Hello Jeremy, just want to let you know I passed the CCNA exam using your videos and other materials I purchased. Your videos helped A LOT, and the Anki app! THANK YOU VERY MUCH for making these videos and labs, keep up the good work!
@Lai Ho. Congrats on the certificate! I am solely relying on Jeremy's course to study for now and I am following along quite well, but I am sure just this won't be enough to crack the exam, so could you recommend what other materials you used to study? Thanks.
I just looked for 30min on youtube looking for some other channels/videos that explain DHCP, because I didn't completely understand something There's not even 1 channel/video that i found that match Jeremy IT Lab, the closest was Keith Barker, and even he isn't a match for Jeremy's video. Thank u so much Jeremy for this course and the CCNP, thank you for the time and effort u put in the course. I hope everyone that is watching this course appreciate this amazing course and the fact that it's free for everyone to use.
Thanks Jeremy, I'm really grateful. I just passed my CCNA exam with score 959. I highly recommend your videos to get deep understanding. Merci beaucoup de Montréal
I can’t imagine how valuable these videos have been to my journey into networking. Priceless and by far the best RUclips vid on the CCNA. Thanks greatly for your selfless devotion to this course. If not for all others, you are a gemstone to me. Keep it up! I can’t wait to see you tackle the new add-on topics on security, wireless and automations. I’m hopeful it would shot me into getting 95% prepared for the CCNA. Thanks again Jeremy!
Hi Jeremy, at the timestamp 10:43, the slide title is incorrectly shown as "DHCP Release" however it is a "DHCP Discover". Just putting it out so that it doesn't confuse someone going through the video. PS - I already passed CCNA in the year 2021 by watching your CCNA series. Just rewatching them to revise the topics.
I have been studying hard for the last few weeks, finally I reach the last video in the playlist :)). Really grad to join 2000+ people who are still learning at this point.
I'm a system administrator, and we use centralized WDS server to image machines, I always say configure IP Helper to the network team. I didn't know that easy. Thanks Jeremy. BTW I didn't watch just this video and I've been watching the whole series, even though I won't get the CCNA it's good stuff for understanding of network.
i find it kinda fun that you live in japan, i learnt japanese till n4 last year! also as always, thank you for your materials! my exam is next month, if i pass itll mostly be because of your deep coverage!
The slide at minute 11 talking about DHCP discover messages, has "DHCP release" in the title. Just a heads up that might be wrong, since you're talking about discovery messages. Also, big fan of what you're doing here Jeremy. Thank you so much for these lectures!
I tried this while following along on my pc and didn't realize id disconnect myself from the Internet, glad enough video had loaded where I could see the ipconfig /renew command!
doing my ccna course, this week will be my final week for the course still need a lot of catching up to do, so far your videos help me understand more clearly, ive subsribe to your channel
Thanks for putting this up Jeremy. COVID hit me hard and I have had a lot of trouble getting back to work. I responded to an ad on Indeed for a Cybersecurity Bootcamp that is highly selective as the training is paid.....They have a rigorous selection process. I have a few years on the helpdesk and a couple of courses in various things, but I do not consider myself a wizard. Between you, a couple of other vids and a small handful of books, I made it through selection to the tech interview. RUclips should know by now that your channel is a fantastic resource. Your explanations are clear, complete and concise, if I make it into this bootcamp you get a lot of the credit. Anyone reading this, the whole course is great, highly recommended. Subbed, liked and will sponsor/join. Thanks for helping me get back to work in a profession that I like. I will reach out to you through industry channels as well if I get in.
Hi Jeremey, i know i say this say this every Tuesday but thank you. Have actually discovered that am strongest in the topics you've covered in my ccna studies,
I found these and just wanted to share: DHCP messages are formatted in an identical way to BOOTP messages. Without the specific magic cookie, it would be impossible to differentiate between a BOOTP and a DHCP message. In fact, the fixed magic cookie present in the BOOTP message means that this is really a DHCP message, and everything that follows the magic number is to be interpreted as DHCP options. The Bootstrap Protocol (BOOTP) is a computer networking protocol used in Internet Protocol networks to automatically assign an IP address to network devices from a configuration server.
Incredible work, Jeremy. Absolutely invaluable so far. I am a bit confused as to why some people think it's taboo to ask how much longer before the course is complete. I too have that same question to help me plan my schedule for the next several months. Again awesome content!
