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What is Ethernet?

admin by admin
June 20, 2020
in Tổng Hợp
49
What is Ethernet?



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Have you heard of IEEE 802.3? It has a long history and has to do with our topic today, Ethernet.

Ethernet is a communication standard that was developed in the early ’80s to network computers and other devices in a local environment such as a home or a building.

This local environment is defined as a LAN (Local Area Network) and it connects multiple devices so that they can create, store and share information with others in the location.

Ethernet is a wired system that started with using coaxial cable and has successfully progressed to now using twisted pair copper wiring and fiber optic wiring.

Let’s break for a trivia question. Who invented twisted pair wiring?
Alexander Graham Bell invented twisted pair wiring in 1881.

In 1983, Ethernet was standardized into the standard IEEE 802.3 by the Institute of Electrical and Electronic Engineers (IEEE).

This standard defined the physical layer and the MAC (media access control) portion of the data link layer of wired Ethernet.
These two layers are defined as the first two layers in the OSI (Open Systems Interconnection) model
The “physical” layer consists of the following components: Cabling and Devices.

First, let’s take a look at Ethernet Cabling;
As stated previously, Ethernet cables come as coaxial cable, which is not very common except in older installations, twisted pair, and fiber optic.

The most common cable is twisted pair cables, with the latest being Category 6 with speeds up to 1 Gbps and Cat6a and Cat 7 with speeds up to 10 Gbps.

Category 5 and 5e cables are both still used in many existing applications but handle the lower speeds between 10 Mbps to 100 Mbps but are more susceptible to noise.

The Ethernet twisted pair utilizes RJ-45 eight-pin connectors at either end of the cable that is pinned for transmitting and receiving data in either half or full-duplex mode.

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Comments 49

  1. Azeem Ahammed says:
    1 year ago

    What about the length it can support?

    Reply
  2. candace june says:
    1 year ago

    great video thanks so much!

    Reply
  3. liqhters says:
    1 year ago

    what does the cable connect to, isn't there a box that it goes to like internet. I look up ethernet because I want to buy it and when I look it up it just shows cables??

    Reply
  4. dutchbagel says:
    1 year ago

    I knew most of this but didn’t know how it’s connected. Great video

    Reply
  5. Shaibul Hoque Mozumder says:
    1 year ago

    Thank you sir

    Reply
  6. Wolfie Playzzz says:
    1 year ago

    I have a question my laptop won't connect to ANY Wi-Fi even with the correct passwords because an ethernet cable can't be found? Would buying one help?

    Reply
  7. Dark ? says:
    1 year ago

    Again another error on CSMA/CD. At no time has Ethernet ever sent out a test bit listening for a collision. When the media is quiet it transmits the entire frame (not packet, which is an upper layer concept, frames are structured according to HDLC concepts).

    During that transmission it listens for a collision. In the original specification the medium was coaxial cable known as 10base500. Segments could be up to 500m in length and upto five segments in series could be connected via repeaters. This constituted a collision domain. The problem was that another remote device upto 2.5Km away could just start transmitting at the same time, the transit delay of both transmissions would take time before both frames collided, that collision then takes time to propagate back down the medium to be detected by the transmitting devices.

    The worse case scenario was that the frame has almost reach the remote device (2.5km away) when it decides to transmit. The remote device would detect the collision almost immediately, but the collision has to propagate back down the media to the originating device 2.5Km away. Therefore the frame had to be a minimum of 5Km long. The round trip time was about 51.2micro seconds, which resulted in a frame having a minimum size of 512bits (larger in later higher speed networks)

    The rule of CSMA/CD was listen to the medium, is there a transmission in progress, if yes wait. When medium is quiet transmit data, whilst transmitting continue listening for a collision. When transmission is finished stop listening.

    Reply
  8. Bina Shah says:
    1 year ago

    you earned a new subscriber!

    Reply
  9. Redfield 1337 says:
    1 year ago

    this is one of the best videos I have ever seen on youtube thanks for that!!!! Way to good!!!!

    Reply
  10. Jesus Ortega says:
    1 year ago

    Excellent explanation

    I would like to know what software was used to make these animations

    Reply
  11. Sabari Shri says:
    1 year ago

    Thank you

    Reply
  12. Anand Kumar Chauhan says:
    1 year ago

    Thank you sir

    Reply
  13. OpzsGamer II says:
    1 year ago

    Thx I didn't know it
    I asked a gamer
    How to play smoothly and no lag
    He replied
    Use ethernet cable
    Thanks to you I know now

    Reply
  14. C Dawg says:
    1 year ago

    Hey I know I’m a little late to this video and I might have missed it in the video but can is there a specific Ethernet cord I need depending on something in my pc or router or can I just get the fastest one?

