Free CCNA | RIP & EIGRP | Day 25 | CCNA 200-301 Complete Course

[@JeremysITLab]

ERRATA: At 17:30, I said '...which is currently the default of 20'. It should be '120', as is shown on the screen. Typo in my script 😅 At 24:48, '128' is written in binary as '100000'. It should be '10000000'.

[@hokopl]

I think it`s not fair from Cisco. If someone is preparing to pass the exam, buying materials, spending so much personal time to learn and paying for the exam itself Cisco should provide list of exam topics 100% accurate to what to expect on the exam day. On the list it is OSPF and nothing else and You can get RIP or any other routing protocol questions. It`s like learning for CCNA but You should read as well CCNP and CCIE materials to be prepared. I don`t get it

[@3232groundhog]

Hi Jeremy, not sure if you noticed or if you can change it now but around the24:48 mark, 128 is shown in binary as 100000 instead of 10000000. Not a major issue and should be clear to most but some folks may find it confusing, especially beginners who are not so familiar with binary. Great content as always! 👍

[@JeremysITLab]

@@3232groundhog Thanks for pointing that out, I'll add it to the errata. Although at this point in the course I'd expect everyone to be familiar with binary!

[@animeshsingh4016]

@@JeremysITLab any targeted date to completely upload all the ccna videos because I am done with all 26 lecture videos .

[@larryh3979]

@@hokopl The clue's in the name 'Cisco Certified Network Administrator'. The expectation is that you will be able to administer Cisco networks not that you know OSPF alone. So I think it's fair for them to expect candidates to at least have a clue what other common protocols (etc) are out there if not in any depth.

[@fereydoonsassani377]

Dear Jeremy, I have passed the CCNA exam. Thanks so much for your incredible training and this journey of learning through all of your videos. (Posting here since I love routing most of all) So grateful...

[@JeremysITLab]

Awesome, congrats on the pass! Well done :)

[@rafisiddiq6168]

What is wrong with the few individuals who disliked this incredible video? Thank you, Jeremy, for the wonderful work.

[@JeremysITLab]

Thanks Rafi :)

[@kristenalakkawi2218]

it wasnt necessary, why doesnt he just show us ccie work, stick with the script

[@c7po457]

​@@kristenalakkawi2218 What do you mean by 'stick to the script'? Why should he jump to CCIE? Genuine question. Not trying to argue.

[@pyu6801]

​@@kristenalakkawi2218 some people might overload with information if he just show it, and he's focusing on CCNA is thats unnecessary in the first place

[@parker73724]

@@c7po457 I'm late but Jeremy goes way past what is necessary to pass your CCNA. He has many videos on topics that aren't part of the exam topics list. The commenter wasn't saying that Jeremy should jump to CCIE, he was saying this is a CCIE level topic that he's teaching as a part of a CCNA course and it's frustrating. This is one of those videos. I personally appreciate them because having a fundamental understanding of everything makes it easier to understand the things that are a part of the exam topics list.

[@imjinaah]

0:01 Introduction 1:33 Things we'll cover 2:16 RIP 4:09 RIPv1 and RIPv2 7:13 Basic RIP Configuration 9:49 Network Command 13:51 Advertise a default route into RIP 15:45 Show IP protocols 18:01 EIGRP 20:30 Configuration 23:00 Wildcard Masks 30:01 Show IP Protocols 33:12 EIGRP in Routing Table 33:48 Things we covered 34:47 QUIZ!

[@JeremysITLab]

Mind if I update my videos with your timestamps? ;)

[@imjinaah]

@@JeremysITLab yes, that would be cool! 😆 btw I love the new thumbnail! 😄

[@JeremysITLab]

@@imjinaah Thanks, I’ll get on that tomorrow :) And glad you like the new thumbnails!

[@charleskim36]

About the Quiz 2, how did you get the EIGRP network command 128.0.0.0?

[@seanturner7511]

I am also wanting to understand this

[@bryanclutario6251]

Same here did not get it that part really. Searching now for different resource so that I can get back here already to continue my study hehe 😅

[@TheReal_FishFins]

The OPTIMAL wildcard is a /13 prefix which is 0.7.255.255. However, the question has three answers that have an exact match of 172 with the first octet of zero. the problem with these is that the second octet for all three of these does not have the range required of Class B network range of 20-26 (hence requiring a /13 prefix) to advertise BOTH networks. The first option of A is a massive network range prefix of /1 where there can be over 2 billion usable hosts. This is why it's the only answer that is correct. It's just extremely inefficient for a real network.

