I just learnt something in 20 mins that my college professor could not explain in 2 hours! May god bless you with lot of wealth for creating such videos!!!!
Hey Jeremy! I am pretty sure that you are a busy man, but we would like you continue on doing this. Even if you release a video every week. Your course helps a lot!
@@JeremysITLab hey Jeremy, i started studying the CCNA from your videos but when it comes to anki flashcards, can't use them as you showed us. it directs me to your website. Can you please tell me how to get them.
@JeremysITLab Jeremy you changed my life. This week I took Network + Exam and failed it with a score of 644. When I got home I was browsing through the web and came across your content. The simulation I failed to answer on the exam, you explained I clearly through your content, I was on subnetting. Although I failed my Network + I am now thing of taking CCNA. I am doing my labs and reading the notes that I am writing down. Good bless you abundantly
Hey Jeremy, I am happy to say that I am CCNA certified. I passed the exam this month and I have to say it wouldn’t have been possible without your video tutorial.. I would like to thank you for your time and effort for creating these videos going into every detail as I realized each detail is important for the CCNA.. Now onto next challenge CCNP. Thank you all the best for your new videos.
Hey Jeremy! Thanks a lot for your time and effort on this amazing CCNA series, I am from Iraq and I use English as a 3rd language, your pronunciation is so clear and easy to understand! I cannot thank you enough for your amazon job. May the Lord bless you 🙏
I've always been good at memorizing which has actually hurt me when it comes to learning. That's why I had great grades in everything except math. Sometimes I go watch and rewatch your videos one more time, but if I focus, I always feel like I actually learned something not just memorized it.
Super video. As usually, I take printshots of almost all pictures with the snipping tool, copy those printshots in a word files and I add your commentaries and other stuff I deduce from the course. Again, thank you very much for these non-ambiguous explanations that makes alway easier our understanding.
Best video I have seen on this subject, life of a packet. Most presenters explain this subject without explaining the ARP process, which is important to understand. The quiz at the end of the video is a great reinforcement. Thank you for taking the time to make these videos.
This Video was everything to me! It helped me connect everything in your video's! Im not sure why it seemed like there was a piece missing, but after this video everything is so much clearer! I normally dont comment on video's but I am so appreciative and excited that it has finally "clicked"!!❤
I can't thank you enough J. You are exceptionally great in your explanation. I'm new in the field and I must let you know your lectures are working the magic for me.
Seriously, you have done an amazing job with these videos and lessons. Really appreciate how easy everything is to understand. Definitely recommending your videos to anyone I know that wants to get into networking. Awesome work!
Hey there Jeremy! This is great stuff. Im 22 and its so nice to be able to sit down and learn something that'll help me afford a better life. Thanks for the help!
Spanish: La sección de cuestionarios me ayudó a entender que aunque el proceso ARP no tendrá solicitudes y respuestas, el paquete a su destino final aún no ignora el proceso del enrutador. Podría haber pensado que el paquete pasa a través de los enrutadores sin desencapsular y encapsular ningún dato. Los colores también marcan la diferencia. Gran trabajo Jeremy English: The quiz section helped me understand that even though the ARP process will not have request and replies, the package to its final destination still does not ignore the router process. I might have thought that the packet goes through the routers without de-encapsulating and encapsulating any data. Colors makes the difference as well. Great job Jeremy
the answer of question 3 about the "Life of a packet' lab : step by step A. Source/Destination MAC at PC4 → SW2 segment: .4444/.ffff (R3's G0/1 MAC) B.Source/Destination MAC at SW2 → R3 segment: .4444/.ffff (R3's G0/1 MAC) C. Source/Destination MAC at R3 → R2 segment: .eeee(R3's G0/0 Mac)/.dddd(R2's G0/1 MAC) D. Source/Destination MAC at R2 → R1 segment: .cccc(R2's G0/0 Mac)/.bbbb(R1's G0/1 MAC) E. Source/Destination MAC at R1 → SW1 segment: .aaaa(R1's G0/0 Mac)/.1111(Pc1's MAC) F. Source/Destination MAC at R1 → SW1 segment: .aaaa(R1's G0/0 Mac)/.1111(Pc1's MAC)
I have been studying these videos for the past week. Taking notes, using supplementary materials. Being new to IT it takes me a lot of time to digest the content. A video like this is an amazing review. Despite you stating it is not practical - it was! It allows us to see the larger picture. I know, I know - the real big picture is just behind the corner. Thank you. Looking forward to catching up with the whole course.