Hello Jeremy and all mates, I have a question. At 20:20, why Src IP of R1 isn't 10.0.0.1 from g0/0 (the outgoing interface), since R1 send the unicast message from g0/0?
Hello Jeremy I just noticed at 10:36 that slide says DHCP Release when you're going over the DHCP Discover process / message type. Not a big deal but I just wanted to point it out.
During job interviews they usually hit you with basic troubleshooting questions, like using show version, BGP uptime, etc. Are you planning to cover stuff like this sometime? Appreciate your great work!
In the screenshots at 25:25, is there a reason why the client ID in Cisco IOS is 0100.0c29.e727.39 but the physical address on the device is 00-0C-29-E7-27-39? Is IOS prepending 01 for some reason, or is that a mistake?
Thanks for this video Jeremy, it's very good. 22:34 is the bottom and top of excluded-address range inclusive or exclusive ? Also, looks like to configure a Relay Agent, one must configure it per interface which could be cumbersome if a router has a lot of connected interfaces. Is there a way to make the Relay Agent so that it uses the helper address for all interfaces with an over-all command? Thank you
Inclusive! So 192.168.1.1 and 192.168.1.10, as well as the addresses between, will be excluded. Routers typically don't have many connected networks, and it's no more cumbersome than configuring the router's own IP address on the interface (just one additional command), so there isn't any global command for it as far as I know.
Thanks! There's a lot more that I could explain about DHCP, but you don't need so much depth for the CCNA. I recommend reading the TCP/IP guide for a more in-depth explanation: www.tcpipguide.com/free/t_toc.htm Here's a diagram with step-by-step walkthrough: www.tcpipguide.com/free/t_DHCPLeaseRenewalandRebindingProcesses-2.htm
Thank you sir I have one question about the DHCP Relay Agent how could R1 g0/1 be the source rather than R1 g0/0 ? and does the message go throught R1 g0/0 ?? Thank you
Great video as always! Could you eloborate on why it is rare for network devices such as routers to have their network config be provided through DHCP?
Hi Jeremy, I would like to ask a question, when a single router act as dhcp server for more than one subnet, meaning it has more than one pool, which pool does the router know to give to a client? is it by matching the interface ip address which the dhcp discover message received on? and do we need to explicitly configure excluded the address that has been used for the router interface or does the router just excluded it automatically since the router know it uses the address, Thanks in advance Jeremy
The router will decide which pool to use by the interface the DISCOVER was received on. If the interface that received the message is in subnet 192.168.1.0/24, it will assign an address from the corresponding pool. You don't need to configure the router's own IP as excluded; it will know not to assign its own.
16:41 About DHCP D-O-R-A, I am not getting why in 'Request' stage the client sends broadcast destination message (rather than unicast destination to the server from where he received the Offer)
Hello! Thank you, Jeremy, for these amazing videos! Question: In your DHCP Relay Agent example, does R1 understand the DORA messages are to/from PC1 because of PAT via port #s? Since the source/destination IP address for PC1 is 0.0.0.0, I'm wondering how R1 understands the routing logic here and PAT is the only way I can think of this working.
Will you please give us an updated road map? How many videos do we have left? I'm about to be done with your course as of now. Then study a test dump and flash cards to pass. I enjoy video learning though and would like to know how much I'll be missing out on when I test at end of march.
The course will finish this year. By the way, don’t use dumps. They are exact copies of the questions and answers on the exam, and if Cisco detects that you have been using dumps you will be banned from Cisco certification.
@RUNNER 626 after further research they are actual copies of the test. I believed they were mock tests that could be studied. After further research your actually just memorizing real answers. That's not learning.
Hi Jeremy, thanks for the explanation. I have one question about the DHCP relay, in your video you said that when the router receive the Offer message on G0/1 interface it change it's source IP to 192.168.1.1. However, I read in the book Volume 2 page 127 and figure 7-3 that the source it still the IP of the DHCP server. Could you please clarify ?
Hey Jeremy, great vid, I appreciate all these videos. Just thought I'd let you know that when you go on the teachable, it says the course is 40 dollars but when you click to enroll it changes to 48 dollars.