[@Talj_wow]

I think he added the full class B range 128-191 which includes 172.xx

[@DarkAgent80]

Anyone find a good resource to explain this answer. I still do not undertand how we got 128.0.0.0. Thanks!

[@dbest19330]

Even after completing a very good CCNA video training on Udemy, while watching this series of videos, I still find myself learning new things and my overall level of understanding increases. Thank you Jeremy!

[@JeremysITLab]

Thanks David, glad to help!

[@Clovistered]

Same here, wouldn't be surprised if Jeremy launches a CCNP course soon

[@chrisfoster3772]

@@Clovistered so are you surprised?

[@Clovistered]

@@chrisfoster3772 it’s awesome finally

[@khudadadhussaini9695]

Can you tell me which one on Udemy, please?

[@MrArnipress]

I like how you include other things into complete CCNA course even though there are not specified in exam topic list. RIP and EIGRP tend to appear on job interviews and for obvious reason it’s good to know the answers.

[@101trm]

I think this video was the most confusing, especially the wildcard masks. where a lot of the details were said instead of on screen as usual. Repeated it a couple of times and still confused on how to determine how many binary digits have to match. For instance, at 27:11, why does 172.16.1.0 have to match all /29 network bits. While at 28:15 only the first 5 bits?

[@erikcarlin9538]

🎯 Key Takeaways for quick navigation: 00:27 *📚 Understanding the importance of covering RIP and EIGRP in the CCNA course* - RIP and EIGRP may not be explicitly listed in the exam topics, but they might still appear in the exam questions. - Familiarity with RIP and EIGRP provides a foundation for understanding dynamic routing protocols, which can be beneficial for OSPF, explicitly listed in the exam topics. - Although not studied to the same depth as OSPF, gaining an overview of RIP and EIGRP is advantageous for a broader understanding of networking concepts. 02:17 *🔍 Exploring the basics of RIP* - RIP (Routing Information Protocol) is an industry standard distance vector interior gateway protocol. - RIP operates based on hop count as its metric, with a maximum hop count of 15. - RIP versions include RIP version 1, RIP version 2, and RIPng for IPv6. 06:15 *🛠️ Configuring RIP version 2* - RIP version 2 supports VLSM and CIDR, unlike version 1. - Configuration commands for RIP version 2 include specifying the version, disabling auto-summary, and defining network ranges. - Understanding how to configure RIP version 2 provides a foundational understanding of dynamic routing configuration. 13:01 *📡 Utilizing RIP for default route distribution* - RIP can be used to distribute default routes to routers, enabling access to external networks. - The DEFAULT-INFORMATION ORIGINATE command shares the default route information with neighboring routers. - Routers can load-balance traffic over multiple routes with the same metric, providing redundancy and optimized network traffic flow. 15:43 *📊 Reviewing RIP with SHOW IP PROTOCOLS command* - The SHOW IP PROTOCOLS command provides insights into RIP configuration, including timers, network listings, and neighbors. - Parameters like maximum paths and administrative distance can be adjusted using specific commands in RIP configuration mode. - Understanding how to analyze RIP configurations prepares for troubleshooting and optimizing network performance. 18:06 *🔄 Introduction to EIGRP as an advanced routing protocol* - EIGRP (Enhanced Interior Gateway Routing Protocol) is an enhanced version of IGRP and is considered a Cisco proprietary protocol. - EIGRP offers faster reaction to network changes compared to RIP and supports very large networks without the 15-hop limit. - Unique features of EIGRP include multicast messaging, unequal-cost load balancing, and improved efficiency, although its usage is primarily limited to Cisco devices. 20:56 *🛠️ Configuring EIGRP on R1* - Configuring Autonomous System (AS) numbers for EIGRP routers. - Disabling auto-summary to advertise specific network prefixes. - Using the NETWORK command to activate EIGRP on interfaces. 22:14 *🧮 Understanding Wildcard Masks* - Explanation of wildcard masks as inverted subnet masks. - Examples of converting subnet masks to wildcard masks. - Demonstrating wildcard mask usage in EIGRP network activation. 26:26 *🌐 EIGRP Network Activation and Wildcard Masks* - Understanding wildcard mask matching for activating EIGRP on interfaces. - Examples of EIGRP network activation based on wildcard mask matching. - Importance of matching bits in wildcard masks for EIGRP activation. 30:06 *📊 EIGRP Protocol Details* - Overview of EIGRP routing protocol configuration and operation. - Explanation of EIGRP metric calculation using bandwidth and delay. - Understanding EIGRP router-ID determination and its significance. 33:13 *🗺️ EIGRP Route Table and Metrics* - Analyzing EIGRP routes in the routing table. - Comparing EIGRP metric costs with other routing protocols. - Recognizing the complexity of EIGRP metrics in larger networks. 34:10 *📚 Review and Quiz Questions* - Recap of RIP and EIGRP configuration basics. - Preparation for learning OSPF in upcoming videos. - Practice quiz questions for reinforcing understanding. Made with HARPA AI, how

