The Collision Problem That Crippled Ethernet (And How We Solved It)

Ever wonder how computers actually talk to each other over a wire? In this episode of ScienceLive, we break it all down — starting with the earliest Ethernet networks running over coaxial cable, through the switch to Cat5 cabling, and into the fundamental building block of all network communication: the packet.

You’ll learn what packets are, how they carry your data across a network, and why early Ethernet had a serious flaw — data collisions that could bring an entire network to its knees. We explain why collisions happen and what they mean for the data you’re trying to send.

Then comes the part we’re most excited about: how my team and I discovered a solution to stop packet collisions entirely, leading to the invention of WideBand networking. In this episode we give you the teaser — next week, we’ll teach you exactly how it works.

This lesson is for anyone who wants to truly understand computer networking from the ground up — how Ethernet came about, how it works, and where it’s headed.

About DrB

Dr. Roger Billings is a visionary innovator whose work has touched the lives of millions of students and transformed the landscape of education. Widely known as “DrB” to the countless kids who benefit from his groundbreaking Acellus learning system, Dr. Billings has dedicated his life to advancing education through technology. As part of DrB’s lifelong commitment to supporting education, Science LIVE was launched as a way to “give back” by mentoring students in conjunction with the Roger Billings Scholarship Program.


Read more about DrB » 
About the Roger Billings Scholarship Program »

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5,043 Comments

  1. Skyla

    hey from Texas

    Reply
  2. Kai

    Dr. Billings, It is so crazy how many inventions of yours we are using to watch Science Live. You are blessing so many people with your inventions. Thank You!

    Reply
  3. Hunter

    Never knew there were different types of Ethernet!! That’s so cool!!!

    Reply
  4. Natalie

    Watching from SC!

    Reply
  5. Rylan

    hello from texas!

    Reply
  6. Joshua

    i love science live

    Reply
  7. Emmanuel

    Gigabit ethernet is interesting to learn about but I think its cool!

    Reply
  8. Marisol

    I can’t believe r-51 escaped again!

    Reply
  9. Grizzlydean

    Hello from MT!

    Reply
  10. Mializ

    Loving the lives!

    Reply
  11. Aiden

    Awesome live thank you!

    Reply
  12. Lyla

    Does fiber optic cable suffer from the same data collision issues as ethernet or coaxial cable?

    Reply
  13. Lilianis

    Hi from Tennessee

    Reply
  14. Kai

    Go for the gold!

    Reply
  15. Ella

    Hi! From South Dakota!!

    Reply
  16. Gabriel

    Why dose the circuit board that Mr John showed in the video have so many circles the cool it off, why can’t it just have a long bar that just cool every single one .

    Reply
  17. Jayden

    I love science live!!!

    Reply
  18. Rocio

    Hello from CT!

    Reply
  19. Abrial

    Watching from California!

    Reply
  20. Easton

    Science rocks!

    Reply
  21. Deonte

    Very interesting, Love it

    Reply
  22. Abigail

    Wow!! I never know this!! Acellus is great!

    Reply
  23. Gwendolyn

    This is so cool!

    Reply
    • Eric

      Wow!!! They ought to teach this in most schools!

      Reply
    • Kenyon

      This is cool.

      Reply
    • Oskar

      I like how I can rewatch the live later or if I miss it I can, thank you for doing this on youtube!

      Reply
    • Mikenna

      I love the science lives I can’t wait for the next one

      Reply
    • Kamryn

      I love science love!!!

      Reply
  24. Logan

    Good science live tonight.

    Reply
    • Kyndall

      hi from ohio!

      Reply
    • Adam

      Amazing effort this week!

      Reply
    • Kylee

      Hey, from va.

      Reply
    • Christian

      Loved this episode.

      Reply
  25. Joseph

    Hello from NY!

    Reply
    • Natalie

      Acellus rocks

      Reply
  26. Blake

    Hello from Massachusetts!

    Reply
    • Cole

      Very interesting!

      Reply
    • Saigon

      So amazing how he built it by scratch!

      Reply
      • Emily

        I know, right? I hope I can build something just how he did!

