Ethernet was first created by Robert Metcalfe and standardized by IEEE as 802.3. Fast Ethernet (802.3u) transmitted data 10 times faster than standard Ethernet at 100 Mbps while still being backward compatible. Gigabit Ethernet (802.3z) further increased speed to 1000 Mbps and supported full duplex between computers and switches or half duplex between computers and hubs using CSMA/CD. Switched Ethernet uses switches containing plug-in cards to reduce collisions by separating collision domains and allowing parallel transmission between cards.

1. ETHERNET-BY 09BIT059(MIHIKA SHAH)

2. ETHERNETFirstly created by Robert Metcalfe

3. Known as DIX ethernet

4. IEEE standardized 802.3

5. Uses manchester encoding

6. Ethernet framing

7. CSMA/CD algorithm

8. FAST ETHERNET (802.3u)Fast Ethernet was designed to compete with LAN protocols such as FDDI (Fiber Distributed Data Interface) or Fiber Channel.

9. IEEE created Fast Ethernet under the name 802.3u.

10. Fast Ethernet is backward-compatible with Standard Ethernet, but it can transmit data 10 times faster at a rate of 100 Mbps. Fast Ethernet Topology

11. Fast Ethernet Implementation

12. Bit rate is reduced to 10 ns from 100 ns.GIGABIT ETHERNET (802.3z)The need for higher data rate resulted in the design of the Gigabit Ethernet (1000 Mbps).

13. The IEEE committee calls the standard 802.3z.All configurations of gigabit Ethernet are point to point.

14. Point-to-point, between two computers or one computer – to –switch.

15. It supports two different modes of operation: full duplex mode and half duplex mode.

16. full duplex is used when computers are connected by a switch.

17. No collision, CSMA/CD isnot used.

18. Half duplex is used when computers are connected by a hub.