[@starky56]

I am so relieved that you explained wildcard masks! 😀

[@lionelhunt3610]

Jeremy, your time and effort in putting these videos together is greatly appreciated. I have such a greater understanding of Cisco thanks to you.

[@JeremysITLab]

Thanks Lionel, glad to help!

[@ananyamanna7150]

You are a gem Man ,I already completed all the videos in this CCNA series.

[@Princepapii]

good luck on your exam!

[@abdelrahmanelsherbiny8833]

I am preparing for my CCNP ENCOR exam and I am still getting back to your videos to better understand these topics. I have watched videos from several reputable resources and I still think you are THE BEST instructor!

[@JeremysITLab]

Thank you! And good luck with the ENCOR exam :)

[@abdelrahmanelsherbiny8833]

@@JeremysITLab Thanks Jeremy :)

[@egorm8952]

@@abdelrahmanelsherbiny8833 Same here)) How did it go with ENCOR btw?

[@egorm8952]

Jeremy, your materials are great and highly appreciated by our study group for CCNA/CCNP. Thank you.

[@maxwellchessdotcom6952]

Hello, I'd like to welcome you to Jeremy's IT lab.

[@chrisfoster3772]

Thanks mike

[@anubhutisharma9632]

no place for any doubts ..every concept is so crystal clear..thnk u sir

[@glenntembo2693]

J'sIT-Lab. Thanks man. I like this guy. There is always something catchy always, never leaving any table unturned

[@JeremysITLab]

Thanks as always, Glenn ;)

[@punitdubey3849]

👌Thanks Jeremy. Great video and well paced. The best I have seen so far. 👍

[@franciscolucasmeleco2927]

First I´d like to congratulate you for this wonderful work you are doing, it is amazing. I designed a similar topology in packet tracer and tried to use RIP and a remote server to allocate Ip´s to the PC´s, the routing table was populated and the routers could ping each other, what happened is that the pcs couldn´t get IP´s and even if I manually configured manually the pings didn´t succeed. But with EIGRP the pc´s could get IP´s and ping each other.

[@vauxhallchevette5858]

You know it's sunday when you see a notification from Jeremy it lab. Thanks for the video.

[@JeremysITLab]

Same day, same time, every week ;) Thanks for watching!

[@Alberto.81]

Thank you Jeremy, you're really great teacher, I am able to understand tough topic cause of you.

[@JeremysITLab]

Thanks Alberto, glad to hear that 👍

[@valenben]

I think you are the best instructor. Even though English is my third language, I don't have any problems understanding your explanations. Thank you, Jeremy!

[@guy7345]

Your content is brilliant Jeremy. Not all heroes wear capes

[@JeremysITLab]

Thanks Guy!

[@khuu123]

thnak you so much jermey bec of you I can under stand topics of CCNA

[@Intigrity568]

Hi Jeremy, I got confused in Quiz 2 36:58 here, where's both IP addresses are in Class B, I didn't understand how the network command become 128.0.0.0?

[@tg9460]

Thanks Jeremy. Great video and well paced. The best I have seen so far. Highly recommended.

[@JeremysITLab]

Thank you! :)

[@travelandexplorebd8962]

Jeremy sensei you have got hyper-level of patience to make all these videos. thanks once again.

[@thatcardude134]

jeremy the best. Gold Standard !!! training

[@kimpaulson5542]

your slides/material and course in general are very easy to follow along to. Thank you!

