The reality is that the entire earth has tens of millions of cities and a population of seven billion.
There is only one city here, and including the suburbs, there are not even 700,000 people there.
In reality, there are so many cities and the population is so dense that on November 26, 2020, that is, a month and a half ago, all 4.3 billion IPv4 addresses have been allocated, and there are no more addresses that can be allocated to ISPs and other large network facilities.
Discussed.
As for this city in the game, Ye Han had observed it before. There were tens of thousands of IP addresses in total, and the last two digits of v4 were not used enough.
Of course, a city shouldn't have so few access points, but this is a game.
Moreover, it is not uncommon for dozens or even hundreds of terminals with one IP address to access the Internet at the same time. There are many methods for internal networking such as company Internet cafes, or time-sharing leasing and rotation by service providers.
Otherwise, in reality, when computers, mobile phones, tablets, TVs, cars and even refrigerators, air conditioners, washing machines, and water heaters are all connected to the Internet, how can the IPv4 address persist until 9102?
The difference between ipv4 using two digits and using four digits is like...
One city and the whole world!
The target may be anywhere in the world. In terms of space, if someone hacks you in Buda, Congo, even Americans, if they are not acting in movies, will find it difficult to knock on your door in a short time.
In terms of probability, the probability of winning the jackpot in Sports Lottery is 1/21.42 million, and the probability of winning the jackpot in Double Color Ball is 1/17.72 million... And the probability of picking the correct target from the global IPv4 list is 200 smaller than this.
multiple times.
But the target is in a city, and in terms of space, even if there is a traffic jam, taking the subway and riding a bicycle, one hour is enough to knock on the door.
In terms of probability, the possibility of picking the correct IP is three to four hundred times easier than winning the jackpot in the lottery.
This is not a small difference.
The fierce attack and defense of the broiler chicken before has given Ye Han enough reference.
Don't look at those boring IP addresses in the event log. What company or individual does this IP belong to? Why was it hacked into a broiler? Why was it selected as a springboard?
Through the analysis of broilers, we can roughly know the other party's invasion methods.
By analyzing the intrusion techniques, you can know which computers are the easiest targets for this person to capture.
By sorting the connections between different targets and using social network analysis [Note 1], it is possible to roughly target other infected chicken flocks and reversely deduce the source of infection.
It's still the same routine of scientists using computer programs to help the police solve crimes, but it's just moved from reality to the Internet.
This method is difficult on Earth because there are too many targets and it is a factorial increase, just like the NPC problem mentioned earlier.
But in the game, because the total number is four or five orders of magnitude different, the difficulty of this question also decreases factorially.
In addition, Ye Han also knows some optimization algorithms...
And for scientists, completely random numbers do not exist! With his sensitivity to numbers, Ye Han also found some personality characteristics of the other party's springboard IP...
With a crackle and a storm, I completed the input of the program. With all the NPCs dazed, I hit Enter and let the computer start filtering.
It took about the same amount of time as it took to count criminals. It only took three to five minutes before an IP address popped up.
It's actually one?
There is only one?
【……】
When the results came out, even Ye Han was surprised.
Usually the computer program will only screen out a list of targets and give each target's crime probability, which will be displayed on the map as a hot spot.
There are really very few cases where only one result is given.
After taking a closer look, it turns out that there are other results, but the probability is too low, less than 20%, while the probability of the only result is as high as 90%. It is highlighted and bolded according to the priority, and that's it.
Just as Ye Han was about to take a closer look at the origin of this IP, Wang Dachui exclaimed: "Huh? Isn't this, isn't this the IP of the second round?"
There are nine districts and nine police stations in the Evil City, exactly one for each district.
The first bureau is headquartered in the Central District, the fourth bureau is in the Lower East District, and the second bureau is in the North Coast District. Although the serial numbers are not far apart, one is in the southeast and the other is in the northwest, which separates the entire central district.
Wang Dachui is not the only one who recognizes this IP.
And if I don’t remember it in my head, can I still check it in the system?
In the blink of an eye, the technical department was in an uproar: "Those grandsons in the second game are here to cause trouble because of our good performance and being in the limelight!"
"No wonder the second round always steps on us during every evaluation. We always use such despicable tactics in our relationship!"
"No, no, this matter must be reported to the director immediately!"
The NPC was filled with indignation and quickly figured out the "truth", but what instantly appeared in Ye Han's mind was a different kind of truth.
So he’s from Micun?
No wonder...
He didn't know how many people came in Yicun this time, but he knew that the two A's among them were three stars of Huaxia Village - he only read the information before entering.
I knew from the previous system query that one of them was assigned to the second round, and he happened to be the one who specializes in hacking.
But he did not take action directly, but asked the system first.
"System, you said that confrontation with the same camp is prohibited. Is this considered a violation of the rules by the other party?"
Scientists are the most particular about rules.
If the other party doesn't violate the rules in this way, then it will definitely be fine for you to follow the same pattern.
If the other party violates the rules, there is no need to take action yourself...
Tell me, you are obviously so smart, why are you still so cautious?
You can't just rush over and destroy the other side, so that I can destroy you at the same time...
The system muttered in his heart, but he also knew that it was impossible to expect Ye Han to make a mistake here.
In fact, it doesn't have any objections to Ye Han. It gets full marks every time and is so showy and eye-catching that it also has its benefits.
What it is most dissatisfied with is that this guy keeps skipping levels and jumps up too fast... If the foundation is not stable, it will easily die; and the faster it jumps, the shorter the time it will stay here.
So when I have nothing to do, I like to fill in some small blocks for Ye Han, pull his hind legs, make him jump slower and more steady, and at the same time add a bit of dramatic effect.
If it doesn't move, it won't come back.
So when the words came to my lips, they turned into this picture of virtue——
[You said someone is confronting you, do you have any evidence?]
【╮(﹀_﹀”)╭】
Want evidence?
Ye Han pushed his eyes.
Usually it is difficult to find the IP of an internal network point like the police station and further investigate.
The relationship between the two parties is like the inside and outside of a house. They cannot be seen through a wall, and it is difficult to further lock them in using the previous method.
But Ye Han already knows who the target is?
The next step is to reverse verify the questions that already have answers. Is it still difficult?
Open the back door, enter the second game system in one fell swoop, lock the specific location of the target through monitoring, and just about to reverse...
"Click!" Suddenly the screen went black.
There was a power outage!
`(+﹏+)′
Writer’s words——
In the following chapters, some concepts that are relatively unfamiliar to ordinary readers will have [annotations] in the author's words at the end.
It seems, it seems... the author's words are not included in piracy websites...
This is considered a genuine benefit~
If there are any points in the previous chapters that you would like to mark, please leave a comment in this chapter and I will add them as appropriate.