The Data Link Layer, MAC Addressing, and the Ethernet Frame

Рет қаралды 98,688

4 жыл бұрын

A short presentation on the Data Link Layer, the LLC and MAC sublayers, the structure of MAC addressing, and the structure of an Ethernet Frame. Here is the link to the slides: drive.google.com/open?id=19vn...

Пікірлер: 65

@BijouBakson 4 жыл бұрын

This is probably the most detailed course on the subject that I have seen yet

@danielschiffers9696 2 жыл бұрын

I love your video's! To the point, detailed and fun to watch.

@iwktwom 3 жыл бұрын

A uni exam tomorrow and this is fantastic, thanks for the brilliant content.

@republicgreenfather3068 3 жыл бұрын

Excellent Sir, I never seen such a wonderful Explanation with Best Presentation.Thank you Sir Great Job

@steveromanchuk4966 2 жыл бұрын

I love it, the best explanation of the Data Link layer I've ever seen!

@zafranullah8328 4 жыл бұрын

Very detailed and brilliantly explained.

@Hypocrisy.Allergic 3 жыл бұрын

this is the course for the curious guys who really want to handle all the info, i love it, even though it s a bit too advanced, i find it challenging

@zulauk Жыл бұрын

Wow this is the best way I've ever heard this explained, thanks for such a well thought out video.

@mantid83 Жыл бұрын

Going to watch all your videos. So detailed and I needed it badly!

@Charles-xd6lw 4 жыл бұрын

Excellent video. Thanks. I love your work.

@SixAstron 6 ай бұрын

Very well structured and presented. Thank you

@dkmpala1835 3 жыл бұрын

Thanks for the video, found it very easy to follow.

@Benadamsonn 3 жыл бұрын

Great and amazing explanation, well done danscourse

@dannyuwu3741 Жыл бұрын

Great video! I used it to review for my networking exam. Keep it up!

@judeleon8485 3 жыл бұрын

This is marvelous, well explained

@petersu4869 3 жыл бұрын

Bravo, excellent explanation of data link layer

@hawkeye4659 3 жыл бұрын

Thank you for your hard work.

@dave1b 3 жыл бұрын

Thanks a lot. Great video!

@Olavotemrazaodenovo 3 жыл бұрын

Congratulations from Brazil.

@majiddehbi9186 4 жыл бұрын

very interesting and Clair thx

@Limegreenslice Жыл бұрын

Great and very informative video!!

@ye_nope 4 жыл бұрын

Thanks again !

@ninjahunter2199 4 жыл бұрын

dd an exam u helped me nail it..thnk u

@bernardgarrett3897 3 күн бұрын

I just want to add the 3 in 802.3 came from the fact that the guys from Digital Intel and Xerox were sitting at Table 3 of a restaurant (the Wagon Wheel) in San Jose, when they came up for the specification. The rest is history.

@KirinChan1998 3 жыл бұрын

yessirrrrr!!! Thanks for this.

@zachfenton608 2 жыл бұрын

This is awesome thanks

@James_Knott Жыл бұрын

The preamble is used only on 10 Mb. On 100 Mb and faster, a different coding method is used and some reserved symbols are used to delimit the frames. Same with the inter-packet gap. Also, frames are no longer limited to 1500 bytes. That's an artifact of the original Ethernet and then by 802.3 using the Ethertype field for length. With DIX ll, it's Ethertype. Frame expansion appeared in the late 90s and now, with jumbo frames, 16K can be used, IIRC. You could have mentioned that if Ethertype/length is 1500 or less, it's an 803.2 frame and 1536 or greater for DIX ll. IP uses DIX and about the only thing that currently uses 802.3 is spanning tree. Other protocols that used to use it are now obsolete. A good reference is Ethernet The Definitive Guide, from O'Reilly and, for a bit of history, you might want to download the Ethernet Blue Book (Gordon Bell), which goes into the original DIX protocol, before DIX ll & 802.3.

@Parkhill57 Жыл бұрын

So basically, this video is completely obsolete.

@James_Knott Жыл бұрын

@@Parkhill57 Well, not completely obsolete, but a lot has changed.

@freddyhardware840 9 ай бұрын

@@James_Knott I hope someone like yourself or the original creator of this video will explain it with updated info. I have a logistics background and would understand things better if explained in logistics form.

@James_Knott 9 ай бұрын

@@freddyhardware840 I'm really not sure what you're asking for or how logistics would apply

@franchise2570 5 ай бұрын

Are you sure about this? The preamble isn’t part of the frame, but has always been used to indicate the start of the frame for synchronization. No where have I heard or read that this has changed, for Ethernet II or 802.3. If so please provide proof.

