Free CCNA | OSPF Part 1 | Day 26 | CCNA 200-301 Complete Course

[@JeremysITLab]

ERRATA: At 21:33 I mention /28 masks regarding R1's G0/0 and G1/0 interfaces. Should have said /30 as written on the diagram and the command output.

[@fritzdamiendengambog9169]

Please your definition of ABR is it correct?it should not be router with interface connect to the backbone area and to at least one other interface?

[@JeremysITLab]

@@fritzdamiendengambog9169 My definition is correct.

[@fritzdamiendengambog9169]

@@JeremysITLab ok thanks

[@THEGREENAPPLEKID]

i was so confused lmaooo

[@randyhollandsworth626]

Caught that! 🙂 Was coming here to add a comment. I figured someone would have beat me to it... Glad they did. Thanks for doing these labs Jeremy!!

[@vernerheisenberg8900]

I encourage EVERYONE to go buy the official course!!! I enrolled in an university that offers Cisco’s courses before i found these videos. The professor at the college institution , in charge of the lectures is NOT on par with Mr. Jeremy. I am not exaggerating! During my studies as an electrical engineer, I have not encountered another person with such profound understanding of the concept , like Mr. Jeremy. I don’t know how the guy does it. Great communication skills and vast knowledge!!! Great job!

[@Arctic-fox717]

He does it from the heart!

[@BAKABULINDIREYMOND]

Thats true.

[@amakaraphaeludeh7747]

He is the best

[@denzeltomo4565]

❤

[@parker73724]

I'm confused, why'd you encourage people to buy the official course if you believe Jeremy is the best course?

[@Aquahal93]

These videos are actually better than a lot of the paid ones I've watched.

[@mohameddirir5324]

i agree

[@imjinaah]

0:01 Introduction 1:11 Things we'll cover 2:03 Review - Types of Dynamic Routing Protocols 2:43 Review - How Link State Protocols work 3:52 OSPF 5:41 LSA Flooding 8:25 Basic Proccess of OSPF 9:08 OSPF Areas 15:52 OSPF Areas Rules 18:44 Basic OSPF Configuration 22:26 passive-interface command 23:25 advertise a default route into OSPF 24:17 show ip protocols 29:05 Things we covered. 30:10 QUIZ!

[@JeremysITLab]

Thanks! Added to the description :)

[@VictorKehinde-i6m]

I passed my CCNA today. Special thanks to you for your video. I'm really grateful 🙏🙏🙏

[@obsesivegamer]

congrats bro! ✊👊🤛🤜

[@-b777ljq3]

so far Jeremy is the best teacher I found in teaching network course online, really hope you can expend your teaching in firewall stuff.

[@mohammadrahal9746]

what a comprehensive introduction to OSPF , amazing as usual Jeremy

[@JeremysITLab]

Thanks Mohammad, glad you like it :)

[@NetworkingwithHamza]

Excellent video series. Consistency is the key and it is the hardest thing to achieve. So many distractions are existing around us. I stopped this series almost 2 times but then came back with more passion. I am planning to finish till video 30, then print out all ANKI Flashcards ( I prefer traditional way to memorize stuff. I have converted Anki flashcards into a pdf file of 309 pages from day 1 to day 63) Then memorize all ANKI flashcards, do all the labs without watching any video (unless I stumble upon something or to verify if I have done the lab correctly) or using notes. Then continue again from Day 31. Day 45 to 63 will be easier for me as I have already completed Cisco CCST (Cybersecurity Pathway) on Netcad. Thank you so much Jeremy. I realized if merely watching these videos require so much consistency. How much effort was required for you to create this course. Salute sir.

[@Luprikons]

Doing your lectures with screenshots to my iPad on Notability and writing down a lot of notes on Joplin in 2023 whilst having been working for some time in the telco-industry here in Finland, and just absolutely bravo Jeremy. What a treat these videos are.

[@muhammadjunaid9693]

Wow! This is called a perfect CCNA Tutorial......Thanks to Jeremy for putting complete effort.

[@JeremysITLab]

Thanks Muhammad :)

[@muhammadjunaid9693]

Waiting for the next one?

[@santanabjj8554]

The best course on the web. Way better than the paid courses!!

[@phoelinux3111]

Absolutely true! I waste a lot of money until I discover Jeremy!

