Free CCNA | NAT (Part 1) | Day 44 | CCNA 200-301 Complete Course

[@stardustmotion]

i respect the volition to always spell the 4 numbers of each ipv4 address since day 1

[@SwrPwr]

I believe Jeremy is the ONLY youtuber on this UNIVERSE that doesn't get any negative feedback on his/her channel; and it's needless to explain the obvious. Thank you, Jeremy!

[@Rwko.]

her? wtf. I like how you said "it's needless to state the obvious". So ironic xD

[@nawab256]

in the beginning u see over 1m views but by the end you only see 3k views in the end. these are the winners.

[@LuisRodriguez-wo6nl]

😂 so true !!!

[@DP-pf7ps]

My ccna class started with 20 now there are days where it's only two people in class. Not for everyone.

[@TheGreatLizardWizard]

Hey Jeremy, passed my CCNA with a 935/1000, couldn't have done it without your amazing video series and Boson ExSim, thank you for everything!

[@JeremysITLab]

Awesome score, congrats! Glad my videos were helpful :)

[@thewhistlehasbeenblown]

How long did you study for? (I'm currently on month 3 of studying and still don't quite feel ready just yet).

[@TheGreatLizardWizard]

@@thewhistlehasbeenblown About 6 months, if you steady yourself and really focus and balance out a well study schedule and use as many resources as you can, you'll score high on the CCNA

[@thewhistlehasbeenblown]

Thank you for taking the time to respond, I appreciate that and I'll definitely be continuing my studies daily, Warmly, Bill

[@TheGreatLizardWizard]

@@thewhistlehasbeenblown Ofc! Always happy to help out and give some input, I wish you the best of luck on your studies and the exam! :)

[@TheZaw100]

Jeremy no words can express how thankful I am for these amazing videos, I am happy to inform you that I have passed my technical interview at a Cisco partner and the guy who interviewed me said that I am better than 70 percent of applicants :D I am really excited for the job and I wouldn't have make it without your videos.

[@JeremysITLab]

Awesome, congrats! I'm glad my videos were helpful :)

[@carlosenriquelopezperez7269]

Jeremy thank u again, you can teach CCNA to a dog, IS AMAZING, A MASTERCLASS..... THANK U JEREMY, PEOPLE LIKE U, DESERVE 10000000 Of followers, you are doing something especial to have a better world.

[@JeremysITLab]

Maybe if it's a REALLY smart dog! ;)

[@rotrose7531]

This channel has become a go to place for people who learn networking. I cannot thank you enough for the tremendous work you have done for us.

[@StuartTufft]

I'm caught up! Time to start the reviewing process. You are getting very close to 100k subs Jeremy. I will be cheering you on towards this big milestone!

[@JeremysITLab]

That was quick! I think it's a good idea to take the time to review before going on to the remaining topics. Thanks, I'm stoked for 100k! Never expected the channel to get this far, but I'll take it :)

[@MiguelHernandez-zd7kr]

Thank you Jeremy! Lecture > Flashcards > Lab > Repeat... This is the may.

[@JeremysITLab]

I agree, it is the way!

[@robotname438]

0:00 - Intro & Things we'll cover 2:20 - RFC 1918 (Private IPv4 addresses) 7:42 - NAT (Network Address Translation) 10:23 - Static Source NAT 15:02 - Static NAT Configuration 20:18 - A few more useful commands 21:44 - Command review 22:03 - Things we covered 23:23 - QUIZ 23:27 - question#1 24:04 - question#2 25:11 - question#3 25:47 - question#4 26:31 - question#5 27:55 - question from Boson 30:56 - JCNP -Level Channel Members

[@NetworkBruh]

You are making great progress Jeremy. This course is awesome and best of all its FREE!!

[@JeremysITLab]

Cheers bruh! Wish I could catch your streams live, but due to the time zone difference I'm always working

[@preetidongave3616]

You are just great! In my 12 years carrier never seen such lucid explaination in all throughout series. You are developing network expert . We request you to please keep on sharing knowledge on more CCNP, CCIE, NEXUS, ACI . We will join your channel surely to follow. Thanks you so much!!!