[@synapticweb]

Not even my teacher is this good. Thanks so much

[@JeremysITLab]

Thank you Billy :)

[@-b777ljq3]

what a good lecture!! the quiz is very good and important to understand the concepts clearer, many thanks to Jeremy.

[@0wad]

Just bought your JCMP level membership to support!

[@JeremysITLab]

Thanks for your support! I really appreciate it :)

[@zamilazhari6228]

Hi Jeremy, thank you for your effort. I will be seating the CCNA exam in a few weeks. I hope i can pass the exam. I hv tried the demo Boson Exsim. Its really useful but to subscribe the full version, it's quite pricey for me and gutted that i can't afford it.

[@alexwisch6192]

For anyone having trouble with the wildcard masks, an easy way to figure it out is by adding both IP's after the network command together. If each IP is lower than the added total, it will cover it and activate EIGRP or OSPF. For example: network 128.0.0.0 127.255.255.255 - added together, those are 255.255.255.255. This command would actually cover any IP address. However, if you executed the command network 172.16.0.0 0.0.255.255, adding those together you'd get 172.16.255.255 and this would not cover an IP like 172.20.20.17 or 172.26.20.12 (both of which are higher) - If I'm wrong, please let me know though!

[@ImBingable]

I was very confused with quiz question 2 and this was the perfect explanation thank you so much!!

[@Manu-rd4pc]

Thank you!

[@Manu-rd4pc]

@@ImBingable Same, i was very confused

[@ochiau3539]

woahh my mind is much clearer now thanks to this shortcut!

[@juliajedek]

Having hard time to process everything, but still continuing....thank you so much

[@kesicidelici61-bp5oj]

Great delivery of what wildcard mask is. I tried to learn from another famous lecturer but he could not make it good like you!

[@fumeshroomz]

Hi jeremy, ive been looking for the reason why my eigrp wasnt working for ages and youve just fixed it all for me in mere seconds, thanks i love you!

[@shw256]

Excellent explanations. Sets the groundwork for upcoming in-depth discussion of OSPF.

[@jamestillman5247]

I'm still having a terrible time understanding EIGRP terminology its overly confusing despite Jeremys best effort to explain it. I feel like the terminology was purposely designed to be confusing.

[@johndro9]

What part are you struggling on?

[@scientiest12]

@@johndro9 the feasible distance reported distance successor feasible successor bs

[@onewaydrive_]

thanks as always my bro! i dont look forward to much these days, but i always look forward to my studies. Im so afraid im going to hit the end of your course before youre done and ill have to use other videos :( i do have the official CERT guide I try to follow along with, but i love these videos!

[@JeremysITLab]

Thanks Bobby, glad you like the course! I wish I could put the videos out faster.

[@Brian-nz6ns]

@15:36 I'm a little confused about the "default-information originate" command. Is this necessary? The default route is always in the routing table, so why wouldn't it naturally be advertised to the other routers?

[@JeremysITLab]

Routers don't normally advertise static routes to their RIP neighbors.

[@brettpointer7060]

After your explanation of wildcard masks @ 29:08 in the video, did the network statement for the 172.16.1.0 network required to have a wildcard mask? If you had a network statement of 'network 172.16.1.0' wouldn't it default to a /16 network which would then include the ip address on the g2/0 interface on R1?

[@SJSharkByte]

So I get how wildcard masks work and you explained it well. But what is the PURPOSE of the inversion? WHY is the subnet mask converted? It just seems so unnecessary but maybe I'm missing or misunderstanding the crux of it

[@willierants5880]

Although not core fundamentals anymore this is an extremely good lesson on the operation of Routing Protocols.

[@JeremysITLab]

Thank you :)

[@mikeoliveras7159]

I appreciate your videos as they make understanding easy for me.

[@HubertoMadalena-rz4xs]

another important concept for RIP is split horizon, where routes learn through a RIP router are prevented from being sent back to its neighbours

[@senpaiwaifu9885]

Here is a useful information on EIGRP AS ( autonomous system ) number. The AS number is a 16-bit value, allowing it to range from < 1 - 65,535 >. The AS number 0 is used to represent the '' default autonomous system '' or '' AS-wide scope''. AS number 0, therefore must not be used, because its a reserved number. When a router is configured with the AS ( autonomous system ) number 0, it indicates that the router is participating in multiple EIGRP "AS" number or domains without having a dedicated "AS" number for itself. This setup allows the router to act as a central point for information exchange between different EIGRP domains.

