Wow, that's awesome! Best of luck in your career. I'm glad to hear my videos were helpful :)

Thank you Abdul :)

we all want to be experts we just have to keep learning and practicing 🙏

Thanks Alberto, cheers!

Thanks for your comment, I'm glad you like the videos :)

Thanks Samir :)

Thanks Nicholas :)

Thanks Anthony :)

You're in obsession bruh😮

@@Kafismoi passed bro🎉🎉are you preparing for it as well!

@@bhargavpatel4781 great bro💜congrats. Yeah Im preparing too but I have lack of consistency 😫

Thank you :)

Thanks Piotr :)

Thank you :)

Thanks Omar! And thanks for being a member :)

Thanks for the love ;)

I found this exact problem but a little different. It allowed 172.16.1.2 but denied 172.16.2.1. The problem was in the new lab files (redownloaded them 2 months ago). I have an older copy from a year and a half, which is working just fine.

Thanks Fethi :)

Thanks Miguel!

Thanks for watching :)

Looking only at the 3rd octet.... x.x.1.x...... When you convert the third octet to binary, you get 00000001. For a wildcard mask, 1 means that it can be a 0 or a 1 (i.e.wildcard). So with the mask alone, it means that the addresses that are possible are 10.10.0.x and 10.10.1.x achieved by flipping the last bit.....But also keep in mind that the original address is 10.10.2.x. , which in binary is 00000010. Which yields 4 possible combinations: 00000000, 00000001, 00000010, 00000011..... or if you prefer.... 10.10.0.x, 10.10.1.x, 10.10.2.x, and 10.10.3.x

Was going through the comments to see if it was just me who noticed. Same question!

It is to enable ospf on both the .1.0 and .2.0 networks at the same time

Makes perfect sense, thank you so much :) @@HemanthJabalpuri

@@HemanthJabalpuri would you be be able to elaborate please? I'm still a bit confused

@@dylannoronha5414the first step is to activate ospf, so he activated ospf on both the g0/0 and g0/1 interfaces of Router1 with the command “172.16.0.0 0.0.255.255” (because 172.16.0.0 with a 0.0.255.255 mask includes both 172.16.1.0/24 and 172.16.2.0/24 networks which are g0/0 n g0/1)…..(technically it actually includes everything between 172.16.0.0 to 172.16.255.255) hope i didnt make things more confusing.

Thank you :)

Thank you ;)

Thanks for watching :)

Yeah it's the same concept. 0 in the wildcard mask = the bit must match, 1 in the wildcard mask = the bit doesn't have to match.

Cheers, thanks for the comments ;)

Hi Jason! 😀

merry christmas Jeremy, wish you all the best

There's no need for the wildcard mask to match the subnet mask configured on the interface. As long as the proper bits in the configured IP address match the configured OSPF network command, OSPF will be activated on the interface.

@@JeremysITLab Perfect thank you for clearing that up. Much Appreciated.

If you want, feel free to!

@@JeremysITLab thank u 🙏

Sorry, just uploaded it!

I haven't read Lammle's books, only Odom's (which are very good). The general opinion of most people is that Odom is more in-depth but more dry/less interesting. Lammle has less depth than Odom but his writing style is more interesting and the books are easier to read.

@@JeremysITLab Thank you 👍

No difference!

You don't need to do an access list in both directions.

Put them into separate VLANs

@@JeremysITLab what if they are in the same vlan, can we do this with VACL?

it's a wildcard mask. you see the 203.0.113.0/30? it's a /30 subnet. /30 translates to .248 , which is 11111100 but remember the wildmask is the inverted subnet mask -- so 00000011 (2 + 1 = 3) , hence .3

If you've configured routers as instruction says then this is expected behaviour. It is because access-list applied on g0/0 interface allow traffic from pc 1 and pc3 only so any other traffic(including one from SRV2) to SRV1 is going to be dropped.

@@piotrwikarski9401 ah got it. Missed that part. Thanks

Piotr's explanation is correct! Good explanation ;)

To enable OSFP on both interfaces with one command.

Download the latest version of packet tracer from Cisco, then you'll be able to open all the files.

