Have you heard of IEEE 802.3? It has a long history and has to
do with our topic today, Ethernet. before we get started on today’s video if you love our videos, be sure to click the
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notifications of new RealPars videos. This way you never
miss another one! 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. Half-duplex transmits data
in one direction at a time while “full-duplex” allows
data to be transmitted in both directions
at the same time. Full-duplex in Ethernet can be
achieved by using two pairs of wires to allow data to travel both
directions simultaneously. Fiber optic cable uses glass
or plastic optical fiber as a conduit for light
pulses to transmit data. It has allowed Ethernet to travel
farther distances at higher speeds. Fiber optic cables use several
different types of connectors that vary depending on
your application needs. Some of the different types are SFP (Small Form Pluggable or
Small Factor Pluggable) and SC (Subscriber Connector, also known as
Square Connector or Standard Connector). In order to use fiber optic
in an Ethernet network that utilizes twisted
pair Ethernet cabling, you need to use an Ethernet
to fiber converter that will allow your network to take advantage
of the higher speeds of fiber optic and lengthen the distance that
the Ethernet network can reach. How about the Ethernet devices? Ethernet devices are
consist of computers, printers or any device which
either have an internal NIC (Network Interface Card) or an external one that
is USB or PCI based. “Switches” and “Routers” that act
as the director of the network and connect multiple computers or even networks together
to enable communication between all the different devices. “Gateways” or “Bridges” are used to connect
multiple Ethernet networks together and allow communication
across them. Gateways connect two
dissimilar networks together while a bridge connects two
similar networks together so that you only see one network. Now that we have discussed the basic
physical components of Ethernet, let’s move into the second layer of
the OSI model, the “data link” layer. The data link layer can be
split into two sections; the Logical Link Control (LLC) and the Media Access Control (MAC). The Logical Link Control
establishes paths for data on the Ethernet to
transmit between devices. The Media Access Control
uses hardware addresses that are assigned to Network
Interface Cards (NIC) to identify a specific
computer or device to show the source and destination
of data transmissions. Ethernet transmits data packets
in this data link layer by using an algorithm called CSMA/CD (Carrier Sense Multiple Access
with Collision Detection). CSMA/CD is used as a
standard for Ethernet to reduce data collisions and increase
successful data transmission. The algorithm first checks to see
if there is traffic on the network. If it does not find any, it will send out the first bit of information
to see if a collision will occur. If this first bit is successful, then it will send out the other bits
while still testing for collisions. If a collision occurs, the algorithm
calculates a waiting time and then starts the
process all over again until the full
transmission is complete. When you use the faster
Ethernets in full-duplex modes and incorporate switches, then you are utilizing
a star topology between the switch
ports and the devices. This allows for more direct
transmission paths and fewer collisions as compared to a bus topology where
all devices share the same paths. Ethernet capabilities are quickly changing
with new technologies emerging every day. And while we are currently on the brink
of successfully moving into speeds higher than the current 1 Gbps with 10 Gbps
emerging over the last few years, these new Ethernet
technologies will be costly. Also, your possibilities
for the information world can seem endless when you connect
this Ethernet local area network to the internet to create a very
large WAN (Wide Area Network). But that is a story for another day. All in all, Ethernet is popular because it strikes a good
balance between speed, cost, and ease of installation. These benefits, combined with wide
acceptance in the computer marketplace and the ability to support virtually
all popular network protocols. Want to learn PLC programming
in an easy to understand format and take your career
to the next level? Head on over to realpars.com

What is Ethernet?

84 thoughts on “What is Ethernet?

  • January 14, 2019 at 2:06 pm
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    Informative it is.

    Reply
  • January 14, 2019 at 2:15 pm
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    Can we connect profibus cable to ethernet??

    Reply
  • January 14, 2019 at 2:28 pm
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    I paused the video, Liked it and started writing my comment about how good, detailed and informative this video is even before halfway of the video. We know all these jargons but tend to misuse them. Thanks to realpars we are getting a proper schooling. I'm now going to continue watching the rest of this video. Thanks www.realpars.com

    Reply
  • January 14, 2019 at 2:31 pm
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    Great video

    Reply
  • January 14, 2019 at 2:33 pm
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    solid information

    Reply
  • January 14, 2019 at 2:37 pm
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    realpars really useful keep it we waiting for lot learning from your chsnnel👏

    Reply
  • January 14, 2019 at 6:10 pm
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    Thank you for the video ! We learn so much with RealPars, Keep up the good work please 🙂

    Reply
  • January 14, 2019 at 6:53 pm
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    Want video on programmable automation controller(PAC)…This one is as expected good

    Reply
  • January 14, 2019 at 8:28 pm
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    Loving the Diversified approach to industrial automation technology !

    Reply
  • January 14, 2019 at 9:30 pm
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    winderful as usual, very informative and deeply explained, thank you

    Reply
  • January 15, 2019 at 4:18 am
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    thanks for your videos, those are very useful to learn about automation

    Reply
  • January 15, 2019 at 9:45 am
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    Thank you Realpar team. You're really making impact !!!!! More strength !!!!