[@ariortiz000]

Thanks a bunch Jeremy. Hope all is well!

[@JeremysITLab]

Thank you Ari, I'm well :) I hope you are too!

[@meddet8336]

Thanks a lot Jeremy. I'd like to ask you about no auto-summary role I didn't grasp it well.

[@JeremysITLab]

Auto-summary automatically converts the advertised routes to 'classful' addresses. For example, if trying to advertise a route to destination '192.168.1.16/28', auto-summary will change it to 192.168.1.0/24 (a regular class C network).

[@dch2510]

Hey. There is a simple trick for Wildcard Mask : Each decimal value (byte) of the result of (eigrp network + wildcard mask) Must be >= greatest corresponding decimal value of any interface IP address set in router AND

[@salomonmetre2117]

Thank you so much for this series of videos😊. I think two 0s are missing in the first subnet mask (see 24:47)

[@JeremysITLab]

Yep, I've got that one in the Errata in the comments ;)

[@tobiaskamper1569]

I was following along no problem, right up until the network command with the wildcard masks, it seems unnecessary to just invert the mask all of a sudden lol. I hope I'll learn there's a good reason for it some day!

[@JeremysITLab]

I think it's just to distinguish wildcard masks (which identify which bits need to be matched in the 'network' command as well as other things like ACLs) from subnet masks (which identify a network range). You'll get used to them!

[@muhannadak8087]

Thanks a lot Jeremy. You are the best!!

[@JeremysITLab]

Thank you ;)

[@ernestibrahim7532]

Thanks so much for this wonderful job, I can't thank you enough when saw the content of the flash cards that you prepared and give it out for FREE. Stay Blessed 💗

[@JeremysITLab]

Thanks Ernest :)

[@muhammeddilshad6042]

Sir, at 15:30 gateway last resort is set to 10.0.34.1....if both 10.0.34.1 & 10.0.24.1 is treated equally in RIP...why is 10.0.34.1 choose over 10.0.24.1 ???

[@leviackerman3935]

Exactly, I thought the same

[@saltech2024]

Gradually moving Day 25 is a good adventure

[@mohameddoubad1653]

Thanks Jeremy !

[@JeremysITLab]

Thanks for watching ;)

[@nelajw5159]

Hey Jeremy, I really appreciate your course and all, but is there a way for you to update it... Because many things in the BosonExam is not part of your course anymore... For example the whole principle of successors and the EIGRP routing table...

[@starlingamezquita5919]

Hi Jeremy, Can you please help me clarify something? 27:20 - if instead of changing the IP address in the network command you change the wild card mask to 0.0.0.15, that will also activate EIGRP? Thanks for your help :)

[@uncommonknowledge9471]

37:28 Wouldn’t a wildcard mask of 63.255.255.255 also suffice?

[@monetka79]

Thank you so much, Jeremy!

[@JeremysITLab]

My pleasure, thanks for watching :)

[@shinobub3260]

@13:49 Can you also use shutdown command on G2/0 instead of passive -interface command?

[@shinobub3260]

@@pureconex Thanks! :)

[@saltech2024]

I hardly conclude on sth but this is the best KZbin series for CCNA 200 - 301

[@JeremysITLab]

Thank you Ibrahim :)

[@trunks10k]

Thanks for the videos! I thnk you might have to update these. Multicast seems to be part of the CCNA as it is in some of the exam dumps I've seen

[@JeremysITLab]

Multicast is not part of the CCNA exam topics.

[@trunks10k]

@@JeremysITLab I hope you are right. Our prof. Has been giving us practice quiz dumps with a bunch of muticast/unicast and sometimes anycast questions and answers on them

[@bobdavislumbro4047]

Hey Jeremy, @37:03 what type of prefix is wild card ? 01111111 11111111 11111111 11111111 that would convert to binary: 128.0.0.0 is that prefix /1 ? Please explain

[@Saksham0412]

Awesome!! really love it :)

[@smharoonrasheed1890]

Please enable multi-language Audio options on all your KZbin videos. This would greatly help people around the world to understand and learn from your content." Thank you so much

[@sankofacloudworks]

Thanks for these videos Jeremy. How do we know how many bits are supposed to match in the examples @28:48?