I have the same question....I assume you don't use the /24. You are allowing the last two octets so you set 255 for those octets.

Sorry, just uploaded it!

Thank you sir.

Did you add another host to 192.168.1.0/24 and try to ping it? If you tried to ping R2's IP, that will work because the traffic isn't being sent out of the interface.

Hi, did you write out the two network addresses and my ACL statement in binary?

@@JeremysITLab hello jeremy, I am sorry, I should have mentioned you. I was trying the boson one and watching your video and explanation so on step 4 the ip address 10.10.2.0 0.0.1.255 there was an explanation in boson but I did not get it how they/you calculate that.

@@susmitamazumder8390 Yeah I understand the question, I'm just asking if you wrote those out in binary? The network addresses and the ACL statement.

@@JeremysITLab i did write

@@susmitamazumder8390 And what did you find? Did the ACL statement with the /23 wildcard mask match both networks?

about 50 "days" he always says

@@nightowl6569 thank you Mr Owl.

Yeah about 50 days, max 60 days I think

I'm a noob, but let's learn together. From my understanding, 0.0.0.0 wildcard mask = 255.255.255.255 subnet mask, aka only those who match ALL 32 bits. (Like, tell the dating app to find hot moms in my area with specific age, hair color, eye color, breast size, foot size, who can make perfect risotto, and who's also into a specific faction in the Warhammer 40k universe, you'd simply get 0 matches by being so strict with your preferences. You get way more matches by loosening the conditions.) R2's s0/0/0 interface (203.0.113.2) belongs to 203.0.113.0/30 network. /30 = 255.255.255.252, 255-252 = 3 (wildcard mask is just inverted subnet mask, hence the 0.0.0.3), have to match first 30 bits. He told the router to activate OSPF on interfaces that fall only into the specified range of "203.0.113.0/30". The 203.0.113.2 (R2's s0/0/0 interface), falls into that range. So OSPF gets activated on it. Then, the router would advertise the network prefix of the interface (NOT the prefix in the "network" command). For example, earlier he told the router to activate OSPF on interfaces that fall into the 192.168.0.0 0.0.255.255 range. 0.0.255.255 wildcard mask = 255.255.0.0 subnet mask = /16, meaning those that match the first 16 bits. Both 192.168.1.0/24 network interfaces and 192.168.2.0/24 network interfaces, all fall into that range. Because we only care that the first two octets, the "192.168" portion match, not caring about the rest 2 octets. Like, no need specifying that only age 18-20 and age 20-40 may enter the club. You can just specify that anyone who falls to age 18-40 may enter. He just basically killed 2 birds with 1 stone by doing both in one command for convenience. But in 203.0.113.0/30 case, that club may be some weird kink club, where only people aged 40+ may enter, so you need to specify it stricter. Correct me if I'm wrong.

Because a /30 subnet mask is equal to 0.0.0.3 in wild card mask. /30 has block size of 4 and wild card is one less than block size, so 4-1=3. That's why 0.0.0.3

I don't know.

Hi, what time in the video are you asking about?

@@JeremysITLab 2:43 I understand it should match all the addresses, but i'm confused.

@@icecoldnoob6719 If I used the command 'network 192.168.0.0 0.0.0.255', which interface addresses does that match? Does it match 192.168.1.254 or 192.168.2.254?

@@JeremysITLab well, none of them, i just don't get it, did i miss something from previous lessons?

@@icecoldnoob6719 So why would we use 192.168.0.0 0.0.0.255 if it doesn’t match either of the networks we want to match? There are many possible answers that would match both 192.168.1.0/24 and 192.168.2.0/24, I just selected 192.168.0.0/16 for simplicity.

I don't know, you haven't given me any information about the configurations you did.

I was having the same issue, but realized that the access list name is case-sensitive. Re-applied it while my pings were running and they started to be denied. Not sure if this is your problem.

Which ping are you referring to?

Yes.

Sorry, just uploaded it!

@@JeremysITLab Top man, keep up the great work!

care to share the google drive link? I can't find it

@@johnkatende3 Top line of the description: 'Free CCNA 200-301 flashcards/Packet Tracer labs for the course: jeremysitlab.com/youtube-join/ '