39 ethernet


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39 ethernet

  1. 1. ETHERNET<br /> Presented By:<br />Priyanka Patel<br /> V CE:1 <br /> Roll No:39<br />
  2. 2. Introduction<br />Ethernet Basics<br />Ethernet Terminology<br />Ethernet Medium<br />CSMA/CD<br />Collision Detection <br />Limitations of Ethernet<br />Repeaters <br />Segmentation <br />Bridges<br />Routers: Logical Segmentation<br />Switched Ethernet<br />Full-duplex Ethernet<br />
  3. 3. INTRODUCTION<br />Ethernet:Ethernet is the most widely-installed local area network ( LAN) technology. <br />Xerox Corporation’s <br />Specifid in a standard,IEEE 802.3<br />An Ethernet LAN typically uses <br /> ->coaxial cable<br /> ->twisted pair wires<br /> ->Fiber Optics <br />
  4. 4. Vrious types of ethernet<br /> ->10Base2<br /> ->10base5<br /> ->10baseT<br /> ->10baseF<br />10Base2 speed 10Mbps<br />Fast ethernet (100BASET):100Mbps<br />
  5. 5. The first mass produced personal computers featuring the 1000BASE-T connection.<br />Gigabit ethernet:1Gbps<br />Ethernet is also used in wireless LANs<br />
  6. 6. ETHERNET BASICS<br />Ethernet networks traditionally operating within a single building, connecting devices in close proximity.<br />These devices could have only a few hundred meters of cable between them.<br /> Increased these distances to span tens of kilometers<br />
  7. 7. There are many technologies that allow you to get connected to the Internet, including this wireless Internet card.<br />
  8. 8. Digital subscriber line (DSL) technology transmits data over phone lines without interfering with voice service. A DSL connection works better when you are closer to the provider's central office. <br />
  9. 9. The broadband modem can use DSL or a cable Internet service to go online. Here, the DSL line connects to your phone jack and the USB line or Ethernet to your computer.<br />
  10. 10. ETHERNET TERMINOLOGY<br />Medium - Ethernet devices attach to a common medium that provides a path along which the electronic signals will travel.<br />Previously this medium has been coaxial copper cable,but today it is more commonly a twisted pair or fiber optic cabling. <br />Segment - We refer to a single shared medium as an Ethernet segment. <br />
  11. 11. Node - Devices that attach to that segment are stations or nodes. <br />Frame - The nodes communicate in short messages called frames, which are variably sized chunks of information.<br /> (Frame Formate)<br />Preamle<br />OSF<br />Destination add.<br />Source add.<br />Length<br />Data<br />Pad<br />c.s.<br />
  12. 12. ETHERNET MEDIUM<br />Since a signal on the Ethernet medium reaches every attached node, the destination address is critical to identify the intended recipient of the frame. <br />
  13. 13. CSMA/CD<br />CSMA/CD signifies carrier-sense multiple access with collision detection,describes how the Ethernet protocol regulates communication among nodes.<br />Before a station transmits, it checks if another station is transmitting. If the medium is quiet, the station recognizes that this is an appropriate time to transmit. <br />
  14. 14. LIMITATION OF ETHERNET<br />Electrical signals propagate along a cable very quickly, but they weaken as they travel, and electrical interference from neighboring devices can scramble the signal. <br />Distance limitation on the maximum separation between two devices (called the network diameter) on an Ethernet network.<br />In CSMA/CD only a single device can transmit at a given time.<br />
  15. 15. REPEATERS<br />The first Ethernet medium was a copper coaxial cable known as "thicknet.“ <br /> length of a thicknet cable was 500 meters. Not enougth for building or campus environment. <br />Repeaters connect multiple Ethernet segments, listening to each segment and repeating the signal heard on one segment onto every other segment connected to the repeater.<br /> By running multiple cables and joining them with repeaters, you can significantly increase your network diameter. <br />
  16. 16. SEGMENTATION<br />Ethernet networks faced congestion problems as they increased in size. <br />If a large number of stations connected to the same segment and each generated a sizable amount of traffic, many stations may attempt to transmit whenever there was an opportunity.<br />To reduce congestion would be to split a single segment into multiple segments, thus creating multiple collision domains. <br />
  17. 17. separate segments are not able to share information with each other<br />
  18. 18. BRIDGES<br />Bridges connect two or more network segments.<br />Increasing the network diameter as a repeater does,also help regulate traffic.<br />Incrase diameter of network.<br /> They can send and receive transmissions just like any other node, but they do not function the same as a normal node. <br />The bridge does not originate any traffic of its own; like a repeater.<br />
  19. 19. Bridge will reduce unnecessary traffic.<br />It examining the destination address of the frame before deciding how to handle it. <br />
  20. 20. ROUTERS<br />Routers are advanced networking components .<br />Also called Logical Segmentation.<br />Both local and wide area, and has led to their widespread deployment in connecting devices around the world as part of the global Internet.<br />Routers operate based on protocols that are independent of the specific networking technology.<br />
  21. 21. FULL DUPLEX ETHERNET<br />Full-duplex is a data communications term that refers to the ability to send and receive data at the same time.<br />In a totally switched network, nodes only communicate with the switch and never directly with each other. <br />Switched networks also employ either twisted pair or fiber optic cabling, both of which use separate conductors for sending and receiving data. <br />
  22. 22. This allows end stations to transmit to the switch at the same time that the switch transmits to them, achieving a collision-free environment. <br />
  23. 23. REFERENCE<br />www.howstuffworks.com<br />www.google.com<br />
  24. 24. THANK YOU…<br />