Wildcard Masks -- What are they? How do you convert them? What are they used for?

In this video we'll be discussing Wildcard masks. We'll answer the questions: What are Wildcard Masks? How do you convert between Subnet Masks and Wildcard Masks? And What are Wildcard Masks used for?
A pre-cursor to this video is to understand Subnetting and Binary.
Learn Subnetting by watching the Subnetting Mastery video series:
• Subnetting Mastery
subnetipv4.com/
Learn Binary by watching this video:
• Binary - The SIMPLEST ...
00:00 Start
00:40 Basic Definition of Wildcard Masks
00:55 Binary Conversions (CIDR to Subnet to Wildcard)
02:38 Special Wildcard Masks: /32 and /0
03:38 Easier Conversions between Subnet Masks and Wildcard Masks
06:36 What can you do with a Wildcard Mask?
07:25 Determine if two IP addresses are in the same Subnet
09:42 Identify IP addresses in a particular Subnet
12:18 How is a Wildcard Mask different from a Subnet Mask?
12:55 Discontiguous Wildcard Masks
Follow up Video covering Discontiguous Wildcard masks:
• Discontiguous Wildcard...

[