[@VeryBigBang13]

I just finished the DHCP video and i was doing some googling about that delicious Magic Cookie when i got the notification. I'm so happy the videos are still coming up. Thanks Jeremy, you are the Best !

[@JeremysITLab]

Thanks, we're getting close to the end of the course! :)

[@faizaussi352]

You sure sacrifice a lot for us, thank you Jeremy.May God bless you.

[@JeremysITLab]

Thank you Faiza :)

[@thewhistlehasbeenblown]

Currently taking the OCG practice exams and scoring 764 (with 800 being a passing score according to the practice test itself) But I notated quite a few things I need to get clear on (NAT being one of them) because I was getting questions wrong - and I just wanted to take a moment to say... This video helped A LOT. Just watched it whilst taking notes and I finally feel like I actually understand the inside local, inside global, outside local, outside global IP addresses now. Thank you Jeremy, I really appreciate the help.

[@JeremysITLab]

Thanks Billy, glad the video was helpful!

[@knowledgemutitsve]

Currently on NAT. I am enjoying the lessons and still going.Thank you Jeremy.

[@weniweedeewiki.6237]

Not heard your voice today so i thought I'd get my daily dose

[@007finness]

Thank you so much for this complete course, Jeremy! I stopped reading the books for I am more of a visual and auditory learner. In this case, your videos while writing notes. I've gone through 10 chapters on the first book. Usually takes me 4 hours to read, highlight and write notes, take the included quiz. But, feels incomplete after all that. After switching to your videos, it only takes me 2 hours to write notes while listening to you, take the quiz, lab, and get through the flashcards. It might get longer once I get to the chapters I haven't read yet from the book. But, still better with the full package. By the way, how many more topics are you adding? I noticed how Day 44 was recently uploaded and doesn't have a lab yet. I made an excel sheet with corresponding day and check boxes for each topic, quiz, lab, and anki cards to keep me motivated and checked.

[@JeremysITLab]

Thanks, glad you like the course! You can check the progress here: jeremysitlab.com/ccna-course-progress

[@0wad]

I was always wondering what the private ip addresses were and how using those private ips would be able to send traffic over the internet before I even started this amazing course. I was wondering if I was gonna learn about it sooner or later in this course and I finally got to it and it all clicked instantly. Its such a great feeling!

[@ninosodicho382]

Sir, no words can express how thankful I am for these amazing videos

[@safwatramadan7640]

Hey Jeremy, amazing video series

[@ranjanadissanayaka5390]

Another topic learned successfully, thanks to Jeremy. The amount of time and commitment you have put in to making those videos are just mind blowing. 😀

[@dbest19330]

Great video.....this really cemented by understanding of inside local/global and outside local/global. There is no way I can mix it up after watching this. Bravo!

[@BalancednBeautiful]

hey Jeremy , your course is amazing and I am truly learning alot! Thank you for all you do and especially this fabulous content .

[@NetworkingwithHamza]

I was always confused that whenever I checked my PC's ip address or it's default gateway and tried to ping it or browse via internet. it didn't work. I was confused why is that so? Now I understand it. Thank you so much sir, you are a great teacher indeed

[@fwutter2701]

This is off topic but Jerermy, can you talk about your experience in Japan, how you got to be an english teacher there and land a job there as a network engineer. Great videos and thank you very much for making them!

[@JeremysITLab]

Yeah I'll probably make some videos on other topics like that after I finish the course!

[@mimiu395]

@@JeremysITLab When do you think to finish the course? I am prep for CCNA and I am nervous. Thanks for the videos. They are very helpful

[@NoorullahYaqoubi]

If two host in the LAN communicating the same server and using the same service on the internet at the same time, the traffic for both sessions from the external server will be destained to the same public IP address on the router. So, how NAT differentiate the session of two host in the LAN communicating the same server and using the same service on the internet at the same time? Is it uses the source port number? Please let me know if I am right :)

[@MohamedAchehboune]

Great content Jeremy. I'm grateful!

[@JeremysITLab]

Thanks Mohamed! I appreciate the support :)

[@kash9118]

It seems I'm almost getting there! Thank you Jeremy. Are you planning on covering topics in the new CCNA?