just wanted to show some appreciation by saying how much i enjoy you being so thorough through out this course, really helps a lot. i can only imagine how annoying it was for you to repeat those IP addresses. lol
minor point, but there has been at least one actual exam question asking to put the ethernet header fields in the correct order. so it pays to bear in mind that for the ethernet header field, the destination mac comes first. as a matter of fact, here's the whole list: preamble - SFD - dest - source - TYpe /length
Great work Jeremy! Many thanks for your valuable teaching videos. I'm in Day 12 and done all Quiz and Labs, really your course helps a lot! Once again many Thanks Jeremy
Hello Jeremy! It's my first time watching your chanel and this video got me stuck. Well explained to the point that I had to click on the subscribe button. Very good job man. I promise to watch all past and future videos.
Hi Jeremy, I just wanted to reach out and thank you for this video. I've been having trouble with the OSI model mostly on the reasoning "why" layer 2 and layer 3 are so useful when thinking about networks. This video just made it click for me. It's all makes so much more sense!
these videos are complimenting my study really really well Jeremy. I love to watch the videos at night on the topics that ive been studying that day. Going to be gutted when i catch up to your video releases with my study plan!! Thanks!
You are a saint for the effort you have put into this amazing course. Networking has always been my weaker area of knowledge and this course has helped me so much. Thank you!
This is really helping me learn a lot. I appreciate the way you break everything down and explain. I am going to continue onward and eventually take the CCNA.
Such a great walkthrough, really helps show what is going on, especially when using ping and the first (or few) ICMP echo requests time out because ARP needed to happen.
so cool how you explain things so easly that even i can understand. i dont understand english very well but the way you explain everything, make it possible that even i understand your lessons. when i get my CCNA certification, the first thing i will do is give you a good tipp as a thank you for all your videos. thank you!
this video is filling in so many gaps that i used to have. so sum it up: 1. source mac addresses change as they travel through different routers 2. the source and destination Ip addresses remain unchanged all the way
Thank you Jeremy you have made us good at this. at a moment am preparing to do my ccna certification on 26th-june -2024 but am only using youre videos just parted away from my notes which were provided by my turtor because things could not add up...thanks again i know i will pass my exam.
Loving the series can't wait to finish it up, flashcards have been so helpful to have them made already. I had tried Anki before and couldn't get the hang of it but your video helped make it simple and functional for me. Additionally, having them pre-made showed me some good question formats that has been helping me make my own Anki flashcards.
thank you jeremy man. Im using these videos exclusively to study along with the flash cards and labs. I just found out a few days ago that your course isnt finished :( im really hoping to have my CCNA by early next year but I saw you said in another comment that you hope to be finished next year. Is there anything else youd recommend if youre not finished? Maybe CBT Nuggets or Boson for the practice tests? thank you again so much. These videos are helping me IMMENSELY. you are an amazing instructor. More thorough than anyone ive watched. And the easiest to listen to!
Hi Jeremy, you videos are awesome and ease to understand. It is very good if you keep post the flashcards helps really good to review the study materials.
Thank you, yes I will continue posting flashcards! Just for this lecture, there are none. If you want all of the flashcards, sign up from the link in the video description :)
Hello Jeremy i have watched several of your videos in hopes of earning a CCNA certification and maybe one day Cisco will certify me as a professional too I hope that I can find a remote job making good money here in the mountains of SW Colorado. I was recently hired as a full time employee at a wireless Internet service provider. This dude I work for is real cool he knows how to configure all this stuff and he was Cisco certified before (he is no longer because he is self employed and doesn't need it) so I have a good set of resources to further develop my skill. Climb towers, configure routers
Hi Jeremy, regarding Question1, If it is the first time PC4 is sending the packet to PC1, doesn't the ARP process happen to make the destination MAC address all F's instead of "fffe"? Thanks a lot.