[@JeremysITLab]

As long as the correct bits match between the 'network' statement and the IP address on the interface (as determined by the '0' bits in the wildcard mask), EIGRP will be activated on the interface. A common way is to just configure the network address and the inverse of the subnet mask. ie. if the interface IP is 192.168.1.1/24, do 'network 192.168.1.0 0.0.0.255'. Another option is to configure the exact IP of the interface with a /32 wildcard: 'network 192.168.1.1 0.0.0.0' But the options are practically limitless, for the same interface with the '192.168.1.1' IP, below are some random examples of network commands that would activate EIGRP on the interface: network 192.0.0.0 0.255.255.255 (0.255.255.255 means the first 8 bits have to match) network 192.168.0.0 0.0.255.255 (0.0.255.255 means the first 16 bits have to match) network 128.0.0.0 128.255.255.255 (128.255.255.255 means only the first bit has to match) network 192.128.0.0 0.7.255.255 (0.7.255.255 means the first 13 bits have to match) network 0.0.0.0 255.255.255.255 (255.255.255.255 means no bits have to match, EIGRP will be activated on all interfaces regardless of the configured IP address)

[@sankofacloudworks]

@@JeremysITLab thx Jeremy..u da man!

[@sauravsrivastava3341]

Just Awesome and God bless you Sir

[@JeremysITLab]

Thank you Saurav :)

[@이동욱-k1g9l]

The no auto-summary command prevents automatic network designation. Is the command entered to use VLSM and CIDR correct?

[@JeremysITLab]

You're correct, the command is necessary to use VLSM and CIDR! But in modern devices, EIGRP 'no auto-summary' is enabled by default.

[@이동욱-k1g9l]

​@@JeremysITLab Thank you for answer !! :)

[@wiktorbator9974]

Hello and thank You for an amazing and valuable content. What is AS (AF?) You mentioned at 30:52? Advanced Services? do i missed something?

[@randomlabs1784]

you can also do this to "calculate de wildcard mask". if the octet is 1110 0000 just count de number of zeros and use as exponent .. and do 2 ^ n - 1 . so 2 ^ 5 - 1 = 31. if we do the same for: 255.255.252.0 or /22 1111 1111 . 1111 1111. 1111 1100. 0000 0000 [2 ^ 0 - 1] . [ 2 ^ 0 - 1] . [2 ^ 2 - 1] . [ 2 ^ 8 - 1 ] 0 . 0 . 3 . 255

[@gerryvalenzuela9158]

Jeremy do you have a Q and A section for your course ?

[@JeremysITLab]

Feel free to ask comments in the comment section

[@malluk4127]

Jeremy, Do you have discount code for the Boson Exams?

[@JeremysITLab]

Nope! Their summer sale just ended, I'm not sure when the next sale will be.

[@srinivasanv4643]

Hi Jeremy, at 22:22, instead of the IP with the wildcard, the command could also be entered as network 172.16.0.0 as well right? That would still activate EIGRP on G2/0 of R1, right?

[@JeremysITLab]

Yep, that would work too.

[@srinivasanv4643]

@@JeremysITLab Thanks 😁

[@microsoftsarker]

ধন্যবাদ স্যার,অনেক সহজ হলো

[@ActionzvanNeshie11]

Fantastic, this is superb. Keep on the good work @Jeremy

[@JeremysITLab]

Thank you :)

[@huberthperez9655]

Hello Jeremy , on this video at 26:12 ... regarding the bit that must match ... is super confusing ... i dont Understand what you are trying to explain ... I think am missing something on the wildcard mask ..... topic Why the 1st , 28 bits must match on this example but on the quiz only the 1st bit must match???

[@JeremysITLab]

In the example at 26:12 the first 28 bits must match because a /28 mask was used. In quiz 2, the first bit must match because a /1 mask was used.

[@abdelwahabamoura2645]

Great explanation..thank you a lot 💓 🙏 💛 Jeremy

[@joelc1831]

Thanks for your great work J. Please I can’t get the lab and flash card for this video. The last flashcard and lab i downloaded ended on day 24

[@JeremysITLab]

I update the Google drive every week, follow the same link

[@danycock8493]

quiz 2 got me confused how if I use 0.15.255.255. way I do it is I take the block size so 172.20.20.17 & 172.26.20.12. so second octet if take block size of 16 to fit both 20&26 in one block so thats subnet of 255.240.0.0 .wild card mask=255.255.255.255-255.240.0.0 = 0.15.255.255.