        Reply
  27. Khloe

    Why does gigabit Ethernet make video streaming faster than regular Ethernet?

    Reply
    • Ashlyn

      Wonderful live tonight

      Reply
  28. Briella

    This was great!!

    Reply
  29. Isidore

    Networking technology is very interesting.

    Reply
  30. Vanessa

    this is super fun

    Reply
  31. David

    I love scene live and I love inventing

    Reply
    • Paisley

      science live isss sooo fun

      Reply
  32. Brayden

    I love Sciencelive

    Reply
  33. Ashton

    Science Live Is Fun.l

    Reply
  34. Hannah

    Hi from Texas!!

    Reply
  35. Issac

    issac from MD

    Reply
  36. Naylynn

    The Ethernet is very interesting, and I would have never known about it if it was not covered here.

    Reply
  37. Jacob

    Awesome episode!

    Reply
    • Delilah

      I really appreciate the diagrams that are included in these lessons. They help me understand these topics so much easier.

      Reply
  38. Itai

    Love it

    Reply
  39. Athena

    When were cables first invented?

    Reply
  40. Zoey

    I think its really cool that you brought up Coax cable because I am a licensed Amateur Radio operator and we tend to use coaxial cable to connect an antenna to a base station. I also hope R-51 comes back soon, he’s definitely the life of the party on science live!

    Reply
  41. Rylee

    Love these videos

    Reply
  42. Christopher

    Hi from Chicago

    Reply
  43. Wesley

    hi from Connecticut

    Reply
  44. Huzaifah

    LOVE THIS VIDEO ..

    VERY INFORMATIVE

    Reply
  45. Ashtin

    Very interesting

    Reply
  46. Penelope

    Hi from South Carolina! !

    Reply
  47. Emily

    so fun !

    Reply
  48. Calvin

    I didn’t realize collisions could be avoided with ethernet. :o)

    Reply
  49. Emma

    I learned a lot from this science live.

    Reply
  50. Brennan

    love the baseball part

    Reply
  51. Kyla

    SAYING GOOD EVENING FROM OREGON

    Reply
  52. Nyia

    hello from VA! Do you think there are more things that can be done with the already existing ethernet technology?

    Reply
  53. Noah

    Wow! Ethernet sounds really cool!

    Reply
  54. Bailie

    i have ethernet!

    Reply
  55. Penelope

    Hi from South Carolina!!

    Reply
  56. Justin

    Wow that’s both really cool and crazy how it was once believed that streaming a video wasn’t even possible.

    Reply
  57. Breanna

    I love science live

    Reply
  58. Logan

    Awesome Science Live

    Reply
    • Shalym

      Hi from the Caribbean

      Reply
  59. Harlan

    Hi From Kentucky

    Reply
  60. Andrew

    Great episode tonight! Watching from Florida!

    Reply
  61. Siva

    hi from va

    Reply
  62. Aaron

    hello this is Aaron from Arkansas!! I learned so much from this first science live! My whole family watched it with me!!

    Reply
    • Sciencelive

      Happy Wednesday Aaron and family!! So glad to have you all here!

      Reply
  63. Elijah

    I learned about Ron Crane.

    Reply
  64. Mossaab

    So glad to this episode.

    Reply
  65. Savannah

    Hey this is Savannah from Texas and i love acellus

    Reply
  66. Evelyn

    Ethernet is so cool.

    Reply
  67. Savannah

    Hi from Arkansas!

    Reply
  68. Gillian

    Again, best of luck to everyone in the science fair!

    Reply
    • Sciencelive

      So excited to see all of our entries! Tune in at Acellus World to see our winners!!

      Reply
      • Abigail

        👍

        Reply
  69. Dahlia

    Tennessee here! absolutely love acellus!

    Reply
  70. Paila

    I’m so excited to learn!!!

    Reply
  71. Saarah

    Hi from NY, this is such a cool concept!

    Reply
  72. Lilly

    Awesome video today. I loved it so much!!!!🦋🦋🦋🦋🦋🦋💜💙❤❤💜💖💗💘💛💚💓😍🤍🧡🖤😻💞💕♥

    Reply
    • Sciencelive

      Thanks for tuning in Lilly!! 🔬💙

      Reply
  73. Romina

    Hello from Florida!