    Reply
  • January 15, 2019 at 12:37 pm
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    That´s why I recommend your videos, they really leave upstanding information on us. Keep doing your great job!!!

    Reply
  • January 15, 2019 at 1:37 pm
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    Hi, Thank you for your information. I have confusion about Profinet, EtherCAT, Sercos…Do they use Ethernet as physical layer? And only change the protocol?

    Reply
  • January 18, 2019 at 4:09 pm
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    Hello Real Pars!!..
    I am very much thankful for all your videos.
    Kindly upload some more Industrial Communication Systems. Also PL make some videos on OPC AE and OPC DA System in details with example.
    Also how we can communicate external world with DCS/SCADA System.
    once again thanks…!!

    Reply
  • January 18, 2019 at 11:03 pm
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    Could you add a video about ups (uninterruptible power supply)?

    Reply
  • January 19, 2019 at 5:38 am
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    One more Simple and detailed Video from you all, Thanks for serving the best always…

    Reply
  • January 20, 2019 at 6:50 am
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    thank you

    Reply
  • January 20, 2019 at 12:49 pm
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    Good work

    Reply
  • January 20, 2019 at 3:49 pm
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    Thank you sir 🙏

    Reply
  • January 25, 2019 at 9:34 pm
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    Make videos on testing fibre optic cable such as OM3 or OS2 and how to calculate Power loss budgets , insertion loss and return loss etc

    Reply
  • January 27, 2019 at 5:44 pm
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    This world has 5 elements Fire, Earth, Air, Water and Internet!

    Reply
  • January 28, 2019 at 4:33 pm
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    Thank you. Pls more content

    Reply
  • February 3, 2019 at 12:19 am
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    Excuse me realpars. You are right cat5 cables are rated for 10 to 100 Mbps BUT cat5e can handle 1gigabit. But you are right about cat5/5e being susceptible to interference.

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  • February 3, 2019 at 3:23 pm
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    EPIC !!! simple condensed and covered every aspect of Ethernet

    Reply
  • February 5, 2019 at 10:28 am
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    thank u

    Reply
  • February 6, 2019 at 8:32 am
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    Thank you very much

    Reply
  • February 8, 2019 at 2:14 pm
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    This is very useful for my polytechnic engineering research work. Thanks alot guys!

    Reply
  • February 9, 2019 at 11:24 am
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    You know, computer scientists are used to handle the magical "Ether", the 5th element, as a physical substance through which electromagnetic energy must travel. The Ethernet, Ethereum, etc. It allows us to connect to a network.

    Reply
  • February 9, 2019 at 1:25 pm
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    thanks

    Reply
  • February 13, 2019 at 10:37 am
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    thanks a lot

    Reply
  • February 20, 2019 at 10:32 pm
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    Thanks to this video, I could easily understand this topic

    Reply
  • February 22, 2019 at 10:59 am
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    I learned both Network and English
    Your talking pace and pronunciation are perfect for me(japanese)

    Reply
  • February 24, 2019 at 7:50 am
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    👍

    Reply
  • February 24, 2019 at 4:50 pm
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    Very useful video. Thank you for that

    Reply
  • February 25, 2019 at 11:14 am
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    Thx for the videos. Well done. Very useful. Keep going👍✔

    Reply
  • March 7, 2019 at 11:44 am
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    😉😉

    Reply
  • March 8, 2019 at 5:53 pm
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    How much is the maximum length we can use for ethernet cable

    Reply
  • March 9, 2019 at 3:38 pm
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    good reviw . thank you.

    Reply
  • March 11, 2019 at 1:39 am
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    Could you please tell me the relationship between BSC and MSC?

    Reply
  • March 11, 2019 at 3:56 am
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    good images, good animations, clear voice, informative explanation. I honestly do not know what else you can do to make this video better

    Reply
  • April 2, 2019 at 5:26 pm
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    A couple things:
    1. As others have said, cat 5e can be used for 1 Gbps speeds.
    2. CSMA/CD is no longer needed for full-duplex switched networks, each link is isolated and collisions are eliminated. Indeed, half-duplex links are no longer specified in 1 Gbps Ethernet, and aren't allowed at all in 10 Gbps. 802.11 Wifi does have collision issues due to its half-duplex nature, but it uses a related CSMA/Collision Avoidance method instead.

    Reply
  • April 3, 2019 at 2:48 am
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    Ethernet is ALSO very popular for two more reasons. Better security than Wi-Fi, and inherently, no associated noise interference from other transmitters, devices, and appliances.

    Reply
  • April 7, 2019 at 6:37 pm
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    Very well explained, thank you for all the work you put into this video. 👍

    Reply
  • April 10, 2019 at 3:18 am
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    Thanks

    Reply
  • April 15, 2019 at 4:32 pm
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    Great information..#HariKrishnaSahu

    Reply
  • April 17, 2019 at 12:43 pm
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    Can we do ethernet communication betwen siemens s200 and scada system without internet ?

