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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

    • XxSeBastiAnxX
      XxSeBastiAnxX

      Is it just WiFi but not wireless?

      about 6 hours ago
    • Kyaw moe tun Kyaw
      Kyaw moe tun Kyaw

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

      about 17 hours ago
    • f s
      f s

      Thank you

      about 2 days ago
    • RealPars
      RealPars In reply to f s

      You are very welcome!

      about 2 days ago
    • Cameron Herbst
      Cameron Herbst

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

      about 2 days ago
    • RealPars
      RealPars In reply to Cameron Herbst

      Great compliment! Thanks a lot!

      about 2 days ago
    • Dani Nsr-alah
      Dani Nsr-alah

      simply awesome video

      about 12 days ago
    • Jim b
      Jim b

      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.

      about 13 days ago
    • Sami Rahim
      Sami Rahim

      So thanks

      about 18 days ago
    • şakir dağ
      şakir dağ

      than you very much

      about 20 days ago
    • RealPars
      RealPars In reply to şakir dağ

      You are very welcome! Happy learning!

      about 20 days ago
    • Simon bpuk
      Simon bpuk

      There's a new kid on the block, CAT8, 2000MHz, 25Gbps or 40Gbps, Shielded only.

      about 21 day ago
    • Telco life
      Telco life

      Easy and precise information thank a lot

      about 21 day ago
    • RealPars
      RealPars In reply to Telco life

      Great to hear your positive feedback! Thanks a lot for sharing!

      about 20 days ago
    • Steven Steven
      Steven Steven

      I Real appreciate, it clear and understand ed one

      about 1 month ago
    • RealPars
      RealPars In reply to Steven Steven

      Great to hear that, Steven! Happy learning.

      about 1 month ago
    • Mongaldip Jana
      Mongaldip Jana

      Very good explanation.

      about 1 month ago
    • RealPars
      RealPars In reply to Mongaldip Jana

      Thanks a lot, Mongaldip!

      about 1 month ago
    • Afreen Yousaf
      Afreen Yousaf

      I thought i am the only one who study online :D :D LOL

      it does everbody

      about 1 month ago
    • Afreen Yousaf
      Afreen Yousaf In reply to Afreen Yousaf

      @thallapaku teja it means 😁😁this smiley

      about 1 month ago
    • thallapaku teja
      thallapaku teja In reply to Afreen Yousaf

      what is :D:D? please say

      about 1 month ago
    • Miles Bhattacharya
      Miles Bhattacharya

      Perfect. Just perfect explanation. Thank you so much!

      about 1 month ago
    • RealPars
      RealPars In reply to Miles Bhattacharya

      Thanks a lot for sharing your positive feedback with us, Miles! We really appreciate that.

      about 1 month ago
    • Shashank Thapa
      Shashank Thapa

      Ethernet in a nutshell and explained perfectly.I will surely recommend my college professors to watch your videos.

      about 1 month ago
    • RealPars
      RealPars In reply to Shashank Thapa

      Great to hear that, Shashank! Thanks for sharing!

      about 1 month ago
    • Deekshith Medikurthi
      Deekshith Medikurthi

      you just earned a subscriber!

      about 2 months ago
    • RealPars
      RealPars In reply to Deekshith Medikurthi

      Great to hear that you have joined the RealPars family! Let us know if you have any questions along the way.

      Happy learning!

      about 2 months ago
    • Tharageswari shanmugaraj
      Tharageswari shanmugaraj

      Hi.. guys pls make video of CAN bus and with arduino...
      Thank you😉

      about 2 months ago
    • RealPars
      RealPars In reply to Tharageswari shanmugaraj

      Thanks for the topic suggestion, Tharageswari! I will definitely go ahead and forward this to our creator team. Happy learning!

      about 2 months ago
    • Carlos Santos
      Carlos Santos

      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

      about 2 months ago
    • Scott Sommer
      Scott Sommer In reply to Carlos Santos

      This will depend on which S7-1200 variant you have, but in general, the iX T4A has an available ethernet port, four serial ports (RS-232/RS-422/RS-485) and 2 USB ports available. There is also an add-on CiX-DP module that will allow a ProfibusDP and MPI connection. You will need to select the correct connection type and install the correct driver in the iX software.

      about 2 months ago
    • Jawad Amir
      Jawad Amir

      great

      about 2 months ago
    • Amelia Sng
      Amelia Sng

      is switch a router?

