Ground Zero of Networking: Mastering OSI's Physical Layer 1

OSI Layer 1 comprises three sublayers: encoding, parallel to serial and amplifiers, LEDs, and lasers. Layer 1 pushes data to mind-blowing speeds of 20Tbps across ocean floors via fiber cables. New server NICs are pumping data at 200Gbps in data centers.

Layer 1 is where signals are impacted by NEXT (Near End Crosstalk) FEXT (Far End Crosstalk), reflection, refraction, dispersion, absorption, and attenuation just to name a few! More money is spent at Layer 1 than all other layers combined!

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[Derbauer]

This was mindblowingly informative. These deep dives are absolutely fascinating, please accept our sincere appreciation for the effort you have undertaken to further our understanding about these critical topics.

[docteurgreene]

I don't understand how someone can put a dislike on this video. This is HUGE work! I have some research to do related to WEP/WPA/WPA2 and I hope Lowell has made a video about this subject, this is my primary source of IT information on Youtube :)

[charlesdiscenza]

Mr. Vanderpool thanks so much you do a great job of communicating and using real world examples. I’ve learned so much more from you than I have for the courses I payed for. Thanks again for your work.

[toml]

Excellent resource for layer 1, thank you so much for such great quality video.

[mrfeli]

I'm watching your videos from France. Your videos always provide relevant content . Thanks !

[DosJof]

I've worked as a 'cable guy' in some pretty austere conditions in remote villages in Alaska and appreciate the complexities of layer 1. You have done an excellent job at presenting new and interesting information. I knew about the importance of clean FO connectors but never realized dirt could cause permanent damage to the connection. Just that new information and the detailed explanation as to the why made me want to return for more information. I'm a new fan of #techsavvyproductions.

[bjornroesbeke]

This was more detailed than a Cisco course i followed (in 2009)!

[chmod]

Gotta say thank you for making these videos. Clear, logical presentation, with the right amount of info. Thank you!

[khoato]

Thanks a lot sir. Your presentation is so helpful and interestingly fun to watch. It makes the subject much absorbable. I like your voice and humor style. Thanks again!

[franceleeparis]

Great, was looking for the first diagram everywhere.. your video was the first one that explained what I needed… respect..🙂

[abulaith]

Amazing video Mr V, you managed to teach an OLD IT dog a new trick, More of this amazing knowledge please. Best wishes.

[Schnitzerci]

I'm thinking of doing a fibre course, just to learn more stuff like this. Absolutely awesome delivery as always. Thank you and respect to all the fibre engineers carrying out quality assurance checks. I know first hand if the fibre isn't right, it wreaks havoc across network switches leaving IT with a bad reputation for no reason.

[Lao_Zi_]

omy gosh!! im so blessed to have come accross your channel. I love IT but recently i was feeling as if that passion was slightly missing from many channels which made it much less intresting that what all this truly is, when watching you though, i remember why im so passionate about this all. thanks mate. Il be sure to share and like your content, just subd

[franciscoalvarez]

I just want to congratulate your work. This was such an amazing and deep explanation of Layer 1. I learned so much with your video. Thanks for sharing all your knowledge. Greetings!

[mad]

I appreciate the orlando magic cup! go magic :)

[buckfush]

Wow this is amazing. Do you recommend any books on this subject? Thanks so much for this awesome video

[MrYayoperez]

Wonderfully made! The Lord has given you so much knowledge, brother. It's no doubt that we were made in the image of God. Thanks for those verses you display from time to time. God's Word does not return empty (Isaiah 55:11).

[zaur]

Thank you ! Really well explained in good detail!

[RoDrop]

Love your videos. Thanks for sharing.

[Sultan-xdzg]

Thanks Sir for such great video full of information.