1. Wired LANs and Ethernet
: Data Communication and Computer Networks
Asst. Prof. Chaiporn Jaikaeo, Ph.D.
Computer Engineering Department
Kasetsart University, Bangkok, Thailand
Adapted from lecture slides by Behrouz A. Forouzan
© The McGraw-Hill Companies, Inc. All rights reserved

2. Outline IEEE standards for LAN/MAN/WAN Traditional Ethernet
Unicast and multicast addresses
Fast Ethernet
Gigabit Ethernet
Ten-Gigabit Ethernet

3. IEEE Standards Project 802 E.g., http://en.wikipedia.org/wiki/IEEE_802
 standards for enabling intercommunication among equipment from a variety of manufacturers
E.g.,
IEEE  Ethernet
IEEE  Wireless LAN (Wi-Fi)
IEEE  Wireless PAN (Bluetooth, etc)

4. IEEE Standards for LANs

5. Logical Link Control Sublayer
Provides flow and error control for upper layer protocols
Most upper layer protocols (such as IP) do not require such services
DSAP – Destination Service Access Point
SSAP – Source Service Access Point
(Similar to TCP/IP ports)

6. Wired Ethernet
"Traditional" or "Original" Ethernet created at Xerox's Palo Alto Research Center (PARC) in 1976
Ethernet standards are set by IEEE working group

7. Standard Ethernet (10 Mbps)
Evolution of Ethernet
Ethernet Evolution
Standard Ethernet (10 Mbps)
Fast Ethernet (100 Mbps)
Gigabit Ethernet
Ten-Gigabit Ethernet
100-Gigabit Ethernet

8. IEEE MAC Frame

9. Min and Max Frame Length

10. Ethernet Addresses 48 bits (6 bytes) in length
Uniquely assigned to each Ethernet network interface card (NIC)
Usually written in hexadecimal notation
E.g.,

11. Unicast vs. Multicast Addresses
A unicast address defines one recipient
A multicast address defines a group of recipients
The broadcast address defines a group of all stations in the same LAN
A special case of multicast addresses
All bits are 1s

12. Example Define the type of the following destination addresses:
4A:30:10:21:10:1A
47:20:1B:2E:08:EE
FF:FF:FF:FF:FF:FF

13. Standard Ethernet

14. Categories of Standard Ethernet

15. Encoding in Standard Ethernet

16. 10Base5 Implementation

17. 10Base2 Implementation

18. 10Base-T Implementation
CAT3 Cable

19. 10Base-F Implementation

20. Standard Ethernet Summary

21. Raising the Bandwidth

22. Bridged Ethernet A bridge divides a network into two or more segments
Each segment is independent of one another, bandwidth-wise

23. Collision Domain
Bridges help split collision domain into smaller ones

24. Switched Ethernet

25. Full-Duplex Ethernet

26. Fast Ethernet

27. Fast Ethernet Data rate: 100 Mbps Standard  IEEE 802.3u
Backward-compatible with Standard Ethernet

28. Fast Ethernet Topologies

29. Fast Ethernet Implementations

30. Encoding for 100Base-FX

31. Encoding for 100Base-FX

32. Encoding for 100Base-T4

33. Fast Ethernet Summary

34. Gigabit Ethernet

35. Gigabit Ethernet
1000 Mbps
Standard  IEEE 802.3z, 802.3ab

36. Gigabit Ethernet Encoding

37. 4D-PAM5 Encoding
Used in 1000Base-T

38. Gigabit Ethernet Summary

39. 10-Gigabit and Up IEEE Standards 802.3ae  10GbE over fiber
802.3ak  10GbE over twin axial cable (10GBASE-CX4)
802.3an  10GbE over UTP (10GBASE-T)
802.3ba  40GbE and 100GbE