[@majiddehbi9186]

Oh i m so happy day by day we are getting. Close God bless u and keep helping People

[@JeremysITLab]

Thank you, Majid :)

[@jayasuryar5185]

@9:56 typo=R1 translates 203.0.113.1 to 196.168.0.167( it is 192.168.0.167)

[@glenntembo2693]

Thanks J, always a delightful learning from you.

[@JeremysITLab]

Thanks Glenn :)

[@TimeNeverWaits95]

On the exim question bruh... I automatically solved it with the translated address. I hope the real ccna exam will be more straightforward

[@okechukwudaniel1702]

Hi Jeremy, I can not thank you enough for your effort and contribution to the development of new and better cisco network engineers. Your free videos have practically taken me from level "0" to a level where I can now follow the conversation with better understanding and I thank you immensely for that, but there's still so much for me to do. I would like to buy the Boson practice questions to prepare for the CCNA exam but considering that I have no job, it's a bit challenging so my question is "How can one get a really good discount to be able to afford the Boson practice questions? As always, thank you very much for your support.

[@JeremysITLab]

Thanks for your message :) For Boson, you can use my discount code JEREMY15 for 15% off, or you can wait for their next sale (they have a 25% or 30% sale a couple times a year).

[@okechukwudaniel1702]

@@JeremysITLab Thank you Jeremy, I honestly wonder how you are able to do all these including responding to questions, it' amazing. Anyway, do you have any idea when their next sale will be and has there been any such sale this year?

[@gottapusimhachalam6788]

In sh ip nat translations command "__" refers to ? A.dynamic nat B.static nat C.active translations D.pat

[@aniswlidi2012]

Hi Jeremy. A small confusion for the addresses. Every thing is clear for the Inside/outside. The confusion comes from the figure starting at 11:10. How the 20.3.113.1 ip address comes in place when the Outside local address is 100.0.0.1?

[@Bowled.]

Ok It is just a separate network for the outer interface of router. It doesn't matter when it comes to static NAT , since static NAT uses one new public address and maps it with a private address. Hope you understand

[@robertroy1878]

Fantastic videos! Best series I've watched, and I've watched lots!

[@mhere7595]

Finally!! Thanks for all your content!! It is much appreciated! Clearest video course out there.

[@JeremysITLab]

Thank you :)

[@connoisseurofcookies2047]

23:58 Oh, is that Jeremy's cat in the background? 😱

[@letam7492]

Thank you for all video that you made , great teacher!!!

[@JeremysITLab]

Thank you :)

[@TheZaw100]

I always turn off adblocker as a thank. You and I surely will use bosom for my ccna exam:D

[@JeremysITLab]

Thanks Abed, I appreciate it :)

[@rafiebabkir1137]

you are the best instructor i like you way teaching all the best

[@محمدهاشم-ك5ل]

Mr Jeremy Thanks a lot for your effort your course is the best, I'm wondering if we can get the slides

[@exsata]

Thanks, man, just want to know when you will complete this video or course?

[@JeremysITLab]

Hi, the course will probably be finished in a few months. You can check the progress here: jeremysitlab.com/ccna-course-progress

[@NBAUsaisyourfather]

Jeremy Sir, thank you, 🏋 now I can answer to my doubt!! ❣️

[@puttupurajeswari4061]

Really your explanation was superb...Thanks. Hope you will do more videos on networking..

[@MusaTheGamer]

Thank your for producing these videos!

[@JeremysITLab]

Thanks for watching them! :)

[@sSavageGainSs]

Love your videos! Greetings from Colombia!

[@koffiali202]

teach in the Jeremy Mcdonald many times thanks

[@kamilovicftw6810]

Good morning from germany. Video 84, lets go! :)

[@AnoopKumar-ve7bf]

If you are here remember it’s 2024 and you have reached day 44. Just a few more to go.