[@fernandotorres7489]

great explanations, I just recently landed a job as a NOC technician for an ISP and your course has definitely helped me get prepared for my ccna and feel more confident about my soon to start job, keep up the good work

[@JeremysITLab]

Well done! NOC technician is a great start for a networking career,

[@franksoko02]

I know we are not grading the lectures but the ospf series has got to be my all time favs. Iearned ospf after viewing them.

[@JeremysITLab]

Thanks, glad you like them!

[@rotrose7531]

Your tutorials are legendary, you make the whole networking concept so clear that it does not only help us to pass CCNA, but this series does have practical significance that I already use the concept you teach here to do real networking. I can not say enough thanks to you.

[@monetka79]

Jeremy, I would like to confess, I completely fall in love with your videos, such a great job! Thank you many - many times! 🙏🙏🙏🙏🙏🙏

[@JeremysITLab]

Thank you Alyona, I'm glad you like them!

[@shlomiunger3518]

Yeah, we all fell in love with him at first lecture xD

[@ataulaleemqureshi608]

@@shlomiunger3518 me i guess the most who fell in love :)

[@twanaahmedbrno6204]

Mr. Jeremy wish you all the best, I think actually everyone who watches your videos don't know how to thank you because your videos are adorable and we can understand easily, your videos are inspiring me to not give up and keep going on learning network, I just wanna thank you from my deep heart, I just download all but dont worry like all and viewer of all . i am asking you to keep going if anything happens you ave to or must complete this course because we need it and need your help I appreciate your all videos and thankful with all my respect my teacher TWANA AHMED BRNO from Kurdistan

[@JeremysITLab]

Thank you so much for your kind words! Don't worry, I won't stop until the entire course is complete 👍

[@glenntembo2693]

Jeremy Jeremy! JJ oh man you have done it again, your lessons keep becoming sweeter and sweeter. Detailed, no stone left un-turned. Thanks for the theory. Haha unfortunately got one quiz question right. It will all sink eventually. Thumbs-up dude. You the man. Can't wait for the lump some notes from video 24 or 25. I subscribed (smiling!)

[@JeremysITLab]

Thanks as always Glenn, glad you like the videos :)

[@TheCommanderKIA]

Q2:10.0.8.0 0.0.3.255 matches IP addresses 10.0.8.0 to 10.0.11.255, so it doesn't match either of the interface IP's.

[@rafikaamzad5040]

I have visited several KZbin channel but I believe this channel is best, here we can not only see video tutorials but also get exercise files, thanks a lot Jeremy for your hard work

[@JeremysITLab]

Thank you Rafika :)

[@chrollolucilfer1794]

Hello Jeremy i would like to thank you for making all these wonderful videos! I am currently a college student and my program has a computer networking subject. All this videos made me understand and love networking. I was able to pass my labs and exams and have gotten excellent marks! Im looking forward to take ccna after college and be a Network Engineer. Thank you!

[@OpenSourceHocam]

Hi Jeremy I passed my CCNA yesterday 😅 I appreciate you your videos helped me a lot. My English was not so good but I understand all of your videos clearly.

[@ptahrightknowledge3813]

Could you share your other resources you use to pass your CCNA, please

[@LynksysMD]

Thank you for this covering of OSPF. I've been working through Neil's Udemy class and its for the most part good but I had to try something else for his OSPF coverage and this has been exactly what I needed thank you Jeremy.

[@goofy_xf6223]

Are you studying for ccnp yet? If you are or aren’t ospf gets more complicated 😂 BUT Ben piper on Pluralsight will take care of you. His course is pretty damn good

[@ActionzvanNeshie11]

Thanks so much my best tutor so far in Cisco Networking. Kudos to you Jeremy

[@JeremysITLab]

Thank you! I'm glad you think so :)

[@ranjanadissanayaka5390]

Hey Jeremy, thanks so much for making these videos and labs and flash cards available for free. I used the flash cards for this video and it helped me a lot to understand and really remember the content. So thanks again.

[@Fink87]

Thanks Jeremy, OSPF and Automation & Programmability are my two remaining topics, once I've those nailed down I'll try again after getting an 817 on my first go.

