There are many strange rules in the class.

For example, girls in the latter 20% of grades have priority answers.

For example, girls with poor grades will organize special assistance groups to provide key assistance.

Liu Cheng came to study at school and never participated in such messy things, but now that the class monitor asked, he naturally had to express his own point of view.

"Ah, that's it. Why?" Wang Shouzhong asked with confusion: "But other classes and other departments in the hospital do this. If we don't do this, only these three girls in the class will be abducted?"

Liu Cheng blinked, has this era of college students fallen into this state?

He took a deep breath and asked, "Did the teacher of the Youth League Committee agree?"

"The teachers of the Youth League Committee did not agree, but the teachers of the Youth League Committee did not object." Wang Shouzhong said ambiguously.

Liu Cheng smacked his lips and shook his head and said, "I don't care. I just expressed my own opinions as a student. I will not participate in this matter."

Student unions are all guided by the Youth League Committee, and students manage their own mass organizations.

The primary premise is the guidance of the Youth League Committee. Since the Youth League Committee teacher doesn’t object, his objection is useless.

Be yourself well.

Changing others is always a thankless thing.

Ma Shaoguang walked into the classroom, and Wang Shouzhong quickly went up to help check the projector's cable.

Ma Shaoguang started to call out the list with the roster, and the classroom gradually became quiet.

He was very satisfied and closed the roster. Although Qingze's school has been promoting the need to access the check-in system for facial recognition classes, the wave of opposition is loud.

Ma Shaoguang is the first author of this core algorithm of technology. He voted against it at the school committee.

This technology is of no use except intensifying the conflict between students and schools. For example, now, no one is absent from the first class of the holiday.

He adjusted his projection and said with a smile: "I left a few questions in the last class, so now I will start asking questions. Those who are willing to answer can raise their hands on their own."

"The first question, who can briefly explain the vulnerability of network security?"

"Chen Bing, please answer." Ma Shaoguang called the top scholar of the first school.

Chen Bing is the top student after Liu Cheng, and this one is second only to him, which makes Chen Bingru stuck in his throat.

Chen Bing took a long breath and said seriously: "The Internet is essentially packet switching. Compared with telecommunications networks that use circuit switching, they are more vulnerable to attacks."

"When all user resources are shared, one user will inevitably be affected by other users; routers have decentralized decisions and traffic disorder, etc., which are all caused by packet exchange."

"The Internet does not have any authentication mechanism, and any terminal can access it, which leads to serious IP fraud."

"And the Internet's service strategy is to do its best, under this strategy..."

Chen Bing spoke very quickly, and many students had already started to take notes. Ma Shao nodded constantly. After Chen Bing finished his answer, he said with satisfaction: "What Chen Bing wants to say is actually what I want to say, and the summary is very comprehensive."

"Everyone applauds and encourages you."

After Ma Shaoguang finished speaking, he showed his PPT. The answer he prepared was almost exactly the same as Chen Bing's answer.

"Smack!"

There was a lot of applause in class and there was a little discussion.

Liu Cheng also applauded, and he agreed with Chen Bing's answer, comprehensively explaining the fragility of the Internet.

Therefore, network security is necessary.

When Chen Bing sat down, he looked at Liu Cheng who was applauding, with a provocative look in his eyes.

Liu Cheng was a little confused. Did he offend him when did he offend him?

Ma Shaoguang continued to ask: "The second question is, who will briefly describe the methods of cyber attacks?"

"Han Zeyu, say."

Han Zeyu stood up and said loudly: "The classification method based on empirical terms, that is, according to commonly recognized names, is the current mainstream classification method."

"Cyber ​​attack methods include and are not limited to: malicious code (viruses, worms, Trojans, etc.), denial of service, unauthorized copying of data, intrusion, software piracy, hidden channels, session interception, harpoon attacks, puddle attacks, IP spoofing, password eavesdropping and cracking, overright access, reconnaissance, scanning, monitoring, logic bombs, trap door attacks, electromagnetic leakage, service interference, overflow attacks, SQL injection, XSS attacks, social engineering attacks, etc."

He said so many nouns in one breath, which were all means of cyber attacks. After saying that, he looked at Liu Cheng constantly blinking, but unlike Chen Bing's eyes, he was looking for recognition.

Liu Cheng nodded, "Young man, you can do it." While you are in love, your studies have not been pulled down."

Han Zeyu was relieved after receiving Liu Cheng's affirmation.

Ma Shaoguang clicked the computer again and said, "It's very good, it's a little more comprehensive than my summary, and the preparation is very solid."

"Everyone applauds and encourages you."

The applause sounded again, and most of the students were writing quickly at the white screen of the projector and taking notes. The whole classroom was filled with the sound of rustling pen tips passing through the paper.

When Ma Shaoguang and most of the students raised their heads, they continued to ask: "The third question is, when cyber attacks rise to the level of cyber warfare and cyber attacks evolve into cyber warfare, what aspects are they divided into?"