[@Dbdjabsjsiifiwb]

then you get to fail the ccna and come back becuase you forgot to practice subnetting and thats half the questions

[@paulschneider2856]

We still trying to finish these damn lessons lol

[@AnoopKumar-ve7bf]

@@Dbdjabsjsiifiwb hahah I passed on July 27th :)

[@djthomassmith]

24:42 Could someone provide me the timestamp when Jeremy mentioned that "If you have already statically mapped a private IP address to a public IP address, if you try to map another private IP to that same public IP, the command will be rejected" earlier in the video? I can't seem to find it.

[@majiddehbi9186]

We are almost done with IP connectivity. It still only. Forwarding per hop behavior thx Sir and GOd blass u

[@JeremysITLab]

Thank you, Majid!

[@EmWu-gd5up]

16:14 you mention that these are public, privately owned IP addresses - I am still a newbie, but can someone shine some light for me, so is PKI used to be able to configure the static NATs for these privately owned IP addreses? Also, in 24:40, there is a way to modify/reconfigure a statically NAT'ed device to a different public IP address correct? You mention that it is not possible to map two devices to one public IP address, which does make sense - but, if we release that public IP address, then we are able to remap this static NAT address to another device? Correct? Am I understanding this? Thank you!

[@thecaveman123]

If you wanted to, could you just assign the public IPs that you purchased directly to the hosts, so you wouldn't have to configure any static NAT translations? Would there be any negative sides to this?

[@gowthamshanmugam6988]

Thank you very much sir... Love from India🇮🇳

[@JeremysITLab]

Thanks for watching :)

[@joycegeorge7947]

U r awesome...... Looking for more videos.... Include new portions in ccna such as security... Thnku😍

[@JeremysITLab]

New video coming every week :)

[@EduardPetrov-j2n]

Awesome video and great complex question from Boson ExSim

[@Flying_turnip187]

This was a great lesson! This confused the hell out of me. Thanks!1

[@Christians9955]

source and static NAT are the same thing, correct?

[@manikandanrajkumar6695]

No, Christian, it's not the same. In the source NAT, the router will use a single public IP (own interface public address) for all the PCs that it's connected to. But in static NAT, the router uses one to one mappings for the local hosts which means it wont use its own interface IP address instead we have to configure the address that PCs gonna use with a help of " Ip nat inside source static " command

[@dhanajon5528]

static means a one to one translation, while source means the source ip is translated.

[@udarasalgado4171]

Hi, Quiz no : 02, in the packet tracer I have tried to NAT different Inside Local IP addresses. And it allow to do it. Once I send sh ip nat trans command it's show the most latest Inside Local IP address.

[@JeremysITLab]

Packet Tracer isn't 100% accurate

[@emilianobogliacini4269]

Hi Jeremy, wanted to thank you for this great course you put together, it's helping me a lot in reviewing the CCNA topics before my exam! By the way, would it be possible to know how many videos are left in order to cover the full CCNA topics list? Thanks in advance! Also, I have a doubt about the following STP flashcard, could you please check it and confirm the answer is correct? Configure a switchport as an RSTP edge port: SW1(config-if)# [...] > spanning-tree portfast thanks again

[@JeremysITLab]

Hi Emiliano, I'm not sure how many videos are left, but you can check the course progress here: jeremysitlab.com/ccna-course-progress As for the STP flashcard, it is correct! Check out the RSTP video for clarification.

[@emilianobogliacini4269]

Thanks a lot Jeremy!

[@qasimshido]

Ohhh yeeeeeees!! Finally. Thank you very much sir.

[@JeremysITLab]

Hi Qasim, thanks for watching :)

[@anwarahmed5342]

Thank you 🙏 awesome tips, Everything is clear here, voice video, explanation We appreciate.

[@JeremysITLab]

Thank you :)

[@AH-hs7di]

Hello Jeremy_IT, thanks a lot for the videos! I wanted to ask about 21:05, you said if you want to remove IPs that are Inside global, and Inside local, you have to remove the "ip nat inside source static" commands, but the question here is, how to remove those commands, with what command? I am sorry for my ignorance. Again ,THANK YOU for the videos, they are extremly helpful.

[@JeremysITLab]

In Cisco IOS you can use ‘no’ in front of a command to remove it

[@AH-hs7di]

@@JeremysITLab Thanks a lot!

