Internet links to almost every part of the world, it contain various kinds of information and huge, how to find the information we possibly need information, like how we look for in the big a small boat, we can use satellite positioning system, or communication system can be, and it needs to be used in [...]
In the 1980 s, the world almost all developed countries are now in the national education and built the computer network, the scientific research and cover the world behind each other international academic computer network Internet. This global computer information networks in the life to speed up the information transmission speed, for the overwhelming majority [...]
For historical reasons, the network has DuoZhong method, which can be classified according to the topology structure, network and 1 scope, the transmission medium, the service object characteristics such as classification.
Different classification, is a description of the different characteristics.
A network is the foundation of network equipment, communication cable (media >, communication protocol and software. In the development of the network process, invented all kinds of network equipment, the equipment through the communication medium, constitute the connecting our network. In the network equipment, the most common is the following:
According to cover range, the network can be divided into LAN, wan and man, this is the most common computer network classification method. Each network have different features.
(a local area network (LAN)
LAN is the most network application form, is also the subject of a Internet. A computer can construct LAN in just a few or [...]
The second generation, resources and communication subnet separate subnets more interconnected network host; The third generation, packet switching network; The fourth generation to OSI, as a representative of the standardization of the network; The fifth generation, in the Internet, driven to TCP/IP based, with optical fiber
For a 10 people, including the party huai also incognizant who, along with the guests began to talk to the beginning, the social relation also began to form. At first, different group is mutual space (left >. Although the group exist social link (in attachment >, but said a this group, with other people, everyone [...]
On September 18, 1783, in st. Petersburg, mino raiola HaErDe euler (. 211160 as usual began a new day. He gave one of his grandchildren said a math class, then counted the balloon flight problems. Three months ago, in Lyon south, with al gore’s fee of 0111801 061 brothers (” 151 * 0 out [...]
According to? research, 1997, 901801 collection of web document number more than most, so it is more outstanding, is the most comprehensive coverage of the search engine. The news of the company in the world is big news. When 901801 market director wear d-general Richard (3) catch Qu rainbow (remember Yang) have proudly say: “we [...]
When I was a child I especially love to read science fiction. Then those books that I believe, in the 21 st century, all the daily chores will by the exterior of the robots like humans into. However, we enter the new one thousand years after, but still see these humble slave machines. Or, robot [...]
In 1912, the proms Anna ‘xiang) with just now he had was pregnant with the third child, is later Paul. At that time, in Budapest streets, people talk about the most is the most excellent Hungarian world-class writers published new poems. In literary critics see before the first edition of poetry
This is the earliest and most ancient method. Through the crack password weak account, to get the system control. After seizing control, can reset the password and identity, as the entrance into the system.
In the information system, will have the user’s identity verification procedures. Through the control of the process of the source code to [...]