The destination MAC of the ARP request to learn R4's MAC will be 'FFFF', but the destination MAC of the packet sent to PC1 will be 'FFFE' when it's sent from PC4.
Because of the routing table does R1's initial ARP still go to R3 as well? Or because it knows the next hop it can just specifically ask R2 it's mac? The way you said it, it seems like a unicast arp request, if that's even possible.
The ARP doesn't go to R3. R1 wants to know the MAC address for 192.168.12.2 (R2, which is configured as the next hop). R1 knows that the 192.168.12.0/24 network is connected to it's Gi0/0 interface, so it sends the ARP request out of the Gi0/0 interface. The ARP message is still a broadcast message (destination MAC address FFFF.FFFF.FFFF), however only one device (R2) happens to be connected to that interface so only R2 receives the ARP request.
@@JeremysITLab Wow I missed your very well said reply, sorry! I think I get it. The routers interfaces are all on different lans and arps only broadcast within a LAN yeah? So it doesn't go to R3. It already narrowed it down using layer 3 and it's routing table to know what interface to use?
Great recap video for what we've learned before, it really includes every topic we've learned and shows us a big picture of it. Thanks for such a great course Jeremy!
Hi Jeremy, it's the first time I'm commenting on your videos but I gotta say that they're really helpful. I've watched videos on CBTNuggets and they're a bit difficult for me to follow. Great job, and thank you for doing this. I love the flashcards and the labs you created. Just my two cents but, I think it'd be better if the labs are a little more difficult or complicated because it's through troubleshooting complexities that we learn the best. Nevertheless, thank you! Really appreciate your efforts
Thanks for the advice! I'll think about making the labs more complex. I was planning to add more troubleshooting labs after I finish the course syllabus, but maybe I'll add some more before that as well.
thank you soo much..... i was wondering how router will use arp... coz router doesnt broadcaste and arp is broadcaste...now u cleared my doubts thank u
Hello Mr Jeremy...First thanks for everything .I can't explain how your channel is useful to me ..yet I have a question .now if the router will forword the packet to another router that the dest ip is still in another network..why it still need to encapsulate it with mac address though it will uses the interfaces in the routes to forword it ??
It has to use the MAC address of the other router so the other router will receive it. If a router receives a frame with the wrong MAC address, it will drop the frame.
Hi Jeremy, thanks a lot for this course. I'm planning to do the CCNA exam this year. Can be possible that in min: 9:25 aprox R1 sends the frame to R3 too (because of ARP) and him discard that because He doesn't have preconfigured a route to 192.168.4.0/24. Sorry for my bad knowledge and English, I'm retaking this course after months
They don’t keep MAC address tables, so they don’t learn MAC addresses dynamically. However they do keep ARP tables to map MAC addresses to IP addresses.
Hey Jaremy! My english very bad but your video very helpful for me. I hope in the future, I will pass exam CCNA! Thank you=) Please don't stop release video .
Hi Jeremy, Quick question about ARP operation on router: When PC1 to to PC4 packet arrives at R1, does R1 sends ARP for the next hop (192.168.12.2) from all interfaces (G0/0, G0/1 and G0/2?) or, since it knows the 192.168.12.0/24 is directly connected to G0/0 - it will only send the ARP from that interface (unlike a switch would do)?
Answered my own question by doing a quick repro in the lab. :) The ARP only leaves from the g0/0 interface (the one that network is directly connected). If my understanding is right - routers do not flood the ARP from all interfaces, but only throught the interface that has a respective IP Dest address in the routing table. Please correct me if I'm wrong there.
Hi Jeremy! Thanks for sharing this amazing series with us. My question: Do Routers also broadcast an ARP REQUEST like switches do? For example when R1 sends ARP for 192.168.12.2 (R2) will it also go to R3?
Hi Farhan! No, they do not. Broadcast messages are not forwarded by routers, although routers do send their own broadcast messages (such as ARP messages). Actually, there is something called 'proxy ARP' in which a router will forward a broadcast ARP request, but that's beyond the CCNA!
