Why 802.3

It is best known for its development of standards such as IEEE It uses carrier-sensing to defer transmissions until no other stations are transmitting. Is Ethernet a standard? In addition, today real-time Ethernet is the industry standard for communication applications.

Ethernet refers to a technology that allows devices connected by cables within a data network to communicate with one another. In an Ethernet, connected devices can build a network and exchange data packages.

What is mean Ethernet? Ethernet is the traditional technology for connecting wired local area networks LANs , enabling devices to communicate with each other via a protocol -- a set of rules or common network language. An Ethernet cable is the physical, encased wiring over which the data travels. What is Ethernet standard? Bridges and switches are a solution in modern networks, as they can be used to segment the Ethernet.

Abuse by MAC flooding or MAC spoofing, for example, still poses a danger for the stability of the network and the security of the communicated data packages. Working securely with Ethernet therefore requires serious use of all connected systems and regular data analysis e. LAN analysis to uncover potential cases of misuse or disturbances. Capacity utilization rates of more than 50 percent can cause data jams, though.

As personal computers developed technologically and continuously increased their data volume, Ethernet networks also had to develop further to keep pace with the progress of technology. Switches are responsible for efficiently dividing data packages and minimizing the risk of collisions.

Modern cable technologies like twisted pair and fiber optic have higher transfer rates meet the modern requirements for a network.

With this mechanism, data transfer can temporarily be stopped to alleviate data flow from another location. This is especially practical in full-duplex mode when a network serves a relatively high number of end devices. The flow control for specific members of the network is temporarily cut off to optimize the overall reliability of the network. This can also cause losses in speed, though, which can then be stemmed by other mechanisms such as the transmission control protocol.

In the past, Ethernet primarily used conventional coaxial cables. Today, twisted pair copper cables and fiber optical cables are the industry standard, as they enable much faster transfer rates and a larger range.

Another advantage is that copper cables can also supply power to connected devices. In the Xerox Palo Alto Research Center, the visionary Robert Metcalfe was already working on an early version of the cabled Ethernet protocol at the beginning of the s.

It was intended to make work within the company easier first, and then be actively tested. The test phase peaked in with a scientific paper, published by Metcalfe together with David Boggs. It described local networks of connected personal computers. In , Metcalfe founded his own company 3com to push forward with the development of computers and LAN and establish Ethernet as standard.

In , he made his breakthrough with the adoption of Ethernet 1. Padding : This is added to the data to bring its length to the minimum requirement of 46 bytes. It contains the error detection information. George John. Previous Page Print Page. Next Page. This means that additional drivers do not need to be loaded in all but the most exceptional circumstances to enable devices to connect to to an Ethernet local area network.

There are several network topologies that can be used for Ethernet communications. The actual form used will depend upon the requirements. In this the nodes detected if data was being sent and if it was they would back off and resend their data later. Collisions are only possible if station and switch attempt to communicate with each other at the same time, and collisions are limited to the individual link.

Furthermore, the 10BASE-T standard introduced many years ago adopted full duplex techniques and in view of the improvements it provided, this technique became the standard for future developments of the Ethernet standard. In full duplex, switch and station can send and receive simultaneously, and therefore modern Ethernet data networks are collision free.

When communicating over a data network, the Ethernet system divides the data into a set of what are termed frames. These frames have a specific format and each one contains the source and destination addresses.

The frame also contains information for error checking so that any data that is corrupted can be detected.

If errors are detected then typically the higher layers of the protocol stack for the system will discard the data and request a re-transmission. Ethernet adopts the OSI model for its protocol stack and in line with this, Ethernet itself provides services up to Layer 3, the data link layer.

Ethernet has adopted the 48 bit MAC address format that has also been used by other IEEE standards and int his way there is commonality across many standards making it much easier for various data networking systems to operate alongside each other. There are versions of Ethernet that are used for higher grade performance associated with large metro or wider area networks.

Metro Ethernet and carrier Ethernet are two terms that are often used. Metro Ethernet and Carrier Ethernet are now well established variants used by many carriers and service providers to allow businesses to have high performance interconnections over dedicated or shared high performance Ethernet resources.

Although Ethernet data networking was originally introduced in the s it has undergone a continual process of update.