    Reply
  74. Aaliyah

    Hi From Texas. Love Science Live!

    Reply
  75. Eman

    Hi from sc

    Reply
  76. Miguel

    Hi from Maryland and happy Wednesday everyone!

    Reply
  77. Lyla

    Hello from Florida!

    Reply
  78. Hazel

    happy science live day!

    Reply
  79. William

    I have ethernet myself and it makes my wifi way faster.

    Reply
  80. Joey

    hey from texas

    Reply
  81. Skyler

    would you solve it the same way if it happened again?

    Reply
  82. Cooper

    I learn so much from this videos

    Reply
  83. Lainey

    love this!

    Reply
  84. Brantley

    Does fiber optic cable suffer from the same data collision issues as ethernet or coaxial cable?

    Reply
  85. Cooper

    Good evening from FL!

    Reply
  86. Noa

    Oh i’ve seen wires like that in my house and my grandpa was a engineer.

    Reply
  87. Regan

    excited to learn something in science live today

    Reply
  88. Adria

    hi from Ecuador!!

    Reply
  89. Olivia

    How can 1 billion bits per second work?!🤯

    Reply
  90. Max

    Hope everyone had a great holiday! Loved learning about Ethernet and how how it helps our technology.

    Reply
  91. Paz

    Science live is always so cool!

    Reply
  92. Charlie

    hello from omaha nebraska

    Reply
  93. Karlee

    love the videos!

    Reply
  94. Addison

    Do you think there is room for improvement for the ethernet?

    Reply
  95. Jade

    i like how they brought people who worked on ethernet i think that’s cool

    Reply
  96. Penelope

    This was very interesting! Thank you!

    Reply
  97. Enoch

    hello from texas

    Reply
  98. Ava

    hi from MN

    Reply
  99. Eli

    I never knew that’s how they did it

    Reply
  100. Axton

    Ethernet having 100 computers at the start to where we are now is bananas!

    Reply
  101. Alden

    hi from florda i love lives

    Reply
  102. Tucker

    I love you so much!

    Reply
  103. Diego

    Hii from Panama

    Reply
    • Sciencelive

      Hello Diego! Welcome, we are so happy to have you with us! 🔬

      Reply
  104. Mark

    Awesome!

    Reply
  105. Genevieve

    This is so cool, though! I don’t think I’ve ever heard of Ethernet before this! :0

    Reply
  106. Eliana

    Ethernet had lots of accidents before they fixed them and that’s cool. Area-51 was funny of course.

    Reply
    • Sciencelive

      R-51 always has something in store for us 😉

      Reply
  107. Sunnove

    I always love the personification of computers talking to each other!

    Reply
  108. Brealea

    This was so interesting I loved it

    Reply
  109. Benjamin

    As a kid using pc, ethernet is really important science live is so fun!

    Reply
  110. Madison

    How could he ever build something like that from scrach? Its amazing!!

    Reply
  111. Blake

    hi from colrado

    Reply
  112. Charli

    Hey from nc! great live tonight!

    Reply
  113. Ben

    Hello from Texas!

    Reply
  114. Lily

    Hello from Indiana

    Reply
  115. Dean

    This is so cool. I love science live. Quick question, where is Cody from the inventineers club I have’nt seen him in a while.

    Reply
    • Sciencelive

      Hello Dean, thank you for watching! The Inventioneers & Protégés will be back next week with more shenanigans 😉

      Reply
  116. Deepak

    I love science live

    Reply
  117. Sophia

    Great show!

    Reply
  118. Connor

    goooood job prodojs

    Reply
  119. Samuel

    love this live!!

    Reply
  120. Insha

    Hi from NC!!!

    Reply
  121. Justice

    this is fun

    Reply
  122. Gavin

    think this might be one of my fovorite

    Reply
  123. Ryder

    Hi from NC

    Reply
  124. Delaney

    Great science live!