Hi Jeremy, I follow your video tutorials with great interest, on the CCNA 200-301 course and not having an efficient command of the English language, I have always helped myself with the Italian subtitles, but for some time, I have noticed that they are no longer available (available, only English subtitles). I have checked the various options on RUclips for autoplaying subtitles and they are set correctly. I would like to know if this problem (for me) is due to some setting you have recently inserted in your videos. Thanks for your possible reply.
@@JeremysITLab thanks for the answer Jeremy, since this morning the problem has disappeared, now the car translated into Italian works regularly ..... the mysteries of the network ...... bye
Hi Jeremy i have a question if there is a centralized DHCP environment with multiple subnets / pools then how DHCP server will know which pool to use to assign IP to client since there will be requests from various parts or enterprise network and clients don't know their subnet to begin with
When the DHCP relay agent forwards the DHCP client's messages to the DHCP server, it includes information about the interface (which subnet) the client's message was received on.
@@JeremysITLab I normally studied only a few hours or so per class. Once I took CCNA this past semester, I was putting in 20-25 hours a week alone for that class. Thank god it’s over🙏🙏🙏
Hello Jeremy, Thanks a lot for all the videos; very helpful! Small question, I haven't found anything about the CCNA Examenx topic: 5.0 Security Fundamentals 6.0 Automation and Programmability Wireless Topic Do you treat them in other videos in the future? Thanks Good Job!
Hey Jeremy, your videos have been a big help. I have a question about the 'Network' command. Why is it that the DHCP network command uses a subnet mask, but dynamic protocols & ACLs network command uses the wildcard mask?
Jeremy, will the CCNA exam contain DHCPv6 items such as SLAAC, Stateful DHCPv6 server, etc.? The Cisco exam topics reference DHCP but they do not indicate DHCPv4 or DHCPv6. Thoughts?
Hello Jeremy thanks for such great tutorial helped me a lot on my job just have an urgent issue and wanted your opinion please I have dhcp server configured in my network and I have 2 scopes when I create the first one it works and provides ip addresses but when I create the second scope which is less in range than other one the whole dhcp stops providing ip for both scopes and the ones that got ip earlier will also lose ip if I disconnect and reconnect ethernet cable please help me its urgent thanks for your support and please note that I have DNS and sophos firewall in my network too
It seems the DHCP protocol could be improved upon. 1. There could be a function for DHCP multicast advertisement, so clients will join a multicast address and receive advertisements from the DHCP servers (or relay agents.) 2. There is no final ACK from the client to confirm to the server that it has actually configured the IP address. Also it baffles me that in CISCO IOS the excluded addresses have to be configured outside of the pool. Usually you would want to reserve ranges inside each pool individually(?)
When u have 2 dhcp clients and dhcp relay agent is outside of the network...when dhcp server assign ips to 2 clients is dhcp relay will swap that ips or not?
Hello Jeremy, I have a question with your dhcp offer Wireshark, if dhcp client didn't receive ip address before, Layer 3 destination address will be 255.255.255.255? The dhcp client can get their ip address in DHCP Ack message?
Whether or not the client has received an IP address before isn't what decides whether or not the offer is broadcast or unicast. It's the flag in the bootp flags field.
Hi, i was wondering why we don't see how to configure a server as a dhcp or dns server, because you said that using a cisco router as a server is so rare ? Thanks again for your amazing course ! I still can't believe it's free on the internet xD [edit] : oh and also i don't get how is the router gonna give the address of the right pool to the right subnet, i have trouble seeing how you would configure multiple dhcp pools
Thanks Jeremy for all those wonderful videos. I want to request one thing, I am preparing for CCNA Routing and switching exam, so can you recommend some book for this. Besides this, i find difficulty for finding topics mentioned in exam topics 5.0 Security Fundamentals and 6.0 Automation and Programmability. I could not find the proper resources and and don't know how deep I need to cover on those topics. I am expecting more videos on those topics from you and also if possible recommend books that covers these topics. I would highly appreciate your help.
Thanks again for your teachings. I bought the ccna 200-301 from todd lamle . is it beneficial and also i want to buy boson but i only see around 300 questions only.
How can I force DHCP to use a new ip address and not the preferred one ? example: someone blocked my ip address using a selfishnet software, what if I changed my ip address using DHCP to a new one could this be efficient ?