[@JeremysITLab]

817! So close! Brush up on your weak spots and you'll definitely get it next time. Days 26, 27, and 28 should teach you all you need to know about OSPF for the exam, so stay tuned 👍

[@Fink87]

@@JeremysITLab Yeah I stupidly thought I could get through just on my net+ studying and a small bit of real-life experience, but as above those two topics were where I slipped up. Trust me I will be tuning in! Appreciate all that you do Jer.

[@GovandMkarim]

u got 817 out of 1000 and failed in CCNA?

[@Fink87]

Yes, in 2021 - IIRC it was 900 to pass, whats the query?@@GovandMkarim

[@osematouati2430]

hands down, best ccna contente out there + it's free, thanks a bunch.

[@hashanbhushitha9121]

Clean information, well structured and on point.thank you jeremy you are a life saver.

[@travelandexplorebd8962]

Happy to spend time viewing legendary video clips. being a non-IT person getting to move to a new world.

[@SA-zs4nm]

Hey Jeremy. Sam A. from AR, USA. Thanks so much for all your videos. You have an excellent method of teaching and explaining everything in such great detail. I especially enjoy the quizzes at the end. Appreciate all your efforts.

[@リンゴ酢-b8g]

In multi-area OSPF networks, all non-backbone areas must have an ABR connected to area 0. 2 OSPF routers with different process IDs can become OSPF neighbours. The OSPF area must be specified in the network command. An ASBR connects the internal OSPF network to networks outside of the OSPF domain.

[@LowerYourExpectationsPleb]

You're a saint Jeremy. I'm also looking out for the next parts of OSPF. Today I'll apply for my dream network engineer job. Hopefully I'll get to see you full OSPF training before I reach the technical interview :D

[@JeremysITLab]

Thanks! :) OSPF will be three parts (I just finished writing the script for part 3), so six videos in total (lecture + lab for each part). Good luck on the interview!

[@obama5057]

@@JeremysITLab hi jeremy, please when will you complete the CCNA vidoes? how many more videos remaining? Thank you for your effort.

[@islamtoghuj]

10:22 that noise indicates that you adjusted your position on your seat, and that made me feel closer to your physical space, Sensei.

[@JeremysITLab]

Haha, awesome comment!

[@praisebetoyourCreator]

You said the truth he's a real SENSEI but also he's on his way of becoming a Hokage!

[@pauljennings5994]

Very Impressed with these videos. I'm using as a refresher before starting study for the CCNP and i'm finding them great. Thanks!

[@omidsupply9550]

Wow! One of the best and elaborated clip along with simulation lab that is a great lead to CCNA vendor test. I highly recommend. I can't thank you enough! 100% 💯💯⭐🌟💫🌟⭐

[@karanSharma-wf6uu]

Hi jeremy at 21:14 you said, 'the network command is used to tell the router on which interfaces to activate the OSPF on', but i think this command actually enables OSPF on these interfaces but also only advertises the routes which you mention in the network command . Corect me if I'm wrong, thanks!

[@multibatmam1]

Man, I came to the same conclusion. Did you confirm it any other way?

[@guruteja164]

​@Jeremy's IT Lab.... i have gone through your CCNA videos, you have explained nicely!! . . . Kindly make videos on interview questions on some important L2 & L3 protocols, it would be very helpful for many ppl who are trying to attend networking interviews.

[@JeremysITLab]

Thank you! I will consider other video topics after I finish the CCNA course!

[@arturaliyev9671]

Thanks for this wonderful course!!! I wanted to say that the ID router can be specified as 0.0.0.1 for R1, 0.0.0.2 for R2, etc. not to be confused with IP addresses

[@JeremysITLab]

Yep, any 32-bit number works.

[@muffinbutton1484]

There's no way you are only 50-60% done with this course.. That would be an insane amount of content. I would assess 75% but you know better than we do I suppose.

[@JeremysITLab]

Check out the exam topics list: www.cisco.com/c/dam/en_us/training-events/le31/le46/cln/marketing/exam-topics/200-301-CCNA.pdf I haven't covered sections 4.0, 5.0, or 6.0, as well as IPv6, TCP/UDP, wireless, etc. The CCNA is a very big exam!

[@muffinbutton1484]

@@JeremysITLab Well based off of their percentages that means you have covered 65%... not too bad! Keep it Jeremy! We support you bro!