@@JeremysITLab hey! I want to clarify this point a little further. I believe Farhan was may have been referring to the routers ARP messages rather than forwarding the switches ARP messages. I too would like to know if routers send ARP requests out of all interfaces when sending ARP messages. I ask because at 8:24 the pink arrow indicating where the ARP message goes, goes only to R2. So I was wondering, if it doesn't send ARP requests out of all of its interfaces, how does it know to only send an ARP request (so I guess therefore using a unicast connection) out of the Gi0/0 interface?
@@urklegizmo because of the static routing that Jeremy explained at 2:19. R1 chooses the most specific path first (in this case he only set the route R1 to R2), then sends the request.
![Blox Fruits Dragon Rework Update [Full Stream]](http://i.ytimg.com/vi/EqDAp8udhm0/mqdefault.jpg)
I just learnt something in 20 mins that my college professor could not explain in 2 hours! May god bless you with lot of wealth for creating such videos!!!!
Hey Jeremy! I am pretty sure that you are a busy man, but we would like you continue on doing this. Even if you release a video every week. Your course helps a lot!
Thank you, I will keep releasing a video every week!
@@JeremysITLab hey Jeremy, i started studying the CCNA from your videos but when it comes to anki flashcards, can't use them as you showed us. it directs me to your website. Can you please tell me how to get them.
@@JeremysITLab Good thing about watching your videos in 2023 is they are all there!
@@ahmedelkhawaga7369download the anki application then his flashcards, easy.
@JeremysITLab Jeremy you changed my life. This week I took Network + Exam and failed it with a score of 644. When I got home I was browsing through the web and came across your content. The simulation I failed to answer on the exam, you explained I clearly through your content, I was on subnetting. Although I failed my Network + I am now thing of taking CCNA. I am doing my labs and reading the notes that I am writing down. Good bless you abundantly
Hey Jeremy, I am happy to say that I am CCNA certified. I passed the exam this month and I have to say it wouldn’t have been possible without your video tutorial.. I would like to thank you for your time and effort for creating these videos going into every detail as I realized each detail is important for the CCNA.. Now onto next challenge CCNP. Thank you all the best for your new videos.
Congrats on the pass! Well done Premkumara :) I hope my CCNP course will be helpful too!
what material did you use to study? aside from Jeremy's videos?
I am going to be in the same boat very soon. Would you please allow me to connect with you on Whatsapp or FB ?
I was never interested in completing my CCNA, but now I am binge watching your videos and labs. Thank you for this amazing course.
Some people binge watch Netflix, others binge watch CCNA videos! Haha, I'm glad you like them ;)
Hey Jeremy. I passed my CCNA today. I’m grateful to my higher power and I appreciate you for making this course. You’re awesome
Any advice for a beginner brother.
@@sherminmehdi8748 hows your progress going on man? i just started my journey to ccna
Hey Jeremy!
Thanks a lot for your time and effort on this amazing CCNA series, I am from Iraq and I use English as a 3rd language, your pronunciation is so clear and easy to understand! I cannot thank you enough for your amazon job.
May the Lord bless you 🙏
I bought a course on udemy and was so much confused by the way he made it look so compilcated, this is so well made. Sticking to this series now.
Thanks, glad to hear it!
I've always been good at memorizing which has actually hurt me when it comes to learning. That's why I had great grades in everything except math. Sometimes I go watch and rewatch your videos one more time, but if I focus, I always feel like I actually learned something not just memorized it.
Super video. As usually, I take printshots of almost all pictures with the snipping tool, copy those printshots in a word files and I add your commentaries and other stuff I deduce from the course. Again, thank you very much for these non-ambiguous explanations that makes alway easier our understanding.
Best video I have seen on this subject, life of a packet. Most presenters explain this subject without explaining the ARP process, which is important to understand. The quiz at the end of the video is a great reinforcement. Thank you for taking the time to make these videos.