It depends on what kind of device you're using. Here are some methods for Windows: superuser.com/questions/470585/how-to-force-windows-7-to-ask-for-a-fresh-ip-address-from-dhcp-server
![Blox Fruits Dragon Rework Update [Full Stream]](http://i.ytimg.com/vi/EqDAp8udhm0/mqdefault.jpg)
Hello Jeremy, just want to let you know I passed the CCNA exam using your videos and other materials I purchased. Your videos helped A LOT, and the Anki app! THANK YOU VERY MUCH for making these videos and labs, keep up the good work!
Awesome, congrats! The CCNA exam is tough, well done. Glad to hear my videos helped :)
@Lai Ho. Congrats on the certificate! I am solely relying on Jeremy's course to study for now and I am following along quite well, but I am sure just this won't be enough to crack the exam, so could you recommend what other materials you used to study? Thanks.
@@tenzinrabten7018 I was wondering the same, I am pairing mine with Boson Net sim
@@tenzinrabten7018 how did it go? what did you end up using?
I just looked for 30min on youtube looking for some other channels/videos that explain DHCP, because I didn't completely understand something
There's not even 1 channel/video that i found that match Jeremy IT Lab, the closest was Keith Barker, and even he isn't a match for Jeremy's video.
Thank u so much Jeremy for this course and the CCNP, thank you for the time and effort u put in the course.
I hope everyone that is watching this course appreciate this amazing course and the fact that it's free for everyone to use.
I understand DHCP on a whole new level. Thank you
Thanks so much for the tip! Sorry for the late reply, just noticed this. I appreciate your support :)
Thanks Jeremy, I'm really grateful. I just passed my CCNA exam with score 959. I highly recommend your videos to get deep understanding. Merci beaucoup de Montréal
Congrats! CCNA is a tough exam, but that's an awesome score!
Hey Jeremy I passed my CCNA .Your videos are awesome .After passing I'm still reviewing your videos .
Thank you, Jeremy for your selfless service.
Thank you, Lanre :)
I can’t imagine how valuable these videos have been to my journey into networking. Priceless and by far the best RUclips vid on the CCNA. Thanks greatly for your selfless devotion to this course. If not for all others, you are a gemstone to me. Keep it up!
I can’t wait to see you tackle the new add-on topics on security, wireless and automations. I’m hopeful it would shot me into getting 95% prepared for the CCNA.
Thanks again Jeremy!
Thanks for the comment, really glad to hear that :)
Slides to print
3:45 dhcp purpose
4:40 what dhcp means
6:20 dhcp lease
8:10 dhcp release
9:00 dhcp Wireshark (port)
9:34 dhcp Wireshark (option)
10:00 dhcp renew
10:48 dhcp discover Wireshark
13:10 dhcp offer Wireshark
15:37 dhcp request Wireshark
17:08 dhcp ack Wireshark
16:56 4 messages
18:26 DORA
19:25 dhcp relay
21:10 dhcp relay how it works
24:25 dhcp server configuration
24:45 show ip dhcp binding
26:54 dhcp relay configuration
27:51 dhcp client configuration
28:08 dhcp command summary
Hi Jeremy, at the timestamp 10:43, the slide title is incorrectly shown as "DHCP Release" however it is a "DHCP Discover". Just putting it out so that it doesn't confuse someone going through the video.
PS - I already passed CCNA in the year 2021 by watching your CCNA series. Just rewatching them to revise the topics.
Thanks to your course in few weeks I start new job as a Network Support!
Congrats Marta, that's awesome! I'm so glad to hear you got a job in networking and my videos were helpful :)
I have been studying hard for the last few weeks, finally I reach the last video in the playlist :)). Really grad to join 2000+ people who are still learning at this point.
Welcome to the club! 😉 Thanks for following along!
Passed my CCNA today. Your video were very helpful. Thank you sir.
HI Mr. Bukas i would like to have a private conservation can you give me your LinkedIn id, or email id ?
Awesome, congrats! CCNA is a tough exam ;)
I'm a system administrator, and we use centralized WDS server to image machines, I always say configure IP Helper to the network team. I didn't know that easy. Thanks Jeremy. BTW I didn't watch just this video and I've been watching the whole series, even though I won't get the CCNA it's good stuff for understanding of network.
i find it kinda fun that you live in japan, i learnt japanese till n4 last year!
also as always, thank you for your materials! my exam is next month, if i pass itll mostly be because of your deep coverage!
