In the large public classroom in the comprehensive building of the computer department, it is noisy, the information security course is an elective course, the course is not as esoteric and difficult to understand as other computer courses, and it is easy to get points, so there are many people who participate, and the large classroom of 300 people is full at the moment, but just now the head of the department said that the teacher is sick, and there will be a new teacher in this class.

As soon as the head of the department left, the classroom was in a commotion.

"Dude, haven't you seen it, freshman?"

"No, it's a senior."

"Uh, rebuild?"

"No, I'm from the physics department."

"You also want to take this course in the physics department?"

"No, I got the news that the head of our department will raid the dormitory today, and yesterday I played all night, and I came here to sleep."

“……”

"Huh! This is your computer science teacher? ”

"Damn, it can't be, right?! God has opened my eyes......"

At this time, a tall figure walked in, and suddenly the whole classroom became quiet and solemn, and everyone's eyes fell on this strange woman.

I saw that she had short hair as bright as brocade, bronzed skin, a pair of black-framed glasses, which could not hide the sharpness of her eyes, and a set of beige slim shirts on her upper body, the close-fitting material perfectly exposed her slender figure, a pair of casual cropped pants and a pair of white flat shoes.

"Papa......" The students couldn't control their excitement and applauded one after another, their eyes revealing the brilliance of excitement.

Ye Zifei paused, took two steps back, and looked at the vague door number above the door-computer department, only to realize that he had gone to the wrong classroom!

She stroked the long hair around her ears to hide the embarrassment at the moment, and when she looked sideways, she saw that the students in the entire classroom were looking at her expectantly, and she felt a little inexplicable.

I don't know who shouted: "Stand up!" ”

Most of the more than 300 students stood up and shouted in unison, "Hello teacher! ”

After graduating from high school, there is no such process in college, no way, who calls the majority of male students in the computer department, it is rare to meet such a goddess teacher, and he is not stammering to keep it.

Ye Zifei is not very old, but he has been running around for the past year, and his temperament is much more mature than his peers.

This morning, she was forced by several roommates to dress up, she deliberately delayed not leaving, and after her roommates left, she wiped off all the sticky makeup on her face, changed into a set of comfortable clothes, and then went out.

Along the way, I asked my classmates for directions, but I didn't expect to go to the wrong classroom.

When the students all sat down, Ye Zifei stood at the door and looked at the expectant eyes below, she suddenly had the idea of prank, coughed lightly, walked to the podium, put the English textbook in her hand on the table, smiled at the corner of her mouth, looked around, and said in a low voice: "Today...... Cough...... I'm going to take this lesson, so where did you talk about the last lesson? "Denial-of-service attack ......"

Ye Zifei looked up and saw a familiar face, looking at him with a smile. 'Ghost wolf' Xuan Yu, just based on his technical needs, came to university for further study?

Ye Zifei glanced at the English textbook on the podium, and began to organize the language in her mind, she knew a lot about computers, of course, she couldn't compare with those people in the Dark Alliance, but her biggest advantage was that her memory was very good.

"Denial-of-service attack...... The denial-of-service attack is Denialofservie, or DOS for short, which is a common hacking method, sending packet requests with false source addresses, using network servers to flood a large number of messages waiting for a reply, consuming network bandwidth and system resources, overloading the entire network or system, resulting in paralysis and stopping normal services......"

Ye Zifei's voice is low and full of unique charm, and the explanation is like a chant of poetry, with rhyme, even if it is a boring noun, it flows out of her mouth naturally, even if the students who don't understand computers at all, they can't help but cheer up and listen carefully.

"What I'm going to say is that this behavior is like ...... Littering eggs in undisciplined ......"

There was a chuckle from the students below......

"Stuff the network with a bunch of rotten egg packets, then the good eggs will stink, and then the whole server will really become a stinky trash can......"

Some students opened the textbook and couldn't help but say, "Teacher, what you said is different from the textbook!" ”

"Don't worry about the textbook, the things in the textbook are too theoretical, what I teach you is what can be used in practice, you can tear this page off, throw it in the trash, be careful not to mix it with rotten eggs......"

"Okay, sometimes, in order to improve the efficiency of smashing eggs, I will unite some people who are also undisciplined, and throw eggs together, so that I don't know who threw the eggs, and I don't know if the eggs are good or bad, and it's more difficult to prevent, a great god said, you can not lose me, but you can't stop me from losing you, that is, the Internet festival is unreliable, unless you go offline, this is what I want to say about rotten egg theory......"

"If you also want to throw rotten eggs, then pay attention to the following points, first, pay attention to pee first when throwing eggs, because you can't walk away at a critical moment......"

There was a cheerful laughter below, and this point was deeply experienced by Ye Zifei in his previous life, so he would remember it vividly.

“…… Second, the eggs you prepare must have been processed, that is, to set a dead loop, which can not only hide yourself, but also improve the plugging effect, and third, ......"

The students below were all interested, and they looked intently at the goddess teacher on the podium, paying attention not only to her beauty, but also to her humor and easy-to-understand theoretical knowledge.

"How do you prevent someone else's rotten eggs? That's what this class is about, the first packet identification system is to screen out rotten eggs with fuer, and the second is to remodel your trash can, generally using SRF ports and ESQ ports......"

The people below began to listen to it as a joke, and then the notes in the classroom were rustling, for fear of missing a little thing, Ye Zifei's explanation was very detailed, involving a wide range, involving a lot of other computer courses, even if I didn't understand other classes before, under Ye Zifei's impatient explanation, they all woke up, it turned out to be so simple.

When it came to the wonderful, everyone couldn't help but applaud......

I don't know when it started, a middle-aged man at the door of the classroom stood quietly at the door, with a smile on the corner of his mouth, and an appreciative look in his eyes.

Ye Zifei was suddenly startled, his eyes drifted, knowing that he was exposed, he hurriedly picked up the textbook on the podium, bowed to the middle-aged man, said no more nonsense, and ran out of the classroom at once, running away like a frightened mouse.

The middle-aged man couldn't stop her, and the students stood up one after another, and they couldn't figure out what the situation was.

The middle-aged man scratched his head helplessly, walked to the podium, looked at the content on the blackboard, and fell into deep thought, he has taken so many computer classes, and he has never been as popular as this girl, what is wrong with him?

He put down the handouts, propped his hands on the table, looked at the same confused students below, and said with a smile: "I'm sorry, I'm the substitute teacher for this class, because of the short notice, so I was late, what grade was that girl just now?" ”

There was an uproar below, what was she just a student?

No one could answer his question, and everyone's face showed an unconcealable disappointment, and the goddess teacher turned into a rough uncle......

Xuan Yu showed a smile, looked at Ye Zifei running downstairs lightly, and said softly: "It's a little interesting......