An Introduction To Ethernet
LAN is a very common word used when talking about the Internet connection. It stands for local area network. It is a network that connects computers and other devices in a specific geographic area. This area could be a house, office building, school or neighborhood. Each device on the network is a node.
The most popular LAN technology in use currently is Ethernet. The standard for Ethernet is defined by the Institute for Electrical and Electronic Engineers (IEEE). The IEEE Standard 802.3 defines the rules for configuring Ethernet.
Ethernet was developed by a researcher named Robert Metcalfe of the Xerox Corporation in the 1970′s. However it became popular only after Metcalfe convinced Digital Equipment Corporation and Intel to join with Xerox to develop the first draft of the Ethernet standard in 1980.
The first implementation of Ethernet used coaxial cables that were about 20 mm in diameter. This came to be known as Ethernet Thicknet. Thinnet Ethernet was introduced later, he used the cable TV cable at the moment.
The next development was Unshielded Twisted pair (UTP) cable which is a 4 pair cable similar to a telephone cable in both appearance and end connector. It has a variety of grades, of which level 1 is the lowest quality and level 5 is the best.
Level 1 and 2 are mostly used for voice and other low speed transmissions. Level 3 can handle speeds of up to 16mbps, level 4 handles up to 20Mbps and the finest cable level 5 can handle up to 100Mbps.
The Ethernet switch was first introduced in 1990 by a network equipment manufacturer in Silicon Valley called Kalpana. An Ethernet switch is a network device that connects network segments. It works to remove all unnecessary traffic that each segment transmitting the necessary traffic in this segment, which provides better network performance.
These switches are used to connect point-to-point links to reduce installation costs and to increase reliability while enabling point-to-point management and troubleshooting.
Communication between Ethernet is in the form of data packets that are both sent and delivered individually. Each Ethernet station is assigned a 48-bt Media Access Control (MAC) address. These MAC addresses are used to specify the source as well as the destination of each data packet.
Ethernet is a technology that has continued evolving since it was first developed. The evolution of the technology has included higher bandwidth and changes to the physical medium. It has now evolved into the underlying technology for current LANs.
Ethernet has gained much popularity because of decreasing cost of the hardware required to support it and also the less panel space that it requires. For these reasons, most manufacturers directly build the functionality of an Ethernet card into PC motherboards.
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