The slide at minute 11 talking about DHCP discover messages, has "DHCP release" in the title. Just a heads up that might be wrong, since you're talking about discovery messages. Also, big fan of what you're doing here Jeremy. Thank you so much for these lectures!
That confused me as well, haha.
I tried this while following along on my pc and didn't realize id disconnect myself from the Internet, glad enough video had loaded where I could see the ipconfig /renew command!
please keep posting your videos as soon as you can, iam tending to get the exam in couple months. im counting on you Jeremy.
Good luck!
doing my ccna course, this week will be my final week for the course still need a lot of catching up to do, so far your videos help me understand more clearly, ive subsribe to your channel
Best of luck on the exam!
Thanks for putting this up Jeremy. COVID hit me hard and I have had a lot of trouble getting back to work. I responded to an ad on Indeed for a Cybersecurity Bootcamp that is highly selective as the training is paid.....They have a rigorous selection process. I have a few years on the helpdesk and a couple of courses in various things, but I do not consider myself a wizard. Between you, a couple of other vids and a small handful of books, I made it through selection to the tech interview. RUclips should know by now that your channel is a fantastic resource. Your explanations are clear, complete and concise, if I make it into this bootcamp you get a lot of the credit. Anyone reading this, the whole course is great, highly recommended. Subbed, liked and will sponsor/join. Thanks for helping me get back to work in a profession that I like. I will reach out to you through industry channels as well if I get in.
Hi Jeremey, i know i say this say this every Tuesday but thank you. Have actually discovered that am strongest in the topics you've covered in my ccna studies,
Thanks Frank, I appreciate it :)
I found these and just wanted to share:
DHCP messages are formatted in an identical way to BOOTP messages. Without the specific magic cookie, it would be impossible to differentiate between a BOOTP and a DHCP message. In fact, the fixed magic cookie present in the BOOTP message means that this is really a DHCP message, and everything that follows the magic number is to be interpreted as DHCP options.
The Bootstrap Protocol (BOOTP) is a computer networking protocol used in Internet Protocol networks to automatically assign an IP address to network devices from a configuration server.
Nice! Thanks for sharing
You are the BEAST of teaching the CCNA
Thanks Afakh! 💪
Thankfully Jeremy for all these videos. I feel very confident after listening your classes. I am waiting to listen about NATs. Also, Frame Relay.
NAT will come soon! Not frame relay though, that's not part of the CCNA anymore (it was removed a couple versions ago).
i am satisfied after investing my time in this video.....good work ....need more guidance in future from you..keep uploading
Thank you, new video every week!
Your time line is spot on with my schooling. We started dhcp end of last week.
Awesome, good timing!
Incredible work, Jeremy. Absolutely invaluable so far. I am a bit confused as to why some people think it's taboo to ask how much longer before the course is complete. I too have that same question to help me plan my schedule for the next several months. Again awesome content!
Yeah I understand why people ask! But it’s asked like 5-10 times on each new video I upload haha
It is a fantastic platform. Thank you for the efforts taken into simplified teaching!
Hello Jeremy and all mates, I have a question. At 20:20, why Src IP of R1 isn't 10.0.0.1 from g0/0 (the outgoing interface), since R1 send the unicast message from g0/0?
best ccna course on youtube ever. Thanks Jeremy
Hello Jeremy, thank you for this video!
Hi Jeremy, I really enjoyed watching your video today. My sincere thanks go out to you for all your hard work!
Hello Jeremy I just noticed at 10:36 that slide says DHCP Release when you're going over the DHCP Discover process / message type. Not a big deal but I just wanted to point it out.
"Let me demonstrate that visually" My ninja ^^
Thank you Jeremy for all you do. I can't stop watching your videos. They are so informative. Do you plan on creating CCNP materials?
Yeah, probably after the CCNA!
thank you sir, my ever wandering thoughts about cafe and airport wifi connections are wholesomely explained here. I learned a lot again.
Thanks you so much Mr Jeremy.. You teaching was easy to understand ... Hats off to you Sir
Thank you :)
At 21:35, I think MAC addresses should be included in the right-hand side of the messages. What are your thoughts?
Excellent video. Btw, the shortcut to open the network connection in Windows, type ncpa.cpl in the command prompt.
