Fast Ethernet is a standard that increases the data rate of standard Ethernet from 10 Mbps to 100 Mbps while maintaining compatibility through the use of auto-negotiation to allow devices to choose their mode and topology such as point-to-point or star connected through a hub or switch in the center to connect two or more stations.

2. • Fast Ethernet is an extension of the Standard
Ethernet.
• IEEE named fast ethernet as 802.3u.
• It is a LAN transmission standard that provides a
data rate of 100 mega bits per sec . That is 10
times faster rate than standard ethernet.

3. • Upgrade the data rate up to 100 Mbps.
• Make it compatible with Standard Ethernet.
• Keep the same 48-bit address.
• Keep the same frame format.
• Keep the same minimum 64 bytes and maximum
1518 bytes as frame lengths.

4. AUTO-NEGOTIATIONS:
•It allows a station to check a hubs capabilities.
•To allow one device to have multiple capabilities.
•Allow two devices to negotiate the mode or data
rate of operation.
•Allows incompatible devices to connect to one
another.

5. • Fast Ethernet adapter can be logically divided
into a MAC sub-layer and Physical layer.
• It runs on UTP data or optical fiber cable.

6. TOPOLOGY:
It is designed to connect two or more
stations together.
• point-to-point
• star topology ( with a hub or switch in center )

7. For star topology , there are 2 choices:
1.Half Duplex:
The station can either send or receive at a time.
The station are connected via Hub & uses CSMA/CD
2.Full Duplex:
The connection is made via a switch with buffer at each
port.
No collision ; CSMA /CD is not used.

8. THANK YOU