[@IlliaFokin]

Thank you vey much for your efforts! Could someone please explain the calculation process in Quiz 2?

[@perrku2730]

i had to watch the video twice to fully understand this topic but it was worth it, thanks

[@chrislam9794]

when the screen shows the config. mode and interface , the reference topology diagram should be shown too . That will be easier to understand .

[@ShoaibAli-qi1bw]

Brother you are like a AI in my life love you and God bless you

[@styzicmuzic]

Hi Jeremy, can brief about quiz 2 please? i'm lost

[@chrislam9794]

hey Sir, I found your explanation just so great and clear . The best so far .

[@enastase8203]

Clean information, well structured and on point. Great job Jeremy.. Thanks for your help..

[@JeremysITLab]

Thanks, Emil :)

[@mannaryoutuification]

when this course will be completed and we seek for another courses from you ❤️

[@JeremysITLab]

Thank you :) Next is probably CCNP Enterprise!

[@rafikaamzad5040]

I am following prepmock.com/exams along with this channel

[@IrnBrummmmmmm0]

@@JeremysITLab i assume the enterprise is a ccnp route just like the ccna used to be before the combining of all the ccna routes? Any specific reason why you will teach enterprise?

[@novinpradhan7629]

Thank You Jeremy. You are awesome. Keep teaching. God bless you. Awaiting more videos.

[@JeremysITLab]

Thank you! Glad you like the videos :)

[@GGiggler]

Hi Jeremy at 32:13, can you explain why is the answer C? i've always struggled with a range of host and their wildcard mask. Do you have any lectures on these? a range of host and their respective wildcard mask

[@TheCommanderKIA]

10.0.8.0 0.0.3.255 matches IP addresses 10.0.8.0 to 10.0.11.255, so it doesn't match either of the interface IP's.

[@Jinvisualz]

Thank you for these videos! Can you go more in depth on how you figured out the answer for Quiz question #2.

[@TheCommanderKIA]

10.0.8.0 0.0.3.255 matches IP addresses 10.0.8.0 to 10.0.11.255, so it doesn't match either of the interface IP's.

[@papajohnscookie]

Your course and labs are great, thanks for the study material

[@ramdogproductions]

The visual really help. THNX Jeremy!!

[@JeremysITLab]

Thanks for watching :)

[@truthspeaks651]

Great video on OSPF. Your explanations are on point. Thank you for your high quality product.

[@JeremysITLab]

Thank you, I'm glad to hear that :)

[@creedolala6918]

For me, this was the first one where the material was a little lacking to sufficiently answer the exsim question. Maybe I missed something, but I don't remember hearing anything about redistribution, or the fact that the default originate command automatically makes a router an asbr. I also had the impression that all directly connected routes were advertised when you use that command. I'll have to watch again.

[@markobarbaric7434]

You nailed it again! Keep up good work!

[@JeremysITLab]

Thanks Marko!

[@shlomiunger3518]

Gotta love them wildcard masks!!! Another awesome lesson! xD

[@JeremysITLab]

For most students it's 'gotta hate them wildcard masks!' Glad you like them! :)

[@YTBurner]

In the sample topology at 12:11, (1) Can you also add a point-to-point connection between the routers of Area 1 and Area 2 since both are already connected to Area 0? (2) Can you add another router in between those areas then you'll have interfaces connecting to Areas 0, 1, and 2?

[@JeremysITLab]

Yeah, both are possible.

[@beajanos9277]

Hello Jeremy! I am doing the Cisco NetAcad at my uni, and your materials are really great for understanding networking!!! Thank you very much !! I have one question though regarding wildcard masks...I dont understand why we dont use the usual subnet masks for choosing or eliminating certain ip ranges on the router in ospf and other protocols. At uni, my prof said, that when routing and forwarding, the router does a logical AND operation on the destination ip address and the respective subnet mask to determine to which network the packet has to be forwarded. To do the AND operation with the subnet mask, where the network bits are written as 1s and the host bits as 0s just makes sense since 1&1 = 1 and 1&0=0 . But if we use a reversed subnet mask a.k.a a wildcard mask AND operation does not deliver the right result...so...why bother using wildcard mask in ospf, and which logical operation (or serie of operations) is used in the router to apply wildcard masks on addresses?