@gullejannat6756 4 жыл бұрын

hey, did you guide me if there are 1510 bits to be sent over ethernet how many would it take? 2?

@samucancld 2 жыл бұрын

Buenísimo loko

@ahmadullahazizi3038 4 жыл бұрын

Are these videos in this playlist are updated? I means CCNA 200-301?

@robertolin4568 3 жыл бұрын

Doesn't CD in CSMA/CD mean Collision Detection (instead of Collision Recovery shown in the first slide) ?

@mosabkhedeer7694 2 жыл бұрын

Good job thank you

@narfastaroth2320 3 жыл бұрын

Gracias!!

@milotxh 4 жыл бұрын

love your video's do u have any online classes for CCNA am working on my rectification

@olekristianrannekleiv762 3 жыл бұрын

is frames made before flow control at the data link layer?

@danielnyman2656 2 жыл бұрын

I understand that VLAN-tagging (TPID + PCP + DEI + VID) is inserted before the EtherType field, but can someone explain when “0x8100 VLAN-tagged frame” is used in EtherType field?

@Hypocrisy.Allergic 2 жыл бұрын

it is used when you have multiple vlans, if you have only the default vlan it is assumed all the frames go to the default vlan, when you enter the comman encapsulaion dot1q :vlan number: command it is when you basically tell that subinterface for instance, to be the subinterface responsable for that specific vlan. you can exercise this with wireshark and see the standard ethernet frame, and the ethernet frame when it is tagged.

@JuiceManTech 2 жыл бұрын

Thanks for the video. What layer would you say the DHCP server works on?

@FurdgeBJJ 2 ай бұрын

Layer 3

@draakoss1492 5 ай бұрын

Perfection

@shadowworks4380 3 жыл бұрын

I have on queation is it posible to have a working phone of pc whithout a mac adres and stil acces the internet ?

@potheeswaran4494 2 жыл бұрын

Can you tell me why the destination address comes first in this ethernet frame? By default source address is first and then only the destination address. What is the logic behind this?

@kapilramanujancbse 2 жыл бұрын

Hi How about a data payload greater than 1500 bytes is transmitted. So how does the fragmentation happen?.

@professoreno3139 4 жыл бұрын

Hi Dan, can you share this PowerPoint or diagram? As always, thank you for sharing your knowledge...

@danscourses 4 жыл бұрын

Yes! I just added the link to the slides in the video description but here it is also: drive.google.com/open?id=19vnT21JflhCMenQNKeCJ4P_OdlJu29mP

@wally19 2 жыл бұрын

wait, if you have a 42-1500 bytes w/802.1Q how do you get 1522? I think that its always "min 46 max 1500" then you have 18bytes from the eth frame or 22 with the Eth frame w/802.1Q Without 802.1Q: 64-1500 + 18 = 1518 With 802.1Q: 64-1500 + 18 + 4 = 1522

@markganus1085 2 жыл бұрын

is ethernet frame header the same as ethernet frame? if not, which fields are different?

@soulyt25 Жыл бұрын

🐐

@careditor 3 жыл бұрын

Is all this coded in the shell? ....I am a brand new newbie to IT Support and a little confused....

@SAMARTBO 2 жыл бұрын

thanks.

@joedoe9134 12 күн бұрын

wow .🤯

@majiddehbi9186 Жыл бұрын

i wonder if u are still actve Sir we miss u re lessons

@danscourses Жыл бұрын

I am still here Majid. What video topics are you interested in?

@majiddehbi9186 Жыл бұрын

@@danscourses haapy to hear from you Sir you the first who initiated me to networkin just to tell ou i recently passed my CCNA 200-301 AND NOW I M PREPARING FOR CCNP ENCOR I WAS JUST WONDERING IF YOU COULDN4T HELP ME OUT WITH THIS JUST BY SOME ADVISES OR THOUGHTS THX FOR ALL

@thomasturner1739 5 ай бұрын

Is this still current in 2024?

@einarsdandens8961 4 жыл бұрын

Hello vhat open wrong internet adress

@marksummers463 3 жыл бұрын

way too detailed useless give an over view thn graduallu add details

@NUVOILLUSR5671 Жыл бұрын

Sure if he was trying to explain this to attempt to help you transition from whatever level of knowledge you have, he could have done an overview and recapped on essential concepts but this is far from useless