    Reply
  • April 23, 2019 at 3:58 pm
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    Thank you for Sharing!
    Finally I can explain what the ethernet is.
    👍THUMBS UP👍

    Reply
  • April 25, 2019 at 2:47 pm
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    Always a great video's from RealPars…
    Visualisations are awesome..
    Cleared all queries about topics..
    Thank you so much..

    Reply
  • May 1, 2019 at 3:27 am
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    What is internet? You ask. It's the gateway for the deep state to stalk people.

    Reply
  • May 2, 2019 at 9:19 am
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    What software that you use to created this cool video?

    Reply
  • May 9, 2019 at 7:30 am
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    Super

    Reply
  • May 13, 2019 at 2:19 am
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    dear sir your all vedio fully helpful for me but i request you to that please make vedio also hindi language..u can give me option to select hindi language

    Reply
  • May 16, 2019 at 7:55 am
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    thank you very much
    ccna i have learned and you learned me so much
    from EGYPT

    Reply
  • May 22, 2019 at 1:44 pm
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    I don't skip adds in these videos just to help this guy

    Reply
  • May 23, 2019 at 3:04 pm
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    Sir is ip address is needed in ethernet

    Reply
  • May 28, 2019 at 3:42 am
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    Hi, I think your chanel is EXCELENT¡¡ Thanks for make this tuttorials, ….I have a suggest …..can you please talk about " TSN Time Sensitive Networking" I´m very confused about it…… regards from MEXICO

    Reply
  • June 6, 2019 at 7:00 pm
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    I wish I had seen this video ages ago before tearing my hair out for days while setting up my asus router- not many home consumers have had the benefit of any technical training, while many troubleshooting links proved to be information-runarounds.
    good job on clarity

    Reply
  • June 11, 2019 at 6:43 am
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    What’s better; a Cat6 or a Cat7?

    Reply
  • June 16, 2019 at 9:22 pm
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    Okay I might be an idiot for asking this, but does ethernet cost anything other then installation?

    Reply
  • June 17, 2019 at 1:06 am
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    All information in a nutshell.Very clear video summary.Thank you

    Reply
  • July 1, 2019 at 1:19 pm
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    is switch a router?

    Reply
  • July 20, 2019 at 10:39 am
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    Hélio, thanks for all vídeos. They are very great.
    The question is: how can comunicate a plc Siemens s71200 Wish a beijer exter t4a?
    Thnks very much

    Reply
  • July 22, 2019 at 2:13 am
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    Hi.. guys pls make video of CAN bus and with arduino…
    Thank you😉

    Reply
  • July 22, 2019 at 2:35 am
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    you just earned a subscriber!

    Reply
  • July 30, 2019 at 4:36 pm
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    Ethernet in a nutshell and explained perfectly.I will surely recommend my college professors to watch your videos.

    Reply
  • August 1, 2019 at 5:06 am
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    Perfect. Just perfect explanation. Thank you so much!

    Reply
  • August 1, 2019 at 8:19 pm
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    I thought i am the only one who study online 😀 😀 LOL

    it does everbody

    Reply
  • August 5, 2019 at 2:48 am
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    Very good explanation.

    Reply
  • August 21, 2019 at 11:32 am
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    I Real appreciate, it clear and understand ed one

    Reply
  • August 31, 2019 at 7:08 am
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    Easy and precise information thank a lot

    Reply
  • August 31, 2019 at 2:33 pm
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    There's a new kid on the block, CAT8, 2000MHz, 25Gbps or 40Gbps, Shielded only.

    Reply
  • September 1, 2019 at 12:17 pm
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    than you very much

    Reply
  • September 3, 2019 at 9:32 pm
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    So thanks

    Reply
  • September 9, 2019 at 12:00 am
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    35+ years ago, "Ethernet" ran over a thick coaxial cable that many devices could daisy-chain over. Not an 8-wire twisted pair. No longer.

    Reply
  • September 9, 2019 at 7:13 pm
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    simply awesome video

    Reply
  • September 19, 2019 at 10:41 am
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    wow I learnt more from this video than half a year of school, thanks man

    Reply
  • September 21, 2019 at 8:48 am
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    This is very explain think you, I'd like to Myanmar in say Mangalarpar channel

    Reply
  • September 21, 2019 at 7:39 pm
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    Is it just WiFi but not wireless?

    Reply
  • October 8, 2019 at 10:31 am
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    Crystal clear. Thank you

    Reply
  • October 20, 2019 at 10:49 pm
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    Thanks

    Reply
  • October 21, 2019 at 8:06 pm
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    Excellent!

    Reply
  • November 5, 2019 at 3:23 am
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    What is the maximum distance ethernet to communicate local to remote hmi???

    Reply

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