SEMINARLab

Ultimate way of free seminar, assignment, question&answer, theses, news, downloads....

 

Ethernet

Ethernet is a shared local are networking (LAN) technology that was developed in the early 1970s by some of the same pioneers who were working on the development of ht internet. The basic design consists of a shared transmission medium in the form of a coaxial cable or a multi-port hub. If the medium is a cable, workstations (nodes) are tapped into the cable along its path through room or building. If a hub is used, workstations connect to the hub via twisted-pair cables in a star-like configuration. Since the communication medium is shared, nodes must listen to make sure the cable is not in use before transmitting, this works well for small LANs, but the sharing scheme runs into problems as networks grow, as will be explained.

Commercial development of Ethernet took place in the 1980s. The system was jointly developed as a standard in 1980 by Digital Equipment Corporation, Intel, and Xerox. This standard became known as DIX Ethernet, in reference to the developer’s names. The IEEE (Institute of Electrical and Electronics Engineers) 802.3 standard defines a similar scheme that uses a slightly different framing method. The IEEE 802.3 standard was adopted as an ISO (International Organization for Standardization) standard and is now used worldwide. General Ethernet features are:

• Shared media
• Broadcast domains
• CSMA/CD (Carrier Sense Multiple Access / Collision Detection) access method
• Collision Domains
• Framing Method
• Full-duplex mode
• Cable types
• Cable length
• MAC addresses

more detailes, please visit:

http://www.linktionary.com/e/ethernet.html

http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1904.htm

ttp://www.3com.com/technology/

http://grouper.iee.org/groups/802/3