2.6 ethernet ieee 802.3
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The document discusses Ethernet networks and communication. It covers the evolution of Ethernet from standard Ethernet operating at 10 Mbps to 10 Gigabit Ethernet at 10 Gbps. It describes Ethernet's frame format including fields for preamble, start frame delimiter, destination/source addresses, length/type, data, padding, and CRC. It also discusses Ethernet addressing using MAC addresses and Ethernet's access method of CSMA/CD.
![Session Summary
Ethernet Concepts
• Evolution of Ethernet
• Standard Ethernet and their variations
• Fast Ethernet and their variations
• Gigabit Ethernet and their variations
• 10 Gigabit Ethernet and their variations
• Frame Format of Ethernet
• Access Control for Ethernet – [CSMA – CD]
• Performance Evaluation of Ethernet](https://image.slidesharecdn.com/2-200809145203/85/2-6-ethernet-ieee-802-3-15-320.jpg)
2.6 ethernet ieee 802.3
- 2. Overview of Module - 2 • Framing • What is Framing • Types of Framing • Methods for identifying the boundaries • Flow Control • What is flow control • Types of flow control • Access Control • What is access control • Types of access control • Ethernet – IEEE 802.3 • Evolution of Ethernet • Frame Format of Ethernet • Access Control for Ethernet • Performance Evaluation of Ethernet • WLAN – IEEE 802.11 • Architecture • Bluetooth • WIFI • Zigbee • 6LowPan • Network Layer Services • IPv4 • Packet switching • Network Layer Protocols Visit www.youtube.com/GURUKULA for Lecture Videos
- 3. In this session: EVOLUTION FRAME FORMAT ADDRESSING ACCESS METHOD EFFICIENCY Visit www.youtube.com/GURUKULA for Lecture Videos
- 4. Ethernet – Evolution • The Ethernet LAN was developed in the 1970s by Robert Metcalfe and David Boggs. Since then, it has gone through four generations: Visit www.youtube.com/GURUKULA for Lecture Videos
- 5. Evolution of Ethernet – Standard Ethernet • Entry level ethernet. • Operated at data rate of 10Mbps • Defined the frame format • Use 48 bit addressing Visit www.youtube.com/GURUKULA for Lecture Videos
- 6. Evolution of Ethernet – Fast Ethernet • Upgrade the data rate to 100 Mbps. • Make it compatible with Standard Ethernet. • Keep the same 48-bit address. • Keep the same frame format. Visit www.youtube.com/GURUKULA for Lecture Videos
- 7. Evolution of Ethernet – Gigabit Ethernet • Upgrade the data rate to 1 Gbps. • Make it compatible with Standard or Fast Ethernet. • Use the same 48-bit address. • Use the same frame format. • Keep the same minimum and maximum frame lengths. • Support auto negotiation as defined in Fast Ethernet. Visit www.youtube.com/GURUKULA for Lecture Videos
- 8. Evolution of Ethernet – 10 Gigabit Ethernet • upgrading the data rate to 10 Gbps, • keeping the same frame size and format, • allowing the interconnection of LANs, MANs, and WAN possible. • This data rate is possible only with fiber-optic technology at this time. • The standard defines two types of physical layers: LAN PHY and WAN PHY. • The first is designed to support existing LANs; the second actually defines a WAN with links connected through SONET OC-192.
- 10. Ethernet Frame Format Visit www.youtube.com/GURUKULA for Lecture Videos
- 11. PREAMBLE: • 7 BYTES containing alternate 0’s and 1’s • This alerts the receiving system about the incoming frame and helps in synchronization • This is added at physical layer. Not a part of frame. SFD (Start Frame Delimiter): • This segment is 1 byte long. • This indicates the start of the frame. • The last 2 bits (11) alerts the receiver that the next field is destination address. Destination Address (DA): • It is of 6 bytes. • Contains the physical address of the destination host or stations. Source Address (SA): • It is of 6 bytes. • Contains the physical address of the Source host or stations. Length or Type: • Used for 2 purpose • Ethernet (Type) – To define the upper layer protocol. • IEEE (Length) – To specify the number of bytes in the data field. Data & Padding: • It can be a minimum size from 46 bytes to maximum of 1500 bytes. • It carries data encapsulated from the upper layer Cyclic Redundancy Check : • This field contains Error Detection Information.
- 12. Ethernet - Addressing • Already Discussed in previous sections • Ethernet uses MAC Address. Refer to Physical Addressing topic we studied already Visit www.youtube.com/GURUKULA for Lecture Videos
- 13. Ethernet – Access Mechanism - CSMA CD Visit www.youtube.com/GURUKULA for Lecture Videos
- 14. Efficiency of Standard Ethernet • The efficiency of the Ethernet is defined as the ratio of the time used by a station to send data to the time the medium is occupied by this station. The practical efficiency of standard Ethernet has been measured to be Efficiency = 1 / (1 + 6.4 * a) • in which the parameter “a” is the number of frames that can fit on the medium. • It can be calculated as a = (propagation delay)/(transmission delay). • Note that as the value of parameter a decreases, the efficiency increases. • This means that if the length of the media is shorter or the frame size longer, the efficiency increases. • In the ideal case, a = 0 and the efficiency is 1. Visit www.youtube.com/GURUKULA for Lecture Videos
- 15. Session Summary Ethernet Concepts • Evolution of Ethernet • Standard Ethernet and their variations • Fast Ethernet and their variations • Gigabit Ethernet and their variations • 10 Gigabit Ethernet and their variations • Frame Format of Ethernet • Access Control for Ethernet – [CSMA – CD] • Performance Evaluation of Ethernet
- 16. References: • Behrouz A. Forouzan, ―Data communication and Networking, Fifth Edition, Tata McGraw – Hill, 2013 • Larry L. Peterson, Bruce S. Davie, ―Computer Networks: A Systems Approach, Fifth Edition, Morgan Kaufmann Publishers, 2011. • Few online References (Will be Mentioned in the description Section) Thank You…