    Reply
  15. ammajaan bawajaan says:
    1 year ago

    Good ……pls more videos upload

    Reply
  16. abdo mostafa says:
    1 year ago

    awesome explain

    Reply
  17. Ramesh Shinde says:
    1 year ago

    Nice presentation on Ethernet

    Reply
  18. امیر محمدی says:
    1 year ago

    very good

    Reply
  19. Flaming Moose says:
    1 year ago

    Thank you. I'm trying to get certified to work in networking and using a textbook alone has been rough, but with your videos and visuals everything comes together and makes way more sense.

    Reply
  20. missio dei dust says:
    1 year ago

    Nice, thank u sir.

    Reply
  21. Ankita Boruah says:
    1 year ago

    This video is so great! Very informative and the diagrams help in visualizing the things in our minds.

    Reply
  22. Salvation Jane says:
    1 year ago

    Great

    Reply
  23. Isdar Matori says:
    1 year ago

    Thank you very much from indonesia🙏

    Reply
  24. Alwin Solomon says:
    1 year ago

    WAN …. That is the story 4 another day 😻😻

    Reply
  25. Venkateswarlu Guntaka says:
    1 year ago

    ❤

    Reply
  26. Sandesh Sapkota says:
    1 year ago

    a lot of information in simple words.

    Reply
  27. Pure Dirt says:
    1 year ago

    thank u

    Reply
  28. Cândido Pereira says:
    1 year ago

    I know this protocol. It was a so much didactic explanation with a great animation. 🇧🇷

    Reply
  29. Alexsandro Souza says:
    1 year ago

    I'm from Brazil very incredible explanation, thank you so much, more one inscribe

    Reply
  30. ali taherkhani says:
    1 year ago

    you are unique REALPARS group

    Reply
  31. Murendeni Makhari says:
    1 year ago

    Well explained.

    Reply
  32. Bakary Sanneh says:
    1 year ago

    Waw! very useful video. Well done sir.

    Reply
  33. Roman GC says:
    1 year ago

    Thanks for information and want more videos

    Reply
  34. Dasus media says:
    1 year ago

    Thank you so much i need to learn more and more related to this

    Reply
  35. SMM says:
    1 year ago

    Good day

    Kindly why alot of videos not in paid account on realpars
    I already subscribed to annual plan but alot of videos not appear on my account and available for free on YouTube

    Reply
  36. Andor Gunczer says:
    1 year ago

    Wait,full duplex communication method doesn't use CSMA/CD anymore as it puts unnecessary load on the network.And without it, collisions cannot occur because the signals are running on different circuits (Devices "receive" on 1,2 and send on 3,6 for example).Tell me if I'm wrong it's just how I(!) know.

    Reply
  37. Rishi Singh says:
    1 year ago

    Very very informative

    Reply
  38. timothy kearns says:
    1 year ago

    Bell invented twisted-pair wiring to counteract capacitance found in non-twisted pairs. "Loading" coils were also added at pre-determined distances. XL and XC cancel themselves out in tuned (resonant) circuits, making the "load" purely resistive. Telephone lines weren't "resonant", but every little bit helped….oops…..XL and XC are inductive and capacitive reactance, respectively. If I've made any errors, please advise…….I retired almost 9-years ago, and my memory of such things is flagging.

    Reply
  39. madhusudhan skumbhashi says:
    1 year ago

    Its crisp and clear, thank you

    Reply
  40. intertan says:
    1 year ago

    wires, who wants wires. everything should be wireless these days.

    Reply
  41. Gururaj BN says:
    1 year ago

    Earlier, there was another technology for setting up lan called Arcnet. Is it totally gone now?

    Reply
  42. Linton Thomas says:
    1 year ago

    Hi can I connect an Ethernet gateway to a solid state state relay to turn it on or off from a computer or smartphone??

    Reply
  43. Md Abu Kowsar says:
    1 year ago

    What is the maximum distance ethernet to communicate local to remote hmi???

    Reply
  44. Yogesh Madaan says:
    1 year ago

    Excellent!

    Reply
  45. KimAnh Chung says:
    1 year ago

    Thanks

    Reply
  46. richard tetteh says:
    1 year ago

    Crystal clear. Thank you

    Reply
  47. sebastians schlechtes kanal says:
    1 year ago

    Is it just WiFi but not wireless?

    Reply
  48. Kyaw moe tun Kyaw says:
    1 year ago

    This is very explain think you, I'd like to Myanmar in say Mangalarpar channel

    Reply
  49. Cameron Herbst says:
    1 year ago

    wow I learnt more from this video than half a year of school, thanks man

    Reply

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