[@JeremysITLab]

That would work too, but it's not one of the options!

[@bright6627]

Hi Jeremy, I love your video so much,and I plan to follow your video course to pass CCNA in less three months. I have studed 11 lessions and may I ask how many lessions in total there are and when you will upload all the video? Thank you very much.

[@JeremysITLab]

You can see how many lessons there will be here: kzbin.info/aero/PLxbwE86jKRgMpuZuLBivzlM8s2Dk5lXBQ As for how many there will be, I'm not sure. Maybe about 50 'days' in total.

[@MrBoemul13]

Just a short question regarding minute 7 of this video. You say there that 10.1.1.0/24 will become class A address so assumed to be /8. (10.0.0.0). Based on the logic of the following ones for RIPv1 should not this be assumed as /24 as it is ? so should not it remain a /24 ? Sorry if it's a stupid question!

[@JeremysITLab]

No, /24 is for class C addresses. 10.1.1.0 is class A.

[@funny_kidstv7662]

Is Eigrp in the New ccna 200 301?

[@JeremysITLab]

It's not listed in the exam topics, but you should know the basics outlined in this video.

[@TrustySteeringWheelTray]

I know how to do wild card masks (it's just an inverted subnet mask) however your quiz question 2 here completely stumps me. Where does the 128.0.0.0 come from? Wouldn't the subnet mask be 255.240.0.0 and wildcard -> 0.15.255.255? They match the same up until the 12th bit. I'm so confused how you arrive at 128.0.0.0 and only use the 1st bit.

[@codygosney976]

I'm a bit lost on this one too. I wish he'd gone into detail a little more.

[@yosoytacoseasoning]

He’s illustrating the point that you can use the wildcard to search a wider range of values, instead of just inverting the subnet. Using the example he did, the router would match interfaces from 128.0.0.0 to 255.255.255.255, instead of 172.16.0.0 to 172.31.255.255 with the /12 subnet you implied.

[@barrysewell4160]

When you configure a network, do you do a separate input for each interface's network or try to find one that works for all the interfaces? Thanks

[@GPutraJayawardana]

thank you for the updates sir :)

[@JeremysITLab]

Thanks for watching ;)

[@dharmikpatel1116]

What is the use of wildcard mask? It functions exactly similar to network mask(normal mask).

[@Chessari017]

Q2 in the quiz has left me confused. Even with binary written, still trying to understand the logic of how 128.0.0.0 is a match for 172.x.x.x. Are we not given the subnet mask on the exam for questions like this?

[@JeremysITLab]

The subnet mask configured on the interfaces is irrelevant for activating ERIGP on them, so it doesn't matter. 128.0.0.0 127.255.255.255 matches both of those addresses because the wildcard mask 127.255.255.255 means only the first bit of the IP address has to match (it's the only bit that is a 0 in the wildcard mask). The first bit of 128.0.0.0 is a 1. 172.20.20.17 and 172.26.20.12 also have a first bit of 1, so they match the statement 'network 128.0.0.0 127.255.255.255'.

[@Chessari017]

​@@JeremysITLab Brilliant! Finally understood. Thanks Jeremy!

[@wafa1203]

@@JeremysITLab so we cannot just take the subnet mask and convert it to wild card mask as you did with 172 network with slash 28 and that wild card mask was 0.0.0.15 so why we didn’t the same here?

[@JeremysITLab]

@@wafa1203 You can do that if you want, feel free. Although notice that the question doesn't state the subnet mask configured on either of the interfaces, and also none of the answers use a 0.0.0.15 wildcard mask. In quiz questions like this, pick the correct answer from the available options, even if there are other possibilities that maybe correct. When using the 'network' command, there will always be lots of possibilities that will work to activate EIGRP on the interface.

[@pedrohartman5973]

@@JeremysITLab Got it! Thank you!

[@unrealriot]

Hi Jeremy, on 15:20, how does the router R4 determine which gateway of last resort is going to be? Why not be 10.0.24.1?

[@JeremysITLab]

Both are used as the gateway of last resort, R4 will load balance over the two routes.

[@johanna-bapt.martaasaeda9499]

Hello ! I've watched from Day 1 to 25. Now, these topics are not very urgent for my current needs for networking (I don't have multiple paths!), I'm thinking of picking up from Day 30 (and watch the skipped videos later when I have more time) Are the topics in-between needed for understanding Day 30 and on ?