Thank you Jeremy, great as usual. Keep up the good work!
Thanks Alberto :)
During job interviews they usually hit you with basic troubleshooting questions, like using show version, BGP uptime, etc. Are you planning to cover stuff like this sometime?
Appreciate your great work!
Not BGP since it's not a CCNA topic, but I will do some more troubleshooting labs after I finish the course
@@JeremysITLab how far is this course still?
@@JeremysITLab How many more videos are we expecting? Thank you again so much for your help
I would've never guessed that Dora would make a cameo on a CCNA course.
Hello Mr jeremy, could you make a video course about STATELESS DHCPv6 and STATEFUL DHCPv6
Hey Jeremy, I think you mistakenly named the title ' DHCP Release ' instead of ' DHCP Discover' at 10:54.
בנאדם תותח עם המון ידע תודה על הכל!!
What a great video about DHCP! Thanks Jeremy. ❤
By the way that reference of DORA cartoon will be helpful 😂
In the screenshots at 25:25, is there a reason why the client ID in Cisco IOS is 0100.0c29.e727.39 but the physical address on the device is 00-0C-29-E7-27-39? Is IOS prepending 01 for some reason, or is that a mistake?
Thanks for this video Jeremy, it's very good.
22:34 is the bottom and top of excluded-address range inclusive or exclusive ?
Also, looks like to configure a Relay Agent, one must configure it per interface which could be cumbersome if a router has a lot of connected interfaces. Is there a way to make the Relay Agent so that it uses the helper address for all interfaces with an over-all command?
Thank you
Inclusive! So 192.168.1.1 and 192.168.1.10, as well as the addresses between, will be excluded.
Routers typically don't have many connected networks, and it's no more cumbersome than configuring the router's own IP address on the interface (just one additional command), so there isn't any global command for it as far as I know.
I love your videos Jeremy. You are a great instructor
Jermy It was good. IT could be great if you have explained more about Lease time and how it renew.
Thanks! There's a lot more that I could explain about DHCP, but you don't need so much depth for the CCNA. I recommend reading the TCP/IP guide for a more in-depth explanation: www.tcpipguide.com/free/t_toc.htm
Here's a diagram with step-by-step walkthrough: www.tcpipguide.com/free/t_DHCPLeaseRenewalandRebindingProcesses-2.htm
Thank you
very well explained, many thanks to Jeremy
The Explora' D.O.R.A. trying to get an IP Address from the DHCP Server! Very nice!
Thank you sir
I have one question about the DHCP Relay Agent
how could R1 g0/1 be the source rather than R1 g0/0 ?
and does the message go throught R1 g0/0 ??
Thank you
Great video as always! Could you eloborate on why it is rare for network devices such as routers to have their network config be provided through DHCP?
man am in love with your vids
Hi Jeremy, I would like to ask a question, when a single router act as dhcp server for more than one subnet, meaning it has more than one pool, which pool does the router know to give to a client? is it by matching the interface ip address which the dhcp discover message received on? and do we need to explicitly configure excluded the address that has been used for the router interface or does the router just excluded it automatically since the router know it uses the address, Thanks in advance Jeremy
The router will decide which pool to use by the interface the DISCOVER was received on. If the interface that received the message is in subnet 192.168.1.0/24, it will assign an address from the corresponding pool.
You don't need to configure the router's own IP as excluded; it will know not to assign its own.
Came to learn more about DHCP, left early to find the magic cookie.
16:41 About DHCP D-O-R-A, I am not getting why in 'Request' stage the client sends broadcast destination message (rather than unicast destination to the server from where he received the Offer)
It's so that all DHCP servers on the subnet receive the message and know which of their offers was selected by the client.
Hello! Thank you, Jeremy, for these amazing videos!
Question: In your DHCP Relay Agent example, does R1 understand the DORA messages are to/from PC1 because of PAT via port #s? Since the source/destination IP address for PC1 is 0.0.0.0, I'm wondering how R1 understands the routing logic here and PAT is the only way I can think of this working.
Will you please give us an updated road map? How many videos do we have left?
I'm about to be done with your course as of now. Then study a test dump and flash cards to pass. I enjoy video learning though and would like to know how much I'll be missing out on when I test at end of march.
The course will finish this year.
By the way, don’t use dumps. They are exact copies of the questions and answers on the exam, and if Cisco detects that you have been using dumps you will be banned from Cisco certification.