    Reply
  125. Kekoa

    i like the video because it is cool

    Reply
  126. Jahkaveon

    Hi from St Louis

    Reply
  127. Sophia

    Hello from Montana! Great live!!

    Reply
  128. Declan

    So interesting to learn more about computer networks!

    Reply
  129. Rory

    Technology can be really amazing!!

    Reply
  130. Bentley

    Thank you for another amazing science live.

    Reply
  131. Eli

    Saying hi from Louisiana!

    Reply
  132. Viviana

    I enjoyed this live.

    Reply
  133. Ian

    Hi From New York

    Reply
  134. Kelen

    I’m glad that they figured out how to get computers to talk to each other.

    Reply
  135. Kellis

    Hi from NC!

    Reply
  136. Riley

    Ethernet is a really great thing

    Reply
  137. Prestyn

    Hi, i’m excited for todays episode!!

    Reply
  138. Zayda

    It’s incredible how Ron Crane got into M.I.T College and Stanford University! It’s also very interesting how he joined the Xerox company in 1974!

    Reply
  139. Rozalia

    the board was really intresting to me. thank you!

    Reply
  140. Lillie

    i love science

    Reply
    • Madison

      Science live is always interesting to watch.

      Reply
    • Sciencelive

      Science ROCKS!! 🔬🧬

      Reply
  141. Ashlyn

    I love science live!

    Reply
  142. Jennifer

    Hi from Mexico!! Love science live Wednesday .

    Reply
  143. Drako

    This was so helpful.

    Reply
  144. Camila

    Always love these! This video is a great look back at the ingenuity required to make Ethernet the standard it is today. The collision problem was a real hurdle, and it’s amazing to see how it was solved!

    Reply
  145. Elaine

    Acellus and Science Live is great!

    Reply
  146. Jailore

    This is such a cool topic! How did the engineers at Xerox decide between the 4 twisted cables and the star set-up after moving on from the straight line?

    Reply
  147. Edward

    Im really loving this

    Reply
  148. Garrett

    The Ethernet is so complicated.

    Reply
  149. Aubrey

    Love the live!

    Reply
  150. Hazel

    never heard about ethernet before, learning about it was so cool

    Reply
  151. Nivedita

    It would have been really fun and interesting to be one of the people who would hand soder the circuit boards together!

    Reply
  152. James

    early Ethernet had so many accidents before they were fixed.Amazing!

    Reply
  153. Rebecca

    Hello from Florida! 🙂

    Reply
  154. Quynh

    fun live

    Reply
  155. Auriel

    I never really thought about the ethernet being like a rats nest, but it kind of makes sense in a way oddly enough. The Ethernet is pretty complex when debugging it or checking for anything in general. Same with ethernet cords, most of the time when you see the cords they are almost always jumbled up in other cords.

    Reply
  156. Riley

    Hello from Florida

    Reply
  157. Brooklyn

    Hi from Alabama

    Reply
  158. Jade

    ethernet went through a lot before it was fixed

    Reply
  159. Jude

    How long does it take to fix an Ethernet collisions?

    Reply
  160. Aaden

    It was the miss click, cool I can’t believe so many people want to steal your ideas! You’re cool

    Reply
  161. Millicent

    Hello from texas

    Reply
  162. Keaton

    hi from sc

    Reply
  163. Kaydence

    Loved this!!!!

    Reply
  164. Benjamin

    Hello from GA

    Reply
  165. Brooklyn

    That’s such a cool way we come up with conclusions

    Reply
  166. Yuezes

    hi from ny!

    Reply
  167. Dawson

    hey everyone coming from Illinois I enjoy the science videos

    Reply
  168. Zoey

    Hiiiii from south Carolina

    Reply
  169. Sterling

    Cool info about Ethernet.

    Reply
  170. Keira

    i enjoyed this science live a lot, thank youu!

    Reply
  171. Joscelyn

    wow how cool!!

    Reply
  172. Mason

    Ethernet is so helpful!

    Reply
  173. Jayden

    Coming from Maine!

    Reply
  174. Emily

    Hi, from Mississippi!

    Reply
  175. Devin

    Hello from texas.

    Reply

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