Collision Domain and Broadcast Domain || Ethernet || Hub || Switch || Router

This video describes the concept of collision domain and broadcast domain on a computer network. The video answers the following:
What is a collision domain?
What is a broadcast domain?
Identifying a collision domain and broadcast domain on a computer network, working principle of a hub, switch, and router.
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Stock videos used in the intro:
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[@EppingForest16]

I just watched a bunch of videos trying to understand this topic, and this is the best video considering time-info-value… Props to the instructor! It makes it easy to understand!

[@bolajiabideen9791]

What I still don't understand is how a lot of information can fit into such a short video. Excellently done bro

[@Physical_Logik]

Thanks a lot Sir. We have a lot more to give 😊

[@brahman5963]

The best explanation ever had in short time

[@Physical_Logik]

Thank you for the feedback brahman. We have more awesome content coming up.

[@victoriabarragan2892]

Excellent explanation, thank you so much!! Greeting from Colombia!!

[@Physical_Logik]

Greetings too from Nigeria Victoria. We're glad you found our content useful. More are coming up soon. 🎉🎉🎉

[@victoriabarragan2892]

@@Physical_Logik Thank you... =D

[@vigneshpandiyan9040]

very well explained, shows how you observed concept, thanks....

[@Physical_Logik]

@vigneshpandiyan9040 thank you for the feedback. We have other videos like this one you can check out. 😉

[@vigneshpandiyan9040]

@@Physical_Logik sure will

[@hamzabeita2694]

I can't stop watching this video, it's so amazing

[@Physical_Logik]

Then we'll keep making more to make your day more amazing. 🙂

[@abdullahiahmad3244]

Very informative

[@MANNY_NG]

Wow. So much information in just 6 minutes. I am a big fan of your work.

[@Physical_Logik]

Thanks very much Sir. We'll keep giving our best. 👍

[@MrBank1717]

Awesome video!!!

[@Physical_Logik]

Thank you Jonoi Thomas for the awesome feedback. You can support us by subscribing so we can keep making more awesome videos.

[@islamibrahim8121]

Nice, this clarified somethings on broadcasting, feels like I'll be diving further into the channel.

[@Physical_Logik]

Welcome aboard Sir. We'll make your stay here an interesting one. 😅. Thank you very much.

[@shozsto9543]

a satisfactory explanation !!!! I 'am still waiting ur next videos . KEEP UP THE GOOD WORK

[@Physical_Logik]

Thank you charaf guerraiche! We're glad you like the video, we'll certainly make more.

[@esthernchuma1004]

Nice one dear. Keep up the good work

[@Physical_Logik]

Thank you very much. 😊 We'll keep up the good work.

[@yura2110]

Really good video !!!!!

[@Physical_Logik]

Thank you Yura Kamagi. We will keep giving the best.

[@jemuelbjeroham1228]

Superb explanation !!

[@Physical_Logik]

Thank you very much Jemuel B Jeroham. We'll keep bringing the best of them. 👍 We have other great videos too you may like to check out and please support us by subscribing. Thank you.

[@ahashanulkabir4324]

well explained

[@Physical_Logik]

Thank you Ahashanul Kabir. We're glad you found it useful.

[@caiocampos5614]

Thanks for the explanation! It was really clarifying for me. But, there's still something I don't get: why, in the end, are there eight collision domains? My train of thought was: 3 devices on the hub - 1 collision domain, 'cause the hub is dumb. 2 devices on the left switch, but the switch handles the propagation of the frames, so there's no collision domain. 3 devices on the right switch, but, same as above, there's no risk of collision. So, I thought there was only one collision domain. Where did I go wrong?

[@Physical_Logik]

You're welcome Caio Campos! If you remember, we made the initial assumption that all links were half duplex, that's where understanding becomes easier. As you have rightly said, hubs have one collision domain. In the final example, the Hub creates 1 collision domain and switch creates different collision domains. There are 4 devices attached to left switch, not 2: 1 hub, 2 PC's, and Router. Right switch has 4 devices too: 3 PC's and Router. Thanks for watching! You can check other cool videos we have made and support us by subscribing. Thanks Caio Campos!

[@abc-premium]

​@@Physical_Logik what if all the links were full duplex? btw, thanks for the video! the metaphor examples really easy for me to understand

[@Physical_Logik]

@Yeap HH Thank you for your feedback Sir. The concept of collisions and collision domains originated from the existence of half-duplex links that require CSMA/CD for managing collisions. If the full-duplex links connect individual interfaces on the end devices, then the same definition may apply.

[@abc-premium]

​@@Physical_Logik Do you have any video that have insights regarding half-duplex vs full-duplex? I kinda confused how to determine which duplex mode is used, is it based on the type of equipment (hub, switch, wifi)?

[@Physical_Logik]

@@abc-premium We do not have a video for that but we can do so specially if you make a request for it. However, you can watch Auto-negotiation and CSMA/CD on our channel to get some insights about half and full-duplex communications. Being half-duplex and full-duplex depends on the devices and the transmission lines used. Primarily, hubs support half duplex and requires CSMA/CD, Wireless Access Points support half-duplex and requires CSMA/CA, & Switches support full duplex. For transmission lines, coaxial cable is half duplex and twisted pair cables are full duplex. For a perfect communication, let the duplex modes on devices match that of the transmission line.