[@dannymihaylov7958]

Can you please explain how the reply from 8.8.8.8 is going to reach R1(203.0.113.1) and then be translated back to PC1(192.168.0.167) when 8.8.8.8 reply destination IP (100.0.113.1) has nothing to do with the R1(203.0.113.1). They are not even remotely close public IPs

[@JeremysITLab]

Please include the time in the video so I can answer your question

[@dannymihaylov7958]

@@JeremysITLab First, thank you very much for the crazy fast reply. You are just amazing! The diagram of the network down there stays exactly the same for a very long period of time, but maybe the best moment to see is at 13:12 with R1 G0/1 (192.168.0.1) and G0/0 (203.0.113.1) and the server on the right after the "internet cloud" is 8.8.8.8. I just don't see how in this diagram case 8.8.8.8 will be able to reach R1's G0/0 (203.0.113.1), when the 8.8.8.8's Dst: is 100.0.0.1, which has nothing to do with 203.0.113.1

[@danydany3974]

hi jeremy any advice how to learn devnet. can you please do lecture on.

[@JeremysITLab]

Sorry, I don't have the DevNet certifications so I can't give advice about them.

[@knowledgenemhara7598]

I was wondering if you have notes that go with the videos; if you do, where & how can I get them?

[@JeremysITLab]

No notes, I recommend taking notes as you study!

[@leustad]

Hey Jeremy, how does the R1 knows which private address it needs to translate to? 10:24 is there an indication in the frame or R1 holds a table to correlate these IP addresses OR is it assumed that this is static NAT?

[@JeremysITLab]

R1 keeps a table of the translations. You can see it at 15:04, for example.

[@shahzebraza1903]

Thanks sir for giving such a wonderful information about CCNA love from Pakistan

[@JeremysITLab]

Thank you, I'm glad you like it :)

[@samirsamir7779]

hello Jeremy , great as usually , thank you :)

[@JeremysITLab]

Thanks Samir :)

[@qasimshido]

Ohhh yeeeeeees!! Finally.

[@chris33006]

Do i need to remember the IPv4 private address changes for the CCNA exam?

[@JeremysITLab]

Yes, definitely!

[@deepbaban6864]

Are Official cert guide ccna 200-301 books are enough for ccna. Does they cover all topics for ccna

[@JeremysITLab]

Yes they are very good!

[@irfankhalifa5647]

Hi Jeremy, thank you for some awesome videos... Just subscribed and will be going through all the videos... I know course is still in progress but do you know how many days roughly it will be or how many days I need to watch to go for ccna exam? Thank you once again...

[@JeremysITLab]

Roughly, maybe 60 days in total!

[@NetonaAustralia]

If the inside IP address does change. Need we adjust the router with the new IP address, is that right? If yes, I assume it's advisable that local IP's must be have in a static network.

[@HaohmaruHL]

So, this Inside Local/Global and Outside Local/Global system looks similar to having a local ID document (like driver's license) and a passport for foreign travels, right? If you go abroad nobody cares about your local driver's license, it doesn't really prove anything since each country has their own ID system. So you have to show a document valid abroad which they can identify you by, like your travel passport with visas inside etc. Then, when you get home, you can use your local ID again. From the perspective of your country your driver's license would suffice, but from the perspective of other countries you need a document valid globally.

[@-b777ljq3]

very clearly explained, very good, quiz questions are very helpful

[@deepbaban6864]

How much time will it take to prepare for ccna if I start from beginning?

[@JeremysITLab]

I think the average is 4-6 months.

[@gurmeetsingharora2003]

Very Very nice and well-prepared videos...any plan for CCNP videos?

[@JeremysITLab]

Yes, after the CCNA course is finished!

[@alainpopsoul9444]

@@JeremysITLab when do these courses will finish please. Forgive my english, i'm trying. I speak french normaly

[@alainpopsoul9444]

i thank so much for all... i study ccna with your courses easily even if it is in english. Very well done

[@franksoko02]

As always thanks Jeremy am sure its full useful information thank you in advance

[@JeremysITLab]

Thanks Frank :)

[@umairm8595]

Thank you Jeremy this is very helpful

[@JeremysITLab]

Thanks Umair, glad to hear it

[@bluechickencolos3680]

This is pretty cool stuff even if you’re not someone who wants to do this for living

[@konefine3626]

What a great explanation, even kindergartener may understand networking with Jeremy's IT Video lol 😊

[@jackd9259]

JEREMY THE GOAT

[@DevOpsPulse]

thank you

[@juanmartinayonacarrera2190]

Hi Jeremy thank you for vieos.

