Ethernet- IEEE 802.3

Ethernet- IEEE 802.3

IEEE 802.3 - Ethernet

It defines two categories.

1.    Base band: Base band uses the digital Manchester encoding technique.
2.    Broad Band

<Data Rate in Mbps><Signaling Method><Maximum Segment Length in 100 meters>

Example: 10BASE5

10 implies    - Data Rate 10Mbps

BASE implies - Signaling Method BASEBAND

5 implies -Maximum segment length =5*100 = 500meters

 Name                Cable                         Maximum segment Length
 10Base5       Thick Coaxial Cable  500m
 10Base2       Thin Coaxial Cable  200m
 10BaseT       Twisted Pair   100m
 10BaseF        Fiber Optic  2000m






Ethernet Properties

Ethernet LAN consists of coaxial cable called ether to which multiple computers connect.Ethernet is a bus network in which multiple computers share a single transmission media. While one computer transmits a frame to another, all other computers must wait.

Ethernet uses bus topology.

Ethernet offers connectionless communication.

Ethernet uses CSMA (Career sense multiple access) Access Method.
Advantages of Ethernet:

1.Low cost
2.Maintenance and administration simple
3.Ethernet cables are robust to noise, thus external disturbances are very less.

Disadvantages of Ethernet

1.As the load on Ethernet increases number of collision increases, therefore efficiency decreases.
2.Ethernet offers non-deterministic service, so it is not suitable for real time application.
3.No priority mechanism in Ethernet.
4.There is a restriction of minimum size of packet.