@@JeremysITLab thank you for that. I didnt know they were against the rules. I looked into it now. Flashcards it is then.
@RUNNER 626 after further research they are actual copies of the test. I believed they were mock tests that could be studied. After further research your actually just memorizing real answers. That's not learning.
From 10:36 to 12:45,headline should be DHCP discover instead of DHCP release
This section is handing me my own butt on a silver platter! I need a nap and a snack
Thank you, please I would like to know if the DHCP domain-name is the same domain name used for the RSA key???
Thanks for the video Jeremy! Very detailed and understandable
Thank you :)
Hi Jeremy, thanks for the explanation. I have one question about the DHCP relay, in your video you said that when the router receive the Offer message on G0/1 interface it change it's source IP to 192.168.1.1. However, I read in the book Volume 2 page 127 and figure 7-3 that the source it still the IP of the DHCP server. Could you please clarify ?
Just thanks man! You are the man
Thanks Glenn, cheers!
I've learned a lot. Thank you Jeremy 🙏
Hey Jeremy, great vid, I appreciate all these videos. Just thought I'd let you know that when you go on the teachable, it says the course is 40 dollars but when you click to enroll it changes to 48 dollars.
Some countries add VAT by law. I can't control that.
@@JeremysITLab Ah, I see. Will still get it soon once I'm caught up to the final video on youtube. Keep up the great work :D
Hi Jeremy, I follow your video tutorials with great interest, on the CCNA 200-301 course and not having an efficient command of the English language, I have always helped myself with the Italian subtitles, but for some time, I have noticed that they are no longer available (available, only English subtitles). I have checked the various options on RUclips for autoplaying subtitles and they are set correctly. I would like to know if this problem (for me) is due to some setting you have recently inserted in your videos. Thanks for your possible reply.
I'm not sure what the issue is! Auto-translate to Italian works for me.
@@JeremysITLab thanks for the answer Jeremy, since this morning the problem has disappeared, now the car translated into Italian works regularly ..... the mysteries of the network ...... bye
Hi Jeremy i have a question if there is a centralized DHCP environment with multiple subnets / pools then how DHCP server will know which pool to use to assign IP to client since there will be requests from various parts or enterprise network and clients don't know their subnet to begin with
When the DHCP relay agent forwards the DHCP client's messages to the DHCP server, it includes information about the interface (which subnet) the client's message was received on.
@@JeremysITLab thank you wasnt expecting such a quick reply 😁
Thank you Jeremy,
I learned a lot and benefited from your course. Btw, i passed my CCNA. God Bless!
Awesome, congrats! CCNA is a tough exam, I'm sure you studied hard for it
@@JeremysITLab I normally studied only a few hours or so per class.
Once I took CCNA this past semester, I was putting in 20-25 hours a week alone for that class. Thank god it’s over🙏🙏🙏
Thanks 🙏 Jeremy.Thanks from Denver,CO
Thanks for watching!
it does not take in /24 in packet tracer. you need to put in entire subnet mask to configure the subnet for the hosts .
Hello Jeremy,
Thanks a lot for all the videos; very helpful!
Small question, I haven't found anything about the CCNA Examenx topic:
5.0 Security Fundamentals
6.0 Automation and Programmability
Wireless Topic
Do you treat them in other videos in the future?
Thanks
Good Job!
I will cover all CCNA exam topics!
@@JeremysITLab thank you so much!
FALTA in 10:40 the slide should be named DHCP Discover not Release !!
Hello! Does a DHCP relay agent have a port number when it sends the messages, like the DHCP client (68) and DHCP srv (67)?
No, it doesn't change the port numbers
Hey Jeremy, your videos have been a big help. I have a question about the 'Network' command. Why is it that the DHCP network command uses a subnet mask, but dynamic protocols & ACLs network command uses the wildcard mask?
Jeremy, will the CCNA exam contain DHCPv6 items such as SLAAC, Stateful DHCPv6 server, etc.? The Cisco exam topics reference DHCP but they do not indicate DHCPv4 or DHCPv6. Thoughts?
Probably no DHCPv6, but I'm planning to make a video on it later just in case.