Thank you, I'm really glad to hear that :)
This Video was everything to me! It helped me connect everything in your video's! Im not sure why it seemed like there was a piece missing, but after this video everything is so much clearer! I normally dont comment on video's but I am so appreciative and excited that it has finally "clicked"!!❤
I can't thank you enough J. You are exceptionally great in your explanation. I'm new in the field and I must let you know your lectures are working the magic for me.
Thank you :)
Seriously, you have done an amazing job with these videos and lessons. Really appreciate how easy everything is to understand. Definitely recommending your videos to anyone I know that wants to get into networking. Awesome work!
Thanks Zach!
Hey there Jeremy! This is great stuff. Im 22 and its so nice to be able to sit down and learn something that'll help me afford a better life. Thanks for the help!
Thanks for the comment, glad to help :)
Spanish: La sección de cuestionarios me ayudó a entender que aunque el proceso ARP no tendrá solicitudes y respuestas, el paquete a su destino final aún no ignora el proceso del enrutador. Podría haber pensado que el paquete pasa a través de los enrutadores sin desencapsular y encapsular ningún dato. Los colores también marcan la diferencia. Gran trabajo Jeremy English: The quiz section helped me understand that even though the ARP process will not have request and replies, the package to its final destination still does not ignore the router process. I might have thought that the packet goes through the routers without de-encapsulating and encapsulating any data. Colors makes the difference as well. Great job Jeremy
I wasted 11000 rupees for CCNA course where they taught nothing.. thanks to you for making these videos for free where guys like me learning so easily
the answer of question 3 about the "Life of a packet' lab :
step by step
A. Source/Destination MAC at PC4 → SW2 segment: .4444/.ffff (R3's G0/1 MAC)
B.Source/Destination MAC at SW2 → R3 segment: .4444/.ffff (R3's G0/1 MAC)
C. Source/Destination MAC at R3 → R2 segment: .eeee(R3's G0/0 Mac)/.dddd(R2's G0/1 MAC)
D. Source/Destination MAC at R2 → R1 segment: .cccc(R2's G0/0 Mac)/.bbbb(R1's G0/1 MAC)
E. Source/Destination MAC at R1 → SW1 segment: .aaaa(R1's G0/0 Mac)/.1111(Pc1's MAC)
F. Source/Destination MAC at R1 → SW1 segment: .aaaa(R1's G0/0 Mac)/.1111(Pc1's MAC)
I have been studying these videos for the past week. Taking notes, using supplementary materials. Being new to IT it takes me a lot of time to digest the content. A video like this is an amazing review. Despite you stating it is not practical - it was! It allows us to see the larger picture. I know, I know - the real big picture is just behind the corner. Thank you. Looking forward to catching up with the whole course.
Thanks Hubert, glad you like it :)
You are a naturally gifted knowledge transferrer. You dismantle the myths behind the technology with ease. My thanks know no limit.
Thank you Lanre, I really appreciate that!
Jeremy, you are my hero! you always try to keep the videos short but i could listen forever and enjoy the longer videos
just wanted to show some appreciation by saying how much i enjoy you being so thorough through out this course, really helps a lot. i can only imagine how annoying it was for you to repeat those IP addresses. lol
minor point, but there has been at least one actual exam question asking to put the ethernet header fields in the correct order. so it pays to bear in mind that for the ethernet header field, the destination mac comes first.
as a matter of fact, here's the whole list:
preamble - SFD - dest - source - TYpe /length
This is a life-changing tutorial for those who would like to have a network engineering career. Thanks a lot.
I just want to take a moment and thank you for making this videos. It's a huge help and I know an insane amount of work went into it.
Great work Jeremy! Many thanks for your valuable teaching videos.
I'm in Day 12 and done all Quiz and Labs, really your course helps a lot!
Once again many Thanks Jeremy
Thank you, I'm glad the videos are helpful!
Hello Jeremy! It's my first time watching your chanel and this video got me stuck.
Well explained to the point that I had to click on the subscribe button.
Very good job man. I promise to watch all past and future videos.
Thanks so much!
Hi Jeremy, I just wanted to reach out and thank you for this video. I've been having trouble with the OSI model mostly on the reasoning "why" layer 2 and layer 3 are so useful when thinking about networks.