[@strikermax]

Great video, Thanks!!!

[@JeremysITLab]

Thanks :)

[@busby10]

Thanks for the great video. Can you explain why a wildcard is used instead of a subnet mask? What is the difference between the two besides the bits being flipped? It seems like 0.0.0.255 is just another way of writing 255.255.255.0, so I assume there is something a wildcard does differently.

[@JeremysITLab]

I don't know any specific reason why they chose to use wildcard masks instead of subnet masks to match addresses in the 'network' command. But one advantage of wildcard masks over subnet masks is that subnet masks have to be a contiguous set of 1s followed by a contiguous set of 0s (for example 11111111.11111111.00000000.000000). Wildcard masks can be discontiguous, for example 00000000.11111111.00000000.11111111, meaning that only the first and third octets need to match. This allows for a kind of flexibility not available with subnet masks. Although I'm not sure if Cisco even allows discontiguous wildcard masks for the 'network' command.

[@Leafycoke]

@@JeremysITLab I wonder if since the bits in the ip address and the network address in the network command must match, the firmware does a bitwise comparison between the two by matching the number of bits in each address up to the number of 0's in the wildcard mask. If you input the subnet mask then the firmware needs to invert each bit and that's just another low level operation the router needs to do so it saves time by making the user input the wildcard mask.

[@Laevatei1nn]

my teacher ever told me that wildcard mask isnt always the inverted version of subnet mask, is it true?if it is then what are the example?

[@JeremysITLab]

You should ask your teacher exactly what he meant, but one example is that wildcard masks don't have to a continuous group of 0s followed by a continuous group of 1s. You have, for example, used a wildcard mask like 0.255.0.255. Subnet masks, on the other hand, can't be like that. They are a row of 1s, followed by a row of 0s, like 255.255.0.0.

[@harveyalfaro2925]

Hi Jeremy, I have a question here, on your Eigrp lab example, why you put 'no auto summary' command, even it is a classless protocol?

[@ItsJeffNotGeoff726]

Do you know if there will be another Boson Exsim and Netsim sale through your link? I am looking for more ways to practice and apply this information. Also are you able to do a video talking about how you have used your CCNA experience? What information have you used the most from your CCNA and CCNP? Hope that's not too much, and as always I appreciate the videos.

[@JeremysITLab]

When Boson runs their next sale, I'll be sure to let everyone know ;) Currently I don't have a lot of time to make extra videos outside of the course content, but that's a good idea, I'll definitely make that video in the future :)

[@zkdcleric]

Hey man thank you for everything. how many more vidoes will you be making till you finish all the topics that are in the exam?

[@JeremysITLab]

I'm probably about 50% finished at the moment, so many more videos!

[@zkdcleric]

If i need to get the certification soon do you recommend niel's udemy course?

[@carlitos_fonts2665]

this video is the hardest,... so far. As a former CCNA, i don´t remember EIGRP was so confusing.,..,,

[@dashdigital5869]

so im having trouble understanding Quiz Question 2. is the answer A because it's the only one where the wildcard is the correct inverse of the EIGRP network command? also, is the IP address for that same EIGRP network command, the 128.0.0.0 address, just a random address made up to be used for this question or does that address specifically come from somewhere? thanks in advance!

[@JeremysITLab]

To answer that question you’ll need to: 1: know the purpose/operation of the ‘network’ command 2: write out the binary of the IP addresses and the network commands to see which network command matches both addresses.

[@dashdigital5869]

@@JeremysITLab ok, so i've spent a few hours this morning going over that question and i understand that if you write out, in binary, all the IP addresses listed in the EIGRP net. command and compare them with their respective wildcard mask, the only one that matches is option 'A'. i understand that part. im not quite sure if i understand where the 128.0.x.x address comes from tho. i went back and reviewed the video & looked at my notes. according to the video, "the network command will assume a classful address if no mask is specified". so since the interface IP add. are 172.20.x.x & 172.26.x.x, and no prefix is listed, these are considered class B addresses and since class b addresses start at 128 and end at 191, the EIGRP network command will use 128.x.x.x because the IP addresses on the interfaces will fall in that range? is that correct?

[@rotrose7531]

Thank you very much! These videos are gems