[@md.ifthahossainsagar6182]

great concept clear

[@Physical_Logik]

Thank you Hossain Sagar. You can check out other cool videos on our page. And as well support us with by subscribing to the channel. Thank you Hossain!

[@engrtakai]

Nice one Bro

[@Physical_Logik]

Thanks a lot. I appreciate a lot.

[@bighello4895]

When device want send data in hub , Does all-time hub send this data to all ports? Is that right?

[@Physical_Logik]

Yes, it always does. The hub cannot process at layer 2 that's why it cannot do MAC-address based forwarding.

[@bighello4895]

@@Physical_Logik right thanks😍

[@Physical_Logik]

@@bighello4895 Thanks a lot. You could subscribe with us if you love our videos. It'll go a long way. 😊

[@husseinahmad7879]

Nice presentation. Succinct! Though I would rather not play a game of electrocution 😂

[@Physical_Logik]

It's not so hard, you just need to hold a piece of wire and you'll be shocked to know the winner. 😂

[@SAHILSEDHAI]

WOW.

[@seetsamolapo5600]

Domain - an area/portion where a given rule applies - certain activity takes effect Collision domain - a transmission from a source reaches every node in that network segment - all transmissions always/default broadcast - hubs and simple cable connections are default broadcast - all interfaces on a hub are on the same collision domain Broadcast domain - a transmission from a source goes to a specific destination node via usage of MAC addresses, unless it's specifically send as a broadcast - all interfaces on a switch are in different collision domain but same broadcast domain - all interfaces on a router are on a different broadcast domain

[@Physical_Logik]

Yes, this is very correct seetsamolapo, you are awesome!

[@seetsamolapo5600]

​@@Physical_Logikno you're awesome. Just taking notes from your video. More networking videos even cybersecurity videos would be appreciated. This topic was super well explained and it's foundational to understanding networking

[@teksolucians6989]

TOP QUALITY CONTENT!!!!!

[@Physical_Logik]

Thanks for your feedback Tekso Lucians. We have more awesome content like this coming up soon. 😉

[@abdklaib7051]

thanks

[@Physical_Logik]

We're glad you found it useful Abd Klaib.

[@losmanatakisiyev766]

why 8? i dont understand

[@Physical_Logik]

Every link is continuous until it encounters a switch or router, then the connection breaks. That forms one collision domain. In the topology, observe the difference between when the devices are there and when they disappear. The routers and switches isolate collision domains, but for a hub, they're always joined together and are continuous. That's why it's 8.

[@losmanatakisiyev766]

@@Physical_Logik thanks a lot ❤️

[@kartikpatel3595]

I have 1 router, 4 switches, 7 hubs, 1 bridge and 8 PCs. 1. The router connected to the switch1, switch2, hub1 and bridge. 2. The switch1 is connected to the other two switches, switch3 and switch4 and pc1 is connected to switch 3 and pc2 is connected to switch 4. 3. The switch 2 is connected to the other two hubs, hub2 and hub3 and pc3 is connected to hub2 and pc4 is connected to hub3. 4. The hub1 is connected to the other two hubs, hub4 and hub5 and pc5 is connected to hub4 and pc6 is connected to hub5. 5. The bridge is connected to the other two hubs, hub6 and hub7 and pc7 is connected to hub6 and pc8 is connected to hub7. Identify the broadcast and collision domains in the given text and enter the number of Collision Domains and Broadcast Domains. Please explain.

[@Physical_Logik]

Collision domain count: 12 Broadcast domain count: 4 Explanation... Assuming all devices belong to the same VLAN and only one VLAN is used on the network, we can see that: (1) There are only 4 broadcast domains as only the router can isolate any broadcast on any of the segments its ports are connected to. These include broadcast segments involving SW1, SW3, SW4, PC1 & PC2 (segment 1); SW2, Hub2, Hub3, PC3, & PC4 (segment 2); Hub1, Hub4, Hub5, PC5 & PC6 (segment 3); and Bridge, Hub6, Hub7, PC7 & PC8 (segment 4) (2) There are also 12 collision domains described below: i. R - - > SW1 ii. R - - > SW2 iii. R - - > (Hub1, Hub4, Hub5, PC5, and PC6) iv. R - - > Bridge v. SW1 - - > SW3 vi. SW1 - - > SW4 vii. SW3 - - > PC1 viii. SW4 - - > PC2 ix. SW2 - - > (Hub2, PC3) x. SW2 - - > (Hub3, PC4) xi. Bridge - - > (Hub6, PC7) xii. Bridge - - > (Hub7, PC8) Thanks for stopping by!

[@kartikpatel3595]

@@Physical_Logik Thank you so much for explaining....😊😊😊

[@kartikpatel3595]

@@Physical_Logik Can i send Network Diagram for analyse all things in detail???

[@Physical_Logik]

@@kartikpatel3595 yes, you can send us an email.

[@kartikpatel3595]

@@Physical_Logik provide email address please

[@BreakintoTrading]

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