This video just made it click for me. It's all makes so much more sense!
these videos are complimenting my study really really well Jeremy. I love to watch the videos at night on the topics that ive been studying that day. Going to be gutted when i catch up to your video releases with my study plan!!
Thanks!
Thank you James!
day 12 completed Thankyou Jeremy for the video series
You are a saint for the effort you have put into this amazing course. Networking has always been my weaker area of knowledge and this course has helped me so much. Thank you!
Great work Jeremy! Thank you for your valuable teaching videos. I really like the structured and accurate style of them! Keep going on. :)
Thanks, I try to make them straightforward and easy to understand!
the more I study the less I know.😔
Dunning-Kruger effect
This is really helping me learn a lot. I appreciate the way you break everything down and explain. I am going to continue onward and eventually take the CCNA.
Thank you, good luck!
Such a great walkthrough, really helps show what is going on, especially when using ping and the first (or few) ICMP echo requests time out because ARP needed to happen.
This is incredibly good. Thanks A lot. Your content, teaching method and voice tone is beyond the usual.
Thank you, Mustafa :)
This is great material. Another way to understand the concept is this of it as someone traveling with layover flights.
In Jeremy we trust, best channel for the ccna. I want to donate something to the channel!
Hello sir, I found your videos very helpful to me ....so please just continue this .... without taking a long time .... thanks a lot
so cool how you explain things so easly that even i can understand. i dont understand english very well but the way you explain everything, make it possible that even i understand your lessons. when i get my CCNA certification, the first thing i will do is give you a good tipp as a thank you for all your videos. thank you!
this video is filling in so many gaps that i used to have. so sum it up:
1. source mac addresses change as they travel through different routers
2. the source and destination Ip addresses remain unchanged all the way
You are a godsend!
Thank you Jeremy you have made us good at this.
at a moment am preparing to do my ccna certification on 26th-june -2024 but am only using
youre videos just parted away from my notes which were provided by my turtor because things could not add up...thanks again i know i will pass my exam.
Loving the series can't wait to finish it up, flashcards have been so helpful to have them made already. I had tried Anki before and couldn't get the hang of it but your video helped make it simple and functional for me. Additionally, having them pre-made showed me some good question formats that has been helping me make my own Anki flashcards.
thank you jeremy man. Im using these videos exclusively to study along with the flash cards and labs. I just found out a few days ago that your course isnt finished :( im really hoping to have my CCNA by early next year but I saw you said in another comment that you hope to be finished next year. Is there anything else youd recommend if youre not finished? Maybe CBT Nuggets or Boson for the practice tests?
thank you again so much. These videos are helping me IMMENSELY. you are an amazing instructor. More thorough than anyone ive watched. And the easiest to listen to!
I recommend getting the OCG (official cert guide) books by Wendell Odom. On top of that, Boson ExSim is a great resource for practice tests.
Thank you for the videos! I am slowly but surely understanding all of the concepts of networking.
I am learning this course in class but How good you are! you are an amazing teacher bro #Jermy!
Hi Jeremy, you videos are awesome and ease to understand. It is very good if you keep post the flashcards helps really good to review the study materials.
Thank you, yes I will continue posting flashcards! Just for this lecture, there are none. If you want all of the flashcards, sign up from the link in the video description :)
Those quiz questions really helps. Trust me those really helps and corrects us if we understood wrong or had some confusions
Thanks Sakshi, I'm glad they help :)
I am promising the first 1/2salary of my job will be your tip. please continue it helps very much.
Thank you! I appreciate, but you should keep your hard-earned salary!!
Lessons well under stood
Thanks Jeremy! I was able to understand the whole time and got all of the quiz questions correct!