      about 2 months ago
    • Amelia Sng
      Amelia Sng In reply to Amelia Sng

      RealPars understood! thank you

      about 2 months ago
    • RealPars
      RealPars In reply to Amelia Sng

      No. The most basic explanation is that a switch is designed to connect computers within a network, while a router is designed to connect multiple networks together. Most routers can act as switches, since they usually have multiple LAN ports and 1 or 2 WAN ports. My cable modem is a router which I use to connect to a different network (the internet provider) and to all of the devices in my home network. Switches, on the other hand are not usually equipped to act as routers, since they are limited in scope to what is connected locally to their LAN ports.

      about 2 months ago
    • kavin Xavier
      kavin Xavier

      All information in a nutshell.Very clear video summary.Thank you

      about 3 months ago
    • RealPars
      RealPars In reply to kavin Xavier

      You are very welcome, Kavin!

      about 3 months ago
    • Panzer Ace
      Panzer Ace

      Okay I might be an idiot for asking this, but does ethernet cost anything other then installation?

      about 3 months ago
    • RealPars
      RealPars In reply to Panzer Ace

      If the device already has a network interface card (NIC), then you just need to install an Ethernet cable and connect it to a switch, router, or gateway. There are no license fees or use fees associated with Ethernet. Of course there must be at least one other device on the network in order to send to or receive data from.

      about 3 months ago
    • omar shoman
      omar shoman

      What’s better; a Cat6 or a Cat7?

      about 3 months ago
    • Scott Sommer
      Scott Sommer In reply to omar shoman

      ​@omar shoman Just unnecessary. XBox cannot take advantage of the higher speed capabilities of CAT 7 cabling, because it is designed to run at 1 Gbps maximum speed, well within the range of CAT 6 (and CAT 5e, for that matter). CAT 6 cabling may give better performance than CAT 5e, but my older kids don't think that it does in practice. What I do know is many XBOX gamers complain about the upload and download speeds of the "gigabit port" on the XBOX getting only 150Mbps -250Mbps. Here is the secret: Ethernet interface ports like the one on the XBOX are rated for 10/100/1000 Mbps. As long as the interface can achieve > 100 Mps, they can advertise the capability as 1000 Mbps (gigabit). It is doubtful that without a very expensive dedicated connection through your internet provider that you could achieve speeds even close to 1 Gbps.

      about 3 months ago
    • omar shoman
      omar shoman In reply to omar shoman

      Scott Sommer so, it does no better than the Cat6, say for plugging it in to an Xbox One? Is it just unnecessary?

      about 3 months ago
    • Scott Sommer
      Scott Sommer In reply to omar shoman

      Cat6 wiring can support up to 10 Gbps and frequencies of up to 250 MHz. Cat7 can also support 10 Gbps, but laboratory testing has successfully shown its ability to transmit up to 40 Gb at 50 meters and even 100 Gb at 15 meters. The newer “Class F” cabling can support frequencies of up to 600 Mhz. That said, Cat7 has not been approved as a cable standard for telecommunications. I would only use Cat7 inside datacenters, since the additional shielding and increased number of cable "twists" make Cat7 cabling more expensive.

      about 3 months ago
    • Laszlo Zoltan
      Laszlo Zoltan

      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

      about 3 months ago
    • RealPars
      RealPars In reply to Laszlo Zoltan

      Luckily you have come across it now. Thanks for your comment! Happy learning.

      about 3 months ago
    • rulo antony
      rulo antony

      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

      about 3 months ago
    • RealPars
      RealPars In reply to rulo antony

      Thanks for your kind comment! I will definitely go ahead and forward this to our creator team. Happy learning!

      about 3 months ago
    • Harsh Sharma
      Harsh Sharma

      Sir is ip address is needed in ethernet

      about 4 months ago
    • Scott Sommer
      Scott Sommer In reply to Harsh Sharma

      Yes. In the IEEE 802.3 standard, the communication "stack" requires an IP address for routing of packets from sender to receiver. Ethernet also requires that each device also have a MAC address for identification.

      about 3 months ago
    • tony guillen
      tony guillen

      I don't skip adds in these videos just to help this guy

      about 4 months ago
    • RealPars
      RealPars In reply to tony guillen

      Thats really kind of you! Thank you!

      about 4 months ago
    • yousef hesham
      yousef hesham

      thank you very much
      ccna i have learned and you learned me so much
      from EGYPT

      about 4 months ago
    • RealPars
      RealPars In reply to yousef hesham

      You are very welcome! Happy learning.

      about 4 months ago
    • Varsha Jangra
      Varsha Jangra

      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

      about 4 months ago
    • RealPars
      RealPars In reply to Varsha Jangra

      Thanks for the suggestion! We currently only have English subtitles, but we will definitely keep that in mind.

      about 4 months ago
    • Dhinesh Dhinesh
      Dhinesh Dhinesh

      Super

      about 4 months ago
    • RealPars
      RealPars In reply to Dhinesh Dhinesh

      Thank you!

      about 4 months ago