No one answered, all the students looked at me, I looked at you, this concept of online combat is the latest concept that emerged in 2008, and there is no information on the Internet.

"Is there no one?" Ma Shaoguang asked with a little disappointment. He hoped that his classmates would understand that the fragility of the Internet has caused frequent Internet attacks.

This large-scale cyber attack will eventually change from quantitative to qualitative change, from cyber attack to cyber combat.

He hopes that the students can understand, but unfortunately, no one in the class can answer this question.

Liu Cheng looked left and right, and raised his hand.

Ma Shaoguang's eyes finally lit up and he stretched out his hand and said, "Liu Cheng, please answer."

"Computer Network Operations, ComputerNetworkOperations, abbreviated as CNO, is mainly divided into three aspects."

"The first aspect, computer network attacks (CNAs) refer to the act of disrupting, denying, degrading functions or performance through computer networks, damaging information within computers and computer networks, or computers themselves."

"The second aspect is the use of computer network information (CNE), the behavior of collecting information from the target information system or network and utilizing it."

"That is what everyone often says, if you don't go online, if you go online, you don't go online, otherwise you will be 500,000 people walking."

After Liu Cheng finished speaking, the students in the class covered their mouths and chuckled.

The walking 500,000 refers to the price of reporting for cyber spies, with the highest bonus of 500,000.

"The third aspect, Computer Network Defense (CND), refers to the use of computer network analysis, detection, monitoring and blocking attacks, intrusions, disruptions, and unauthorized access to the network, is a defense behavior."

"If CNA is a spear, then CND is a shield."

Ma Shaoguang's eyes became brighter and brighter. After Liu Cheng finished speaking, he couldn't help but applaud and said, "Very good!"

He showed his answers. These three questions were more difficult than the other, especially the third question. He thought he needed to sort them out by himself, but Liu Cheng's sorting out was very comprehensive.

And some metaphors were made to make it easier for students to understand.

Liu Cheng was ready to sit down with a smile, and the finale was always the last one to appear. It was drizzling, and he was still very confident in his professional field.

Chen Bing suddenly stood up and asked, "What do you think of the national firewall?"

Liu Cheng tilted his head and looked at Chen Bing, showing a cruel smile. Are you waiting for me here?

Don’t you know that my sister is the gold medalist in the 100-school debate competition?!

For computer network operations at the national level, a defense system must be arranged. Since Liu Cheng mentioned CND, an extremely important project of computer network defense is the national firewall mentioned by Chen Bing, which is easier to understand, which is 404.

He smiled and said, "What do you think? Do you think the firewall is good or bad?"

Please start your performance!

Chen Bing glanced at Ma Shaoguang. He had been patient with the word second only to two for too long.

Ma Shaoguang picked up his enamel teapot and said with a smile: "In class, it is to express his own opinions."

Chen Bing stared at Liu Cheng and said seriously: "This kind of firewall that separates our Internet from an international island should certainly not exist."

"It seriously violates the open spirit of the Internet! It seriously hinders friendly communication between us and the international community! In the end, it will only shoot ourselves in the foot and stop our progress!"

Harm, this era of monsters and monsters rampant.

International islands and the spirit of open Internet will inevitably pay the price in the end. The logic behind this set of rhetoric is rigorous and there is no place to refute it at all.

The national firewall of the Internet has been criticized continuously.

The proposer and founder, Academician Fang Bingxing, the principal of Beijing Post University, went to Wuhan University to give a speech to graduates, but was thrown rotten eggs by students below. The first time it was not hit, and the second time someone started throwing shoes.

The shoe hit the academician.

Not long afterwards, Academician Fang Bingxing resigned from the position of president of Beijing Postal University.

A national scholar, an academician of the Academy of Engineering, who defends national security, was treated like this.

Liu Cheng didn't plan to change anything. Before the Prism Gate was completely exposed, in the face of basic facts, he seemed pale and powerless.

"You are right." Liu Cheng sat down and did not refute.

Chen Bing's face was full of pride, as if he had achieved a major victory.

The class suddenly started to talk. Liu Cheng was never a bun, but this time it was rare that he did not draw his sword to face each other, so they naturally talked about it.

"Brother Cheng, something is wrong with you! Where is your aura?!" Han Zeyu asked anxiously when he saw that Liu Cheng actually gave up on the debate.

Liu Cheng shook his head, mainly because he didn't want to discuss this issue.

Ma Shaoguang was watching the debate with great enthusiasm, but Liu Cheng ended the debate with just saying you are right.

He couldn't understand this young man. When facing the provocation, he clearly had a lot of words to say, but he ended with one sentence: You are right.

In fact, you are right in Liu Cheng's sentence: people who are not in harmony and do not seek mutual conspiracy, discuss this topic.

This kind of discussion is meaningless because Chen Bing's butt is sitting tightly on the other end.

"Didn't you want to say? In class, boldly express your opinions." Ma Shaoguang picked up his enamel teacup and asked with a smile.
Chapter completed!