Awesome, I'm glad to hear that :)
Hello Jeremy i have watched several of your videos in hopes of earning a CCNA certification and maybe one day Cisco will certify me as a professional too I hope that I can find a remote job making good money here in the mountains of SW Colorado. I was recently hired as a full time employee at a wireless Internet service provider. This dude I work for is real cool he knows how to configure all this stuff and he was Cisco certified before (he is no longer because he is self employed and doesn't need it) so I have a good set of resources to further develop my skill. Climb towers, configure routers
Hi Jeremy, regarding Question1, If it is the first time PC4 is sending the packet to PC1, doesn't the ARP process happen to make the destination MAC address all F's instead of "fffe"? Thanks a lot.
The destination MAC of the ARP request to learn R4's MAC will be 'FFFF', but the destination MAC of the packet sent to PC1 will be 'FFFE' when it's sent from PC4.
Sir your really awesome and making things so crystal clear. Thank you
Because of the routing table does R1's initial ARP still go to R3 as well? Or because it knows the next hop it can just specifically ask R2 it's mac? The way you said it, it seems like a unicast arp request, if that's even possible.
The ARP doesn't go to R3. R1 wants to know the MAC address for 192.168.12.2 (R2, which is configured as the next hop).
R1 knows that the 192.168.12.0/24 network is connected to it's Gi0/0 interface, so it sends the ARP request out of the Gi0/0 interface.
The ARP message is still a broadcast message (destination MAC address FFFF.FFFF.FFFF), however only one device (R2) happens to be connected to that interface so only R2 receives the ARP request.
@@JeremysITLab Wow I missed your very well said reply, sorry! I think I get it. The routers interfaces are all on different lans and arps only broadcast within a LAN yeah? So it doesn't go to R3. It already narrowed it down using layer 3 and it's routing table to know what interface to use?
Great recap video for what we've learned before, it really includes every topic we've learned and shows us a big picture of it. Thanks for such a great course Jeremy!
Jeremy, I don't have much to say here except.. You're the best!!
Thank you Shlomi :)
Incredible explanation, Jeremy.
Thank you so much!!
Hi Jeremy, it's the first time I'm commenting on your videos but I gotta say that they're really helpful. I've watched videos on CBTNuggets and they're a bit difficult for me to follow. Great job, and thank you for doing this. I love the flashcards and the labs you created. Just my two cents but, I think it'd be better if the labs are a little more difficult or complicated because it's through troubleshooting complexities that we learn the best. Nevertheless, thank you! Really appreciate your efforts
Thanks for the advice! I'll think about making the labs more complex. I was planning to add more troubleshooting labs after I finish the course syllabus, but maybe I'll add some more before that as well.
Wonderful, i have no idea if the information in the video is correct, but im watching all of them till the end, and memorizing all of it.
I was just thinking like every 10 or so episodes I would love a review quiz then I scroll on this an say this man knows
You're a master teatcher!! 🙂 Better then original CCNA course!
thank you soo much..... i was wondering how router will use arp... coz router doesnt broadcaste and arp is broadcaste...now u cleared my doubts thank u
Routers do send broadcasts that they originate, but they won't forward a broadcast message received from another device.
I love your video as it touches the core knowledge of networking.
Insightful videos. Have managed to watch till Day12. Still long way to go but I am confident to complete it soon ✌
Thank You, going for recertification of my CCNA and looking to refresh and learn any new information.
I am become Packet, the harbinger of traffic
Excellent tutor and wonderful material to learn more about networking. Kudos to Jeremy
Thank you!
I love thé feeling when something just clicks
Loving your videos
Thank you for putting your time into this
Hello Mr Jeremy...First thanks for everything .I can't explain how your channel is useful to me ..yet I have a question .now if the router will forword the packet to another router that the dest ip is still in another network..why it still need to encapsulate it with mac address though it will uses the interfaces in the routes to forword it ??
It has to use the MAC address of the other router so the other router will receive it. If a router receives a frame with the wrong MAC address, it will drop the frame.
Hi Jeremy, thanks a lot for this course. I'm planning to do the CCNA exam this year. Can be possible that in min: 9:25 aprox R1 sends the frame to R3 too (because of ARP) and him discard that because He doesn't have preconfigured a route to 192.168.4.0/24. Sorry for my bad knowledge and English, I'm retaking this course after months
6:45 do Routers also learn MAC address dynamically? Do they keep MAC address tables? What about ARP tables on a Router?
