Ethernet : Advantages And Disadvantages Engineering Assignment

1958 words - 8 pages

Ethernet
Contents
Introduction 1
Ethernet DTE and DCE 1
The Fundamentals of an Ethernet LAN, Explained 1
What You Need in an Ethernet LAN 2
How Ethernet Works 2
Types of Ethernet Cables 3
Advantages and Disadvantages of Ethernet Cables 5
Alternatives to Ethernet Cables for Computer Networking 6
References: 6
Introduction
Ethernet is a family of computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN). It was commercially introduced in 1980 and first standardized in 1983 as IEEE 802.3, and has since been refined to support higher bit rates and longer link distances. Over time, Ethernet has largely replaced competing wired LAN technologies such as Token Ring, FDDI and ARCNET.
The original 10BASE5 Ethernet uses coaxial cable as a shared medium, while the newer Ethernet variants use twisted pair and fiber optic links in conjunction with switches. Over the course of its history, Ethernet data transfer rates have been increased from the original 2.94 megabits per second (Mbit/s) to the latest 400 gigabits per second (Gbit/s). The Ethernet standards comprise several wiring and signaling variants of the OSI physical layer in use with Ethernet.
Systems communicating over Ethernet divide a stream of data into shorter pieces called frames. Each frame contains source and destination addresses, and error-checking data so that damaged frames can be detected and discarded; most often, higher-layer protocols trigger retransmission of lost frames. As per the OSI model, Ethernet provides services up to and including the data link layer.
Since its commercial release, Ethernet has retained a good degree of backward compatibility. Features such as the 48-bit MAC address and Ethernet frame format have influenced other networking protocols. The primary alternative for some uses of contemporary LANs is Wi-Fi, a wireless protocol standardized as IEEE 802.11.
Ethernet DTE and DCE
All nodes on an Ethernet network are either DTE (Data Terminal Equipment) or DCE (Data Communications Equipment).
Ethernet DTE are devices such as computers and printers that are trying to communicate on the Ethernet network.
Ethernet DCE are devices such as switches and routers that are trying to help other devices communicate on the Ethernet network.
The Fundamentals of an Ethernet LAN, Explained
Ethernet is the technology that is most commonly used in wired local area networks (LANs). A LAN is a network of computers and other electronic devices that covers a small area such as a room, office, or building. It is used in contrast to a wide area network (WAN), which spans much larger geographical areas. Ethernet is a network protocol that controls how data is transmitted over a LAN. Technically it is referred to as the IEEE 802.3 protocol. The protocol has evolved and improved over time to transfer data at the speed of a gigabit per second. 
Many people have used Ethernet technology their whole lives without knowing...

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