- What is Ethernet ? - ether means media and net means network .
Ethernet is a media for network to share the same bandwidth by all hosts on the networks.
Ethernet is popular because it is comparatively easy to integrate new technologies, such as fast ethernet, gigabit ethernet in to an existing network infrastructure.
- Relationship of ethernet with CSMA/CD
Ethernet uses Carrier Sense Multiple Access with Collision Detection (CSMA/CD), a protocol that helps devices share the bandwidth evenly without having two devices transmit at the same time on the network medium.
- How CSMA/CD works ?
When a host wants to transmit over the network, it first checks for the presense of a digital signal on the wire. If all is clear (no other host is transmitting), the host will then proceed with its transmission. But it doesn't stop there.
The transmitting host constantly monitors the wire, to make sure no other hosts begin transmitting. If the host detects another signal on the wire, it sends out a busy signal on the segment to stop sending data. The another host will now wait for a while.
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