They don’t keep MAC address tables, so they don’t learn MAC addresses dynamically. However they do keep ARP tables to map MAC addresses to IP addresses.
Excelent teacher and wonderful material to learn more about networking
Thank you :)
Sir you are best Instructor.
Sir Can you add more videos per week. and Trouble shoot labs.
Thank you! Sorry I don't have enough time to add more videos.
@@JeremysITLab ok give us lab and thyary videos per week
Hey Jaremy! My english very bad but your video very helpful for me. I hope in the future, I will pass exam CCNA! Thank you=) Please don't stop release video .
Thank you! Good luck!
I can't watch CBT Nuggets videos, after you. Great lecture, as always!
Thank you ;) ButI think the group at CBT Nuggets are all great teachers!
Thank you Jeremy for all the great work you are doing for others. Really awesome way of teaching deep understanding 👍👍
Thank you so much for your comment :)
Sir, you're a hero!
Hi Jeremy,
Quick question about ARP operation on router:
When PC1 to to PC4 packet arrives at R1, does R1 sends ARP for the next hop (192.168.12.2) from all interfaces (G0/0, G0/1 and G0/2?) or, since it knows the 192.168.12.0/24 is directly connected to G0/0 - it will only send the ARP from that interface (unlike a switch would do)?
Answered my own question by doing a quick repro in the lab. :)
The ARP only leaves from the g0/0 interface (the one that network is directly connected).
If my understanding is right - routers do not flood the ARP from all interfaces, but only throught the interface that has a respective IP Dest address in the routing table.
Please correct me if I'm wrong there.
That’s right
Hi Jeremy, Great video! How many videos do you think there will be in the entire series?
Another fantastic lesson, thanks Jeremy
This video was really great for recollecting and the quiz for this video was really great
Thanks Samuel, glad to hear it :)
Thanks again for the refresher. Solid.
omg so good , very easy explanation , Best video ever-
Thank you :)
5:28 i did see in paket tracer but first i did not mind .
Hi Jeremy! Thanks for sharing this amazing series with us.
My question: Do Routers also broadcast an ARP REQUEST like switches do? For example when R1 sends ARP for 192.168.12.2 (R2) will it also go to R3?
Hi Farhan! No, they do not. Broadcast messages are not forwarded by routers, although routers do send their own broadcast messages (such as ARP messages).
Actually, there is something called 'proxy ARP' in which a router will forward a broadcast ARP request, but that's beyond the CCNA!
@@JeremysITLab hey! I want to clarify this point a little further. I believe Farhan was may have been referring to the routers ARP messages rather than forwarding the switches ARP messages. I too would like to know if routers send ARP requests out of all interfaces when sending ARP messages. I ask because at 8:24 the pink arrow indicating where the ARP message goes, goes only to R2. So I was wondering, if it doesn't send ARP requests out of all of its interfaces, how does it know to only send an ARP request (so I guess therefore using a unicast connection) out of the Gi0/0 interface?
@@urklegizmo because of the static routing that Jeremy explained at 2:19. R1 chooses the most specific path first (in this case he only set the route R1 to R2), then sends the request.
God bless you Jeremy
Really clear, thanks sir
Day 12 was awesome! Thank you Jeremy!
This was a simple video that explains a lot. I got tricked with Q4 ...I thought I read what was the MAC LOLOL. 4/5 correct.
You're the best instructor
Thank you :)
wow.. u r awesome... Learned so many from ur video.. I love learninng these.. i am not preparing for ccna tho
Glad to hear you like the videos :)
You are amazing Jeremy 😍
Thank you Jeremy
You've been very helpful.
Thank you Albert!
Excellent lecture as always!
Thanks, Julian :)
This has been so very helpful in understanding these concepts, many thanks👍
Thanks, glad to hear it!
Thanks alot Jeremy for the videos.. now thinking about what's the next video ..
Next will be a packet tracer lab, then after that I will talk about subnetting!
WooHoo, Im doing homework again finally, we are so back
Thank you Jeremy, your videos are really good
Thank you :)