[@JeremysITLab]

Thanks for watching, Juan :)

[@konstantinepanin3146]

Thanks for your work!!!

[@JeremysITLab]

Thanks for watching :)

[@eminkarimov2675]

Thanks Jeremy!

[@JeremysITLab]

Thanks for watching and leaving a comment, Emin :)

[@markfuentes3666]

Thanks again

[@srivishnukarikalan1442]

Hey Jermey reached Day 33 of your video just wondering how many more videos for this series to end coz planning to take the ccna exam 2 weeks from now.

[@JeremysITLab]

Hi, you can check the progress of the course here: jeremysitlab.com/ccna-course-progress

[@dhanushm.s9608]

Thany you jermey .Pls start wireless class

[@JeremysITLab]

I'll cover the wireless topics near the end of the course, before automation

[@pawnshop_ghost]

For anyone with more understanding than me: what is the real world use case for static NAT? If the purpose of NAT is to conserve IP addresses, then having 1:1 mappings seems counter productive, right? So I assume there's something that I am not understanding here

[@dhanajon5528]

I assume when you made this comment you haven't yet reach the part where Jeremy already addressed that.

[@pawnshop_ghost]

@@dhanajon5528 I assume you made this reply to my comment before finding the one where I said that I passed the CCNA. I wish you luck on yours.

[@dhanajon5528]

@@pawnshop_ghost Well, yeah? How is that relevant? Thanks for the good luck though.

[@ajingolk7716]

Hi jeremy i have a question please answer it, what is the difference between: - NAT. - DHCP IP helper-address. - routing. I am lost please help.

[@rikhiramrana4977]

Hi Jeremy I have just started to watch your video and it helps me also but I haven't found a link of flashcard for dowmload

[@JeremysITLab]

Top line of the description: Free CCNA 200-301 flashcards/Packet Tracer labs for the course: jeremysitlab.com/youtube-join/

[@Laevatei1nn]

cant we make a route to the destination network? is it possible?

[@JeremysITLab]

Sorry I don't understand, can you explain your question more? Every route is a route to a destination network.

[@LuisRodriguez-wo6nl]

This is by far the 2 ND most effective video I've seen on the subject which is pretty important in my opinion and often gets neglected by IT staff in general.. except the ones that really know it functions. I gotta give you a Congrats to your channel, its gonna sound strange but the way Eurpean Engineers explain Network topics in general is far better than their American counterparts.. that's just my humble opinion... 🏆🏆

[@multibatmam1]

Hi Jeremy, thanks again for the amazing content. I will do my CCNA first try in 31 of this month. Just one question, is it okay to say the following? - Inside Local → Original Source IP Address - LAN perspective - Inside Global → Translated Source IP Address - WAN perspective - Outside Local → Original Destination IP Address - LAN perspective - Outside Global → Translated (if translated) Destination IP Address - WAN perspective

[@MHALAPOW]

Thanks, very useful

[@JeremysITLab]

Thanks :)

[@Tegriidy]

Guys I failed my first attempt sadly just shy of 82.5% at 80.5%. I have felt de-motivated but have since started studying again to tackle the exam. 1 topic I have struggled to understand and get back into is NAT Translation For example: I had a question asking What the Source IP is after showing the output of the command show IP Nat Translations that I know I failed since studying. What I am not understanding is after some investigating and research I picked the inside local address as the source when in fact it should be the inside global. I don't quite understand this as the traffic would originate from the local private address - be Natted to the Public Inside Global address and so on hence why I picked the inside local as the source address. Can anyone explain this to me? Does this command display the outpu always from an internal to external Point-Of-View? (Inside traffic is always the source vs Outside if always the destination) or can it be reversed?