40 GIG a SECOND is INSANE I stand corrected 1.6 tbits is insane
@tdyrc2 ай бұрын
divide it by 8 and you get 200 gigabytes per second. This is madness o_o
@AdvaitaVedantaHUB9 ай бұрын
is it just me or are these videos amazing? thanks a lot for uploading
@bobanmilisavljevic785716 күн бұрын
These videos are amazing but maybe you are too!
@xk964264 Жыл бұрын
2 days left after 3 months of studies every day. 2 books and multiple sources
@hardtailfails Жыл бұрын
did you pass
@elnomade2686 ай бұрын
@@hardtailfails Did you survive the exam?
@hardtailfails6 ай бұрын
@@elnomade268 no wasn't able to pass it in not good at tests
@familyquinn16846 ай бұрын
I am about to go test right now and I dont feel confident.@hardtailfails
@hardtailfails6 ай бұрын
@@familyquinn1684 did you pay for the back up test voucher thing whatever they call it
@jameselrick66982 жыл бұрын
How important would you say memorizing ethernet standards would be toward the exam?
@trevincurrey6752 Жыл бұрын
They are all testable questions, so all of them.
@jonathanedge7945 Жыл бұрын
Look at the exam objectives and the way each knowledge section is weighted in the test. It’ll tell you exactly how many points you will gain or lose.
@froot3839 Жыл бұрын
Man no way I’m gonna remember all of them 😂
@rakanal.2925 Жыл бұрын
@@froot3839 you can just understand them know and memories them before the exam
@pawnshop_ghost Жыл бұрын
Commenting here means we're already in the process of watching a video that's less than 10 minutes long so we might as well watch it and remember as much as we can
@user-pg7ns4fw5e6 ай бұрын
5:35 When he says "Half-duplex goes 400meters while full-duplex goes 2kilometers" is half-duplex just mean single mode fiber and full duplex is Multimode fiber? from my understanding, Half-Duplex allows communication in both directions but not simultaneously. & Full-Duplex mode enables bidirectional communication.
@user-pg7ns4fw5e6 ай бұрын
nvm, I think I got it: Full Duplex: Talk and listen simultaneously. (you'd use two strands for full duplex in single-mode fiber(Because 1 strand is for sending, other 1 is for receiving), Unless your using WDM(Which lets data travel both ways by using different wavelengths, even on a single-mode fiber strand) Half Duplex: Take turns to talk and listen. (rare in fiber, common in WIFI 5 & below, & in old Ethernet devices like hubs) Simplex: Just one way. Like a megaphone, all talk, no listen.
@eliduman2322 Жыл бұрын
Most interesting unit so far
@bobanmilisavljevic785716 күн бұрын
That's what she said!! 😳
@slusheewolf21432 жыл бұрын
I'm thinking about that 1.6Tb/s connection. Like, GTA5 would install in a matter of seconds on Steam
@Duckathan Жыл бұрын
The fastest m.2 SSDs you can buy have read/write speeds of 7300 MB/s so that's what the speed would be for downloading not 1.6 Tb/s.
@joemassaroni8962 Жыл бұрын
You are thinking far to small. You could download the entire PlayStation 2 library in less than a minute!!!
@louisdiamond4177 ай бұрын
Thankyou professor you helped thankyou. God bless thankyou.
@abdallahelshuraydeh16972 жыл бұрын
How is multi-mode fiber associated with laser? I'm confused. Shouldn't it be single mode for laser and multi mode for light?
@professormesser2 жыл бұрын
Although it's common to see laser used with single mode fiber, there are some Ethernet standards that use laser light over multimode fiber.
@abdallahelshuraydeh16972 жыл бұрын
@@professormesser Thank you Professor :)
@hmmmmmok8 ай бұрын
How come with fiber, half-duplex has a shorter length span than full-duplex? I would've thought it would be the other way around.
@professormesser8 ай бұрын
With half-duplex, the length has to be limited so both sides can detect a collision when transmitting. If the distance is too long, a collision could occur after a device has completed their transmission so a backoff and retry would not be an option.
@hmmmmmok8 ай бұрын
@@professormesser Ooh ok, thank you very much!
@austin398332 жыл бұрын
Thank you!
@hannesblumel4292 жыл бұрын
What is the reason that for CAT8 the increase of bandwidth is just times 4 and not 10? Does that have any correlation with usb-c thunderbold 3 also having 40gb/s?
@professormesser2 жыл бұрын
Category 8 cable doesn't have a speed; it's just a cable. The standard of Ethernet is the 40GBASE-T standard, and it operates at 40 gigabits per second. The minimum cable required to run this standard is one constructed to the tolerances of the Category 8 specification.
@o0Dread0o Жыл бұрын
@@Distress. that's probably what people thought when 1000BASE-T was released
@BigRaj58092 жыл бұрын
You are amazing
@JuiceManTech Жыл бұрын
Awesome video as usual
@bsn5762 жыл бұрын
If I understand correctly, will ISP use a WDM Multiplexer and WDM Demultiplexer on a VPLS circuit? Since multiple companies get hosted on the same Fiber Link? Just trying to see if I understand the concept and see how it would be implemented in a real-world scenario. Thanks!
@epiclight858 Жыл бұрын
A company would normally be backed up by a secondary ISP circuit as a fail-over.
@energy98022 ай бұрын
I'm kind of confused about single mode and multimode, duplex, and BiDi. So single mode and multimode can both be either full, half, or simple duplex? And is BiDi just another way to say half duplex, or is BiDi full duplex over 1 strand? or is that something different? And is the WDM thing a standard or so for half duplex?
@TalsoJesus2 жыл бұрын
What type of cables does big companies use to provide internet to home, office, etc?
@SauceBossRickRoss2 жыл бұрын
I believe you are referencing coaxil cable- sometimes fiber
@walt_the_dolt11 ай бұрын
at 2:17 it says 100BASE-TX uses 2 pair cable. Yet it also says Cat 5 is the minimum cable requirement. Cat 5 uses the normal 4 pair contact. So if cat 5 is the minimum then wouldn't it be 4 pairs of cable? Also, another note, I think you should just put Cat 5e on the 1000BASE-T slide because Cat5 does not officially support 1gbps speeds on modern devices so it is a little confusing. Thank you for your videos!
@professormesser11 ай бұрын
The category of cable defines the physical characteristics of the cable, and the category type is not related to how many individual wires will be used by a particular network type. The IEEE 802.3 standard for 1000BASE-T sets the minimum cable type for the standard as Category 5.
@walt_the_dolt11 ай бұрын
@@professormesser ah okay. so even though the minimum requirement for 100BASE-TX is Cat 5, which has 4 pairs in it, the 100BASE-TX only uses 2 of those 4 pairs. Also, I understand your reasoning on the latter point as well. I have now been sent down a rabbit hole of what speeds and distances are actually possible over different Categories of cable and Bit Error Rate and stuff. Very interesting stuff. Thanks again for going out of your way to help others. I'm hoping to pass this exam soon 🤞