[@Alberto.81]

Thank you Jeremy for all your efforts. Keep up the good work.

[@JeremysITLab]

Thanks Alberto :)

[@joshtate6476]

I am really struggling with questions like Quiz 2. Could someone please help me?

[@multibatmam1]

Hi jeremy at 21:14 you said, 'the network command is used to tell the router on which interfaces to activate the OSPF on', but i think this command actually enables OSPF on these interfaces but also only advertises the routes which you mention in the network command. Because if you don`t do the "network" command to a given interface, it will not advertise the subnet it is connected to the other routers. Correct me if I'm wrong, please! And Thanks for your amazing course! I also bought at Udemy, but here there are Boson questions and labs.

[@JeremysITLab]

Hi Lucas, It doesn't advertise the route in the 'network' command, it activates OSPF on the interface and advertises the network of the interface.

[@sauvus]

Nice video. The amount of detail is perfect.

[@JeremysITLab]

Thank you :)

[@jsleezy914]

thank you sooo much for sharing this whole course bro and making it accessible to EVERYONE..u are truly a blessing to this world man, wow!! I just watched ur David Bombal interview too yesterday man, really really inspiring stuff being that u just picked up this stufff a few years ago back and u explain it at expert level already dude!! love it!! thankful/grateful as FFF!!! thanks Jeremy !!!!!!!!!!!!!

[@maxwellchessdotcom6952]

Listen up! I want to welcome you to Jeremy's It lab!

[@Laevatei1nn]

@Kace Seth dont tell me you actually believe that

[@jzero1579]

@@Laevatei1nn That's a bot.

[@Laevatei1nn]

@@jzero1579 lmao how stupid of me

[@mouadjadil9430]

hello Jeremy, hope you're good! I heard many people talk about configuring dynamic routes for close routers and static for far one's, I didn't get it :(

[@gorzaryan]

Hi Jeremy, As far as I know there is a Virtual Link in the OSPF protocol which allows you to connect two ares bypassing Backbone area. It is not recommended, but it is possible. P.S. Like others, I love your courses, thank you so much!

[@VoidRavenDC17]

This is so much easier to understand than my teacher, much easier to understand with a visual component

[@صالح-ح2ز]

Thank you, may Allah help you in your life. We await the next video.

[@JeremysITLab]

Thank you Saleh :)

[@BeyondTheCosmos17]

@@JeremysITLab Hi Jeremy first of all thank you for your training for CCNA i am trying to prepare the exam 200-301 and i am trying to join the CCNA flashcards but i can not join I have tried all kind of different payments method so what shall i do? thank you

[@JeremysITLab]

@@BeyondTheCosmos17 The flashcards are free. Follow the link in the top line of the description

[@kalpasankara3711]

Hi jeremy, i have a clarification for question 2 in the quiz. For the Ip 10.0.13.1/26 the subnet mask is 255.255.255.192 . So the wildcard value indicated in the network command should be 0.0.0.63. Can you please clarify how the value for wildcard is 0.0.1.255? Thanks

[@JeremysITLab]

Hi, to answer this question you'll need to: 1: understand the purpose/function of the 'network' command 2: Write out the two interface IPs in binary 3: Write out the four network commands (IP/wildcard mask) in binary 4: See which command matches both IPs

[@kalpasankara3711]

Thank you very much. I was able to figure it .

[@NoelGwenhure-kb5dc]

@@kalpasankara3711 here is how i worked it out, i worked out the broadcast ids of A, C, D (B seems to have an invalid mask) , once you know where each network begins and ends it easy to figure out if our two addresses are included

[@NoelGwenhure-kb5dc]

hope to get a response on this🤔💆‍♂

[@ehsantehrani2813]

@@JeremysITLab Hi Jeremy, How can we obtain the ip/wildcard mask used in network command when we don't have the multiple choices and get the straight answer?

[@mr5np]

Thanks, you have unique way to teach when this course will be completed and we seek for another courses from you ❤️

[@JeremysITLab]

Thank you :)

[@sudhanshuvyas08]

Clean information, well explained ✌ thank you for your efforts :)

[@javidrashid5583]

quiz 2 question, for /28 the wildcard would be 0.0.0.15 and /26 would be 0.0.0.63, where did 0 0.0.1.255 come from ?

