Chapter 107 The OSI Model with Extreme Fluffiness

(I'm tired, but I'm finally done, if we can still read and write books together, can you please don't urge more, it's really powerless...... )

"Mr. Bob, as we all know, Mr. Yao Fei's Feiyue Technology Company is a very innovative company, and it can be said that every product produced by their company contains a lot of innovation, so I can't give an accurate answer to your question just now.

Maybe you can seek the answer to this question from Mr. Yao Fei, and I can analyze the answer he gave to help you understand the feasibility......"

Analysis is analysis, but if he wants Haywater to give an exact answer, how can he give it, and if he can give it, he won't be here, so in order not to dig a hole for himself, he very wisely chooses to let Bob ask Yao Fei himself.

And now, I'm afraid everyone can see what Yao Fei meant by calling Bob, the meaning of Yao Fei's words just now is very obvious, that is, to let his employer, Mr. Bob, retreat, so in order to further dispel Warburg Pincus' plan to continue to invest in Noeller, Yao Fei must be willing to solve Bob's doubts.

"Mr. Yao Fei, if you can convince Mr. Powell and Mr. Drinker, we at Warburg Pincus will consider canceling our investment plan, what do you think?"

Since Haywater said so, Bob could only change the other party to Yao Fei, on the one hand, he promised to withdraw the investment, and on the other hand, in order to take care of his own face, he just said that he would consider it.

"That's all?"

If you don't teach a lesson, wouldn't it be that any cat or dog will fly over them to grab business with them in the future!

"And what do you mean?"

So far, Bob can only choose to follow up, even if it is for the slightest fluke that still exists in his heart.

"A 50 million-level loan opportunity from Warburg Pincus, the interest will be paid by our company at the normal loan interest rate, I believe that with Mr. Bob's ability, it can be ......."

Regardless of whether he needs this loan in the future or not, Yao Fei now needs to make what he should be, but he said this in Bob's ear, and handed the other party a paper and pen at the same time, the meaning is obvious, and the words recorded on the paper have effective legal effect.

"What if I choose to say no?"

Bob thought he had made enough concessions on his own, and he didn't expect that the other party would press him step by step when he succeeded in getting his idea, which of course made him angry, and even a little angry.

"Then I have the right to refuse to answer Mr. Bob's question!"

Yao Fei just had an indifferent expression, showing that he was ready to leave at any time, and Jim was also acting with Yao Fei, and the scene was quite confusing.

"Well, you win, if you can really come up with a skill that Mr. Hywater and Mr. Powell can approve of, I will cancel this investment plan, and promise you the conditions, I will guarantee it in the name of a believer in God's sincerity!"

Bob hesitated for a while, but in the end, in order to figure out the situation, he still agreed to Yao Fei's conditions.

"For how to realize the communication between computers, our company has sorted out a very complete network interconnection mode based on TCP/IP protocol after a lot of efforts.

In this mode, we divide the entire communication network into 7 layers from low to high, which are the physical layer, the data link layer, the network layer, the transport layer, the session layer, the presentation layer and the application layer. Layers 1 to 3 belong to the lower three layers and are responsible for creating links for network communication connections, while the fourth to seventh layers are the upper four layers and are responsible for end-to-end data communication.

Each layer implements its own specific function, each layer directly serves its superior, and all layers support each other, while network communication can be bi-directional, either top-down (at the sender) or bottom-up (at the receiver).

The physical layer involves the original bit stream transmitted on the communication channel, which defines the mechanical, electrical, functional, and procedural characteristics required to transmit data, including voltage, cable, data transmission rate, interface definition, etc. The main task of the data link layer is to provide control over the physical layer, detect and correct possible errors, and control the flow rate.

The data link layer is concerned with physical addresses, network topology, cable planning, error checks, and flow control.

The network layer determines the best route for transmission packets, and its key problem is to determine how to select the route of packets from the source to the destination, and the network layer calculates the route through the routing protocol.

The basic function of the transport layer is to receive data from the session layer, and when necessary, divide it into smaller units, pass it to the network layer, and ensure that the information of each segment reaches the other party is correct, and the transport layer establishes and maintains virtual circuits, error checks, and flow control.

The session layer allows users on different machines to establish, manage, and terminate session relationships between applications, involving a session layer that allows each application to know the state of other applications, as well as duplex negotiation, session synchronization, and more.

The presentation layer focuses on the syntax and semantics of the transmitted information, and it processes the computer-related data from the application layer into a computer-agnostic format to ensure that the peer device can accurately understand the sender data, and the presentation layer is also responsible for data security.

The application layer is the layer closest to the user of the OSI reference model and is responsible for providing network services for applications, including file transfer, file management, and email message processing. ”

Yao Fei is talking about the international OSI open system interconnection reference model, this model has its absolute advantages, because it can divide the entire huge and complex problem into N simple and easy to deal with small problems, and as we all know, in the scientific community, can make complex problems simple, then the goal of problem solving will not be very far.

And the reason why Yao Fei took out this model is because it is complex enough and has enough gimmicks to fool these two knives, which is very suitable.

As for the actual use, people use a simplified version of it, which is to put it bluntly, to help people understand the structure of the network, and it plays more of a learning role.

Study, of course, the more carefully you study, the better, so in the minds of Haywater and Powell at this time, they both chose to believe what Yao Fei said before, and they completely believed it.

"Mr. Yao Fei, thank you for your answer, I think we still need some time to argue what you just said, tomorrow, tomorrow morning we promise to give you a satisfactory answer......"