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Ethernet Networking

18 October 2009 Written by: 9 Comments

The original Ethernet was developed as an experimental coaxial cable network in the 1970s by Xerox Corporation to operate with a data rate of 3 Mbps using a carrier sense multiple access collision detect (CSMA/CD) protocol for LANs with sporadic but occasionally heavy traffic requirements.

Ethernet

Ethernet

Ethernet Working:

Ethernet is a connection media access method that allows all hosts on a network to share the same bandwidth [communication expressed in bit/s or Kbit/Mbit/sec] of link.
Ethernet is popular because it’s readily scalable, meaning that it’s comparatively easy to integrate new technologies such as:-


1:- 10 mbps – 10 base2 T Ethernet
2:- 100 mbps – Fast Ethernet
3:- 1000 mbps- Gigabit Ethernet

1:- 10 mbps – 10 base2 T Ethernet:

In 1990s 10Base2 was popular Ethernet Technology. The “10” in 10Base2 is stands for “10mbps”; the 2 stands for “200 meters,” which is the approximate maximum distance between any two nodes without repeaters between them.
The physical media is used to connect the nodes is thin coaxial cable.

10 mbps ethernet

10 mbps ethernet

2: 100 Mbps -Fast Ethernet:

The 100BaseT Ethernet transmits at 100 mbps. 100BaseT is also called “Fast Ethernet” and “100 mbps Ethernet”. Both 10BaseT and 100BaseT use star topology. The “T” in both 10BaseT and 100BaseT is stands for twisted pair.
We briefly mention at this point that both 10 Mbps and 100 Mbps Ethernet technologies can employ fiber links.
The IEEE 802 standards permit a LAN to have a larger geographical reach when fiber is used to connect backbone nodes.Wifi Routers is use this technology.

100 mbps ethernet

100 mbps ethernet

3: 1000 Mbps-Ethernet:

Gigabit Ethernet is highly successful Ethernet Standards. Offering a raw data rate of 1000 Mbps. Gigabit Ethernet maintains full capability with the huge installed base of Ethernet equipment. The standards for Gigabit Ethernet, referred to as IEEE 802.3z and does the following:–

A.) Uses the standards Ethernet frame format and is backward compatible with 10 and 100 mbps Technologies.
B.) Allows for point to point links as well as shared broadcast channel.
C.) Uses CSMA/CD for shared broadcast channels.

1000 mbps ethernet

1000 mbps ethernet

CSMA/CD: –

Ethernet networking uses Carrier Sense Multiple Access With Collision Detection (CSMA/CD).
A protocol that helps devices share the bandwidth evently without having two devices transmit at the same time on the network medium.

When the collision occurs on the Ethernet LAN:-

1: A jam signal informs all devices that a collision occurred.
2: The collision invokes a random backoff algorithm.
3: Each device on the Ethernet segment stops Transmitting for a short time until the Times Expire.
4: All hosts have equal priority to transmit after the timers expired.

Half-Duplex Ethernet:

Half Duplex Ethernet is defined in the original 802.3 Ethernet; Cisco says it uses only one wire pair with a digital signal running in both directions on the wire.

Full- Duplex Ethernet:

Full Duplex uses two pairs of wires. Full Duplex uses a point to point connection between the transmitter of the transmitting device and the receiver of the receiving device.

full-half duplex

full-half duplex

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9 Comments »

  • PattunnaRajam said:

    Sir,
    I done my M.E P roject in Ethernet MAC Transmitter using semicustom asic design.

    your website is more helpful and userfriendly.

    i need latest updates in the topic Ethernet,which will bw useful for me to undergo PhD.

    Thanks in Advance

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    do you guys think they will upgrade this product to a better one ?

  • Mike said:

    this is great! thanks

  • kidstoytoplay said:

    Wow, very Thank for post

  • Sunil said:

    Sir,
    i like your post, it gives good knowledge and basic concepts about the Ethernet Technology.

  • Gel Fuel said:

    ethernet cables are still the ones that i use for my home networking applications .,.

  • Soap Dispenser said:

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  • Lilla said:

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