For a long time, a ten-megabyte network was the only way to connect computers. Although this technology had a number of features (stub terminators, signal collisions, wave impedance matching ), it was it that was most widely used.
The equipment was relatively inexpensive, installation was simple, and a speed of 1.25 MB / s suited everyone. However, the amount of data transmitted became more and more every year, and the requirements for network equipment were tightened. Therefore, in the 90s, the outdated solution was replaced by Fast Ethernet technology. In developing the wishes of users and manufacturers were taken into account, the "childhood diseases" of the 10-Mbit network were overcome.Fast Ethernet. Description
The time of the origin of technology can be considered 1992. It was then that a group of companies engaged in the creation of network equipment, including 3Com, SYNOptics and several others, created a special joint association called the "Fast Ethernet Alliance". His tasks included analysis of the developments of various manufacturers, which could be used to create a high-speed information transfer solution.
Moreover, the principles of the formation and transmission of data packets should not be too different from 10-megabit networks. This was necessary to maintain compatibility with CSMA / CD access.
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The main difference between Fast Ethernet and its predecessor - 10 Mbps Base-T - was a change in physical implementation.In addition to compatibility with the previous solution, the main advantages of this technology include:
- increase the speed of data exchange up to 12.5 MB / s (those same 100 Mb);
- use of random access method;
- the possibility of applying familiar solutions, since the function of creating star-shaped networks was preserved, and it was possible to use classic conductors: twisted pair and optical fiber.
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