and countries all choose to use telephones. "
"Then we will develop telephones." Ying Zheng said.
However, as soon as he finished speaking, he realized something was wrong and quickly asked: "No, since everyone uses telephones, why did you invent the telegraph?"
Qin An said helplessly: "We are lacking resources, whether it is phone calls or telegrams, we need some.
After the telegraph was invented, it was used for a period of time and then was no longer used. To be precise, it was no longer used by the people. What the people used was the telephone. "
"Then who is still using it?" Ying Zheng asked.
"The military," Ying Zheng said, "as well as the National Security Agency and so on, it was because this telegram required a password that it was discovered. Without knowing the password, it would be difficult to decipher it.
In this way, when messages are sent between armies, the enemy will not be able to get the message immediately.
You also know that timing is very important for marching and fighting. After we intercept the enemy's intelligence, we will make arrangements as soon as possible and wait until the opponent enters our encirclement.
But what a terrible thing it is when we intercept the other party's information and find that we cannot know the other party's password and do not understand the other party's intentions at all.
The opposite is also true. Even if the enemy gets our telegram, without the code book, the telegram is equivalent to a piece of waste paper.
Even if someone can translate it, I'm afraid it will take a day or two. One or two days is enough for us to do anything. "
"I understand. I understand." Ying Zheng said excitedly, "This telegraph machine is very suitable for use in the army.
No matter when we arrive, the enemy will likely get our telegram. But they couldn't translate it, so the telegram was of no use.
Good stuff, really good stuff. No wonder the telegraph is so troublesome and still exists. "
Qin An smiled, nodded and said: "Yes, a codebook is very important. The more complicated the codebook, the more headache it will cause people. The simpler it is, the easier it will be to crack.
After the advent of the telegraph, there were two very important professions, telegraphers and translators.
A telegraph operator is a person who sends and receives telegrams, and a translator is a person who translates telegrams. "
"Cultivation must be done well." Ying Zheng said, "Such talents must be cultivated."
Qin An sighed and said: "This is not easy to cultivate. Generally speaking, whether they are transmitters, receivers or translators, people with certain specialties will be protected by the state.
There was once a blind man who could hear very subtle sounds, sounds that ordinary people could not hear, such as the sound of wind, rain, and even human breathing.
He can also hear the footsteps of others in the noisy streets and thus learn about his captor.
Just like this, a blind man escaped a dozen people who were chasing him on the noisy street. "
"Why should we arrest this blind man?" Ying Zheng asked, "Who are they? Who is the blind man?"
Some people died, but not completely...