Hello Jeremy thanks for such great tutorial helped me a lot on my job just have an urgent issue and wanted your opinion please I have dhcp server configured in my network and I have 2 scopes when I create the first one it works and provides ip addresses but when I create the second scope which is less in range than other one the whole dhcp stops providing ip for both scopes and the ones that got ip earlier will also lose ip if I disconnect and reconnect ethernet cable please help me its urgent thanks for your support and please note that I have DNS and sophos firewall in my network too
Thanks so much, man❤❤
Aloha J , how any more vids til course is complete ??
The course is about 75% complete
It seems the DHCP protocol could be improved upon.
1. There could be a function for DHCP multicast advertisement, so clients will join a multicast address and receive advertisements from the DHCP servers (or relay agents.)
2. There is no final ACK from the client to confirm to the server that it has actually configured the IP address.
Also it baffles me that in CISCO IOS the excluded addresses have to be configured outside of the pool.
Usually you would want to reserve ranges inside each pool individually(?)
You can join the IETF and share your ideas with them some time! They're always updating old protocols and improving them.
@@JeremysITLab Perhaps some time, but as of now, I would feel like a nobody compared to their seniority. Maybe one day.
When u have 2 dhcp clients and dhcp relay agent is outside of the network...when dhcp server assign ips to 2 clients is dhcp relay will swap that ips or not?
Great work
Do you have any videos on DHCP snooping or DAI?
I will cover all CCNA exam topics!
Great series but you didn't hit on DHCP lease renewal
Thanks! This video focuses on what you need to know for the CCNA exam. It's not a comprehensive look at DHCP.
Hello Jeremy, I have a question with your dhcp offer Wireshark, if dhcp client didn't receive ip address before, Layer 3 destination address will be 255.255.255.255? The dhcp client can get their ip address in DHCP Ack message?
Whether or not the client has received an IP address before isn't what decides whether or not the offer is broadcast or unicast. It's the flag in the bootp flags field.
Hi, i was wondering why we don't see how to configure a server as a dhcp or dns server, because you said that using a cisco router as a server is so rare ? Thanks again for your amazing course ! I still can't believe it's free on the internet xD
[edit] : oh and also i don't get how is the router gonna give the address of the right pool to the right subnet, i have trouble seeing how you would configure multiple dhcp pools
Hello Jeremy, do u have a plan to cover dhcp conflict? Will it included in CCNA?
No plans for it
Is it no longer possible to put subtitles on the video? I saw your videos with subtitles in spanish :(
I didn't change anything...maybe youtube changed some default settings
helloo jeremy i am new joingning in. how may i have access to your anki flashcard
Great work.... Keep it up
Thank you :)
Thanks Jeremy for all those wonderful videos. I want to request one thing, I am preparing for CCNA Routing and switching exam, so can you recommend some book for this. Besides this, i find difficulty for finding topics mentioned in exam topics 5.0 Security Fundamentals and 6.0 Automation and Programmability. I could not find the proper resources and and don't know how deep I need to cover on those topics. I am expecting more videos on those topics from you and also if possible recommend books that covers these topics. I would highly appreciate your help.
I recommend the official cert guides, written by Wendell Odom and published by Cisco Press.
Awsome pure awsome love it
Thank you Yonatan! Always thankful for the support
hello dhcp ipv6 not covered in the ccna 200-301 ?
Hi Jeremy.. thanks for your helping and i want to ask why the release message is an ethernet frame? Why isn't it a packet
All packets are encapsulated in an Ethernet header/trailer to make frames!
Ah.. thanks.. I didnt notice
Thanks again for your teachings.
I bought the ccna 200-301 from todd lamle . is it beneficial and also i want to buy boson but i only see around 300 questions only.
Yep, Todd Lammle's books are great! So is Boson ExSim. It has 306 questions, 3 practice exams in total.
Thanks again.
Hello Jeremy ! I just want to ask Can you please share the lecture files/slides.
that's an extra on his Udemy course
How can I force DHCP to use a new ip address and not the preferred one ? example: someone blocked my ip address using a selfishnet software, what if I changed my ip address using DHCP to a new one could this be efficient ?
It depends on what kind of device you're using. Here are some methods for Windows: superuser.com/questions/470585/how-to-force-windows-7-to-ask-for-a-fresh-ip-address-from-dhcp-server
Do we need to know mac of a computer on WAN even if ip is known
No, the sending host just needs to know the MAC of its default gateway.