Chapter 925 (1/2)

Although voting has subjective factors, it is also a fair practice. Finally, after voting, the University of California, Johns Hopkins University, Harvard University and Princeton University won and got the quota of auxiliary root server.

Stanford University gets a primary root server and Britain and continental Europe get a secondary root server. As for which university to put in the end, they need to make an internal decision. Japan and Xiangjiang Yulin Institute of technology each get a secondary root server. In the United States, MIT, the University of Chicago, the University of California, Harvard University, Johns Hopkins University and Princeton University each received a secondary root server.

So far, the initial distribution of the Internet cake has been completed, and baozixuan is very satisfied with the result. Yulin Institute of technology is happier to get a secondary root server than to earn 1 billion.

Joe Douglas then said, ”now that the servers have been identified, the problem is to link them together. Ensure that each secondary root server can be connected to the primary root server. Only in this way can global interoperability be realized. ”

”At the same time, a new generation of industrial computers should also be put on the agenda. I hope heiyun and IBM can pay attention to this.”

There are no more than two ways to connect to the server. In the early days, people would lay lines in the sea for connection. Now there is satellite assistance. But the transmission data of satellite is limited, which is not suitable for the connection and data transmission between various servers on the Internet.

Seeing that everyone was silent, President Reagan smiled and said, ”whether it's the laying of optical fiber, the conversion of interfaces, or server applications. Black cloud group has R & D and participation. Mr. Bao, don't be modest. You can introduce it to you. ”

In fact, Reagan was also very helpless. If he wanted to develop the Internet, he had to find a Xiangjiang enterprise to participate. Moreover, according to the opinions given by think tanks and experts, things could not be done without the participation of black cloud group. Unless you play hooligans and ignore the patent law. But that will damage the national image of the United States and will not be recognized by the mainstream society.

According to the opinions given by experts, if baozixuan is willing, he can create an Internet by himself. Americans must not tolerate similar things, which put the upgrading of ARPANET on the agenda.

Hearing President Reagan's personal roll call, baozixuan knew he couldn't get rid of it. So he stood up and said, ”the server is easy to solve. Blackcloud group has reached an agreement with Intel that the two will jointly develop new industrial computers. The performance is definitely more than three times that of the most advanced computers available, and the price has hardly increased. ”

”As for the connection between servers, submarine optical cable transmission technology needs to be used.”

”Compared with terrestrial optical cables, submarine optical cables have many advantages: first, laying does not need to dig pits or support with supports, so the investment is less and the construction speed is fast; Second, except for the landing section, most of the cables are on the seabed at a certain depth and are not damaged by the natural environment such as wind and waves and the interference of human production activities. Therefore, the cables are safe and stable, have strong anti-interference ability and good confidentiality. ”

”As for the construction method, the submarine optical cable design must ensure that the optical fiber is not affected by external forces and the environment. Its basic requirements are: it can adapt to the submarine pressure, wear, corrosion, biological and other environments; Suitable armor layer shall be provided to prevent fishing vessel trawling, anchor and shark damage; When the optical cable is broken, the length of seawater penetrating into the optical cable shall be reduced as much as possible; It can prevent hydrogen from penetrating into the optical cable from the outside and hydrogen generated inside; A remote power supply circuit with low resistance; Able to bear the tension during laying and recovery; The service life is generally required to be more than 25 years. ”

”Deep sea; The submarine optical cable with a depth of more than 1000m adopts the steel wire free armor structure, but the structure and reinforcing components of the optical cable core must be able to protect the optical fiber to prevent the high pressure of seawater and the high tension during laying and recovery. In order to prevent shark injury, two layers of steel belt shall be spirally wrapped on the sheath of deep-sea optical cable in shark infested waters, and a layer of polyethylene outer sheath shall be extruded. ”

”Shallow water; The cable core structure of submarine optical cable with water depth less than 1000m is the same as that of deep-sea optical cable, but the shallow sea optical cable shall have single-layer or double-layer steel wire armor. The number of armor layers and the outer diameter of the steel wire shall be determined according to the submarine environment, water depth, burial, fishing, etc. of the submarine cable route. ”

”At present, heiyun group has developed a special construction ship that can be used for submarine optical cable laying. In shallow sea, if the water depth is less than 200m, the cable shall be buried, while in deep sea, it shall be laid. Hydraulic jet burying is the main burying method. ”

”There are several rows of spray holes at the bottom of the buried equipment, which are distributed on both sides in parallel. During operation, each hole sprays high-pressure water column to the seabed at the same time to wash away the sediment on the seabed and form a submarine cable trench; There is a fairlead hole on the upper part of the equipment, which is used to guide the optical cable to the bottom of the submarine cable trench, and the gully is automatically filled by the tidal current. The buried equipment shall be towed forward by the construction ship, and various instructions shall be made through the working cable. Generally, the cable laying machine has no underwater embedding equipment and is laid on the seabed surface by the self weight of the submarine cable. ”

”The ship keeps moving forward, and then the underwater robot flushes a ditch to put the optical cable in, and then the underwater robot flushes the sediment back to cover the optical cable, and then keeps moving forward. When it needs to be connected, it is connected on the ship first, then sealed, and then continued to be laid. All submarine optical cables are optical fibers, and there are few cables, and all the cables are buried in the soil, that is, the underwater robot flushes a ditch, puts it in, and then buries the soil. ”

”As for the underwater robot, it actually uses a high-pressure water pump to pressurize the water to a high pressure and spray it out, so as to rush out of the groove. As for maintenance, there is no maintenance. Generally, maintenance is not required. It only needs to regularly survey whether the optical cable is exposed by the underwater robot, and if so, cover the sediment. In addition, if it is broken, the specific position can be obtained by measuring with the attenuation detector, and then go there to fish it for connection or other methods. Usually, all the damaged sections are cut off and replaced with a new section. ”

Bao Zixuan said that not only President Ronald Reagan, but also the computer experts present here were a little silly. It turned out that the boy took everything into account and couldn't play without taking others.