[@michaelrose4037]

Set the IP addresses in binary: 10.0.12.1/28 = 00001010.00000000.00001100.00000001 10.0.13.1/26 = 00001010.00000000.00001101.00000001 From here you can see the first 23 bits are the same so, the combined subnet mask is /23. The /23 mask is: 11111111.11111111.11111110.00000000 and to finally find the wildcard mask just invert 0s and 1s and you will get: 00000000.00000000.00000001.11111111 which is 0.0.1.255. If you activate them individually it would be 0.0.0.15 for /28 and /26 would be 0.0.0.63. But the question is to activate them with one command which is 0.0.1.255

[@brianlaqra3930]

@@michaelrose4037 Thanks.

[@imjinaah]

@@michaelrose4037thank you!

[@hinwong5366]

@@michaelrose4037 Thank you for also answering my question. Many Thanks

[@jayydon]

Question 1: Surely 'A' isn't true as Area 0 is only good practice but the backbone area DOESN'T HAVE to be area 0? Curious! Thanks for the videos Jeremy.

[@JeremysITLab]

RFC 3509: “ In OSPF domains the area topology is restricted so that there must be a backbone area (area 0) and all other areas must have either physical or virtual connections to the backbone. “

[@jayydon]

@@JeremysITLab I see, thanks for verifying this!

[@thomasleong3510]

Quiz 2 Solution G0/1 IP: 10.0.12.1/28 G0/2 IP: 10.0.13.1/26 Solution 1: Find the WildCard Mask Change the highest IP into .255, and the lowerest one to .0 Use 10.0.13.255 - 10.0.12.0 = 0.0.1.255 Wildcard Mask Which is 10.0.12.0 0.0.1.255 Solution 2: LOOK for the answer C is the answer = network 10.0.12.0 0.0.1.255 area 0 use 10.0.12.0 + 0.0.1.255 = 10.0.13.255 Which is 10.0.12.0 - 10.0.13.255

[@thomasleong3510]

Hi Jeremy , Hmm looks okie already not sure why haha

[@King17077]

Thanks for your support

[@JeremysITLab]

Thank you ;)

[@09alexandr]

Hi Jeremy! Appreciate you for your video, it's a great explanation as always. Could you advice, if router participates in few areas, should we configure different loopback interfaces for each areas? Or it's better manually configure RID on a router?

[@JeremysITLab]

No need to configure a different loopback in each area!

[@09alexandr]

@@JeremysITLab so it's ok to use one RID for each areas, right?

[@brettpointer7060]

@ 20:55 in the video, you create 2 separate 'network' statements for the 10.0.x.0 networks. Why did you do this? Wouldn't 'network 10.0.0.0 0.0.255.255 area 0' suffice? Creating a 10.0.0.0/16 network statement should include both networks, right?

[@voiceofreason314]

Thank you, sir. Very thorough, as usual. Just a quick reminder, if possible: Why is it important to study EIGRP terms (referring to the day 25 extra Anki flashcards) if it's not gonna be on the test. I know you explained it somewhere but I can't recall where to look. Also, I think both Day 25's flashcard folders are labeled 26...I think.

[@JeremysITLab]

It's not on the exam topics list, but that doesn't mean it's not on the exam. The flashcard labels look fine to me, both labeled 25.

[@voiceofreason314]

@@JeremysITLab Thanks for that explanation. In regards to the flashcards, the file names are accurate. It's just when they're imported into Anki, the folders are misnamed (day 24 and 25 if I remember correctly).

[@konradwerner4134]

18:03 what would be a real life example ? and what configuration on router physical cables connected or cli ?

[@HashemRodef]

You said that ExSIM you used for your CCNA and CCNP studies? which SIM package specifically did you use to study for both?

[@parvinahmadov2115]

Hello mister Jeremy i have one question On a broadcast network 10 routers are interconnected using ospf. How many adjencies will be established between Them? A 45 B 17 C 28 D 16 How to count please type

[@kakhakaxa4807]

I'd like to clarify one thing I heard in another author's videos: Is it right : In area max 50 routers, Router to be max in 3 areas; Single Router to have max 60 neighbors? IF isn't right which number are correct in THIS case ??? Thank you! I believe in your answer :)

[@JeremysITLab]

I'm not sure, I haven't heard those numbers before. I think the maximum the router can handle depends on the model of router.

