The Goddess Shines on America

"Hey Jeff, pass me the file!"

"Hey Jeff, I'm handing over this line of code to you, I'm going to the bathroom."

An office of Cisco Systems, although the decoration is very simple, but the desks and computers are all high-end equipment, seven or eight people work in a team environment, for Jeff Bezos who has just found his first job, this is very difficult. But very comfortable.

Sip the free black coffee, taste the free meals and fruits provided at noon, type your beloved code, and feel the mutual help and friendship among colleagues. This place is simply paradise!

I have been working for a while, and because of my Princeton University degree and excellent grades, Bezos is fortunate to join the research and development of a new Cisco project.

Switch, this is the name proposed by Leonardo Posak, the Minister of Technology, but when he described the specific functions of this instrument, Bezos was keenly aware from the details of his words that it did not seem to be Posak. K's own idea. But since the leader didn't explain anything, of course he didn't care.

In fact, for Bezos, whether it is Cisco's current flagship product router or the so-called switch that Posak is now starting to study, they are all very magical and new things. During his four-year college career, Bezos majored in computer science, but the products produced by the company he came to are something that has never been seen in the industry. It can be said that from all angles, he is absolutely full of motivation. Now that he has joined the switch research team, his enthusiasm for work simply surpasses everyone!

However, both Bezos and his colleagues quickly discovered that many manufacturing steps in the current router field would have to be modified if the planned switches were to be realized.

As for the difference between routers and switches, and what kind of technology new products need to have... Posak has provided information.

This is something that surprised Bezos, and it is also very confusing. Because practice has proved that Bosak doesn't know anything more than the rest of them, and everyone is completely on the same starting line. However, he took out a very detailed and key-point document, which explained in detail what technology the switch needs to use, what technology looks like, and even compared it with the router, which is incredible. .

However, since 80% of the company's employees were quickly recruited within a few months, everyone did not ask Posak in detail for the time being.

To say what a switch should look like, we must first understand the characteristics of a router.

First of all, a router is a third-layer network device. The so-called third layer is actually a definition made by a document integrating the functions of a switch. The first layer of network equipment is a hub, which belongs to the physical layer and has no data processing capability. Its function is simply to transmit current to other ports; the second layer is the switch that everyone is currently studying. According to the concept, it should be able to distinguish MAC The source address and destination address, that is, the detailed information of the physical hardware address, and then establish a connection between any two ports. After this is the third layer, the router is responsible for parsing the IP address in the data.

Secondly, it can connect different types of networks, which is also the original intention of router development. The router can connect different types of LAN and WAN, such as Ethernet, ATM network, FDDI network, token ring network, etc. Different types of networks have different formats and sizes of the transmitted data units—frames, just as road transport loads goods in units of cars, while railway transport loads goods in units of wagons, changing from car transport to For railway transportation, the goods must be put from the car to the train wagon, and the same is true for the data in the network. When data is transferred from one type of network to another, frame format conversion is necessary.

Finally, the router also has a path selection function. Because in the network, there may be many paths from one node to another node, and the router can choose a smooth and fast shortcut, which greatly improves the communication speed, reduces the communication load of the network system, and saves network system resources.

It can be said that Bezos couldn't help but get excited after initially learning what Cisco was producing. As he can see from time to time, all the employees in the company are working hard all the time, and it is completely normal to work overtime until ten o'clock at night.

Because the products they are producing are treasures that can cause the development of the global network!

As for the idea of ​​the switch...

According to the idea provided by the document, there are two types of switches, namely Ethernet switches located in the second layer network, and node switches located in the third layer. It is used to expand the local area network, and the working principle is relatively simple, that is, to address according to the MAC address, and then select the route through the station table. As for the establishment and maintenance of the station table, it is all carried out by the switch, but it is also fully automatic.

Undoubtedly, this so-called Ethernet switch will be the most mainstream product of the company. The difference between it and the so-called node switch is that, first, the node switch works in the wide area network, while the Ethernet switch works in the local area network. The second is that the node switch is used to store and forward data packets, and has a built-in forwarding table to implement the routing protocol. Only the mapping table of the MAC address and the host is logically a bus structure.

All in all...complicated.

That was Bezos' first thought after reading the document.

And he was also really curious, the company hasn't even shown any trial works yet, why did Posak come up with such systematic information?

"Dongke, I'm going to the bathroom, don't let anyone stop me, I've been here for five hours straight."

From working in the middle of the night to early in the morning, the table was full of disposable paper cups for coffee, with two dark circles under his eyes, Bezos walked into the hallway with a yawn, and ran into the bathroom in a flash.

Of course, Bezos doesn't know the company's financial situation, but it can be seen that the profit effect is really not generally good, at least from the decoration of the bathroom. The bright copper faucet and the sink of a high-end brand, the perfume placed there is still exuding a charming smell, if you add some soft music, it will look like a high-end hotel.

This is definitely not something that the Bosacks can design, and Bezos can guess it even if he is stupid. A marketing minister and a technical minister, they are all typical pedantic figures, the same sum of money, of course they will spend it on buying more equipment, instead of such trivial things as decorating the bathroom.

So, after thinking about the entire structure of the company, Bezos cheerfully realized that maybe only the chairman who never showed up would think so?

By the way, what is the chairman's name?

Bezos has been busy developing new projects all day long, and Bezos suddenly realizes that he has even forgotten such an important thing.

After going to the toilet, he wandered casually in the corridor. Indeed, it was about ten o'clock in the morning, exactly when the work day had just begun. However, companies in the IT industry can't treat it with common sense. They have been working from get off work last night until late at night, and after a short rest, they have been busy from five o'clock in the morning until now. Can't they let people take a rest?

"Ah~ I'm exhausted. Wouldn't it be better to have another drink when I go back?"

Bezos didn't pay attention to where he was going, even though the walk was a bit confusing, and his mind was full of thinking about another cup of coffee. When he finally came back from a trance, he realized that before he knew it, he had walked to the door of the office with the CEO printed on it.

Well, the chairman is the CEO, and the company is not too big and complicated, but the small words under the brand name make many colleagues talk about it, wondering who the boss of their company is all day long.

Under the big golden characters of "CEO", a line of cursive handwriting is very delicate, but the content of the words is not polite at all.

"I-am-CEO, bitch!"

It can be seen that the boss has a lot of personality, so it's no wonder he doesn't go to work all day.

"What's wrong with not going to work? I'm the CEO, who dares to say anything!?"

As soon as Bezos finished speaking, the door suddenly opened.

It suddenly opened.

Then open.

opened.

up.

The cold sweat on Bezos' body is really dripping down without money...

However, when he looked at the figure at the door, he was immediately dumbfounded.

Dear friends, the eighth update is here.

Let's give a reward~

Then the ninth update is at 22:00