[@annakratochvilova8537]

Hey Jeremy, you mentioned that the OSPF areas cannot be devided up and that all areas must have at least one ABR connected to the backbone area. What about the virtual link? It allows us to either split an area or have an area that is not *directly* connected to the Area 0. Did you not mention it because it's not part of the CCNA?

[@ForkKingGovi]

Thanks for the videos, they've been really helpful. Roughly how many more videos do you think there will be? I'm trying to make a plan on how long it will take before I can look into booking the exam.

[@JeremysITLab]

I think the course is about 50-60% complete at the moment.

[@maboooom8106]

Really appreciate the videos and i'm almost all caught up. I know that this series is only about 50-60% complete but which topics do you have left to cover? I'll need to continue on my own and wondering what topics I should study.

[@JeremysITLab]

Check the official exam topics list: learningnetwork.cisco.com/s/ccna-exam-topics

[@edwardcasas2137]

Excellent content, I'm grateful for the channel.

[@Aaron-sy5yx]

Great video as always. I do have a question please. If we don't use Area 0 as the backbone area, how will the router know which is the backbone area? Or it the backbone area a factor of the physical topology rather than the area number?

[@JeremysITLab]

The router won't know which is the backbone area, and OSPF won't function properly (the areas won't exchange routes, if I remember correctly).

[@MAbdilahi]

Thanks Jeremy for your great work as always

[@JeremysITLab]

Thanks :)

[@muhammadzaki6135]

On 31:56 . The second quiz question. Can someone please explain in detail how specifying that range activates both the interfaces

[@TheCommanderKIA]

10.0.8.0 0.0.3.255 matches IP addresses 10.0.8.0 to 10.0.11.255, so it doesn't match either of the interface IP's.

[@KV-qv7oh]

can someone explain quiz 2's answer? How does that IP match the range when in the example config during the lecture we configured 10.0.12.0 & 10.0.13.0 separately ?

[@NoelGwenhure-kb5dc]

work out the broadcast ids of each network in the multiple choice, once you have address ranges you can easily determine which option accomodates both ip addresses... keep in mind in the video we used more specific prefix lengths, this is to configure a variety of subnets in one command

[@kwagalgave]

Hi Jeremy's IT Lab, Hope your doing Great, when should i expect VPN and NAT lecture video, Thanks

[@JeremysITLab]

Not sure when each topic will be released!

[@kwagalgave]

@@JeremysITLab Thanks for your response

[@thedemiloving]

I dont get why Quiz 2 is C wouldnt the wild card mask have to be 0.0.0.63? 255-192? @Jeremy's IT Lab

[@Hartley94]

🙏 So helpful am back From KE

[@JeremysITLab]

Thank you :)

[@kenomar]

Thanks for the content, have learned a lot

[@joeyisho5370]

Can anyone please give a detailed explanation for the answer of Quiz 2? I just don't understand how were getting the answer. Thank you.

[@munibali1394]

Sir, What is a backbone area? Does backbone area mean public internet or Regional ISP provider?

[@Rare_X24]

Can someone explain to me why the answer on quiz 2 is c? I'm kind of confused. Also thank you Jeremy for your awesome course, it's helping a lot!

[@spacemunkee1]

I love your material. Makes it very easy to understand and very interesting. Looking at purchasing your course. Do you have an app for android?

[@mundoin5583]

Great video Jeremy. Thank you for your content it helped a lot. Good luck my freund.

[@JeremysITLab]

Thank you, I'm glad it helped :)

[@unrealriot]

Hi Jeremy, regarding the Boson Ex-Sim Question, could you explain what does it mean for OSPF to "redistribute" the routes? Does this have to do with a router sharing different dynamic protocols (mixed EIGRP and OSPF), in other words, Router redistribution?

[@JeremysITLab]

Yes, 'redistribution' involves sharing routes from outside of the routing protocol into it (like static, connected, or EIGRP routes into OSPF)

[@unrealriot]

@@JeremysITLab got it. Thanks

[@neverhomepnw]

32:16 Regarding Question #2. Can someone explain why wildcard subnet is 0.0.1.255 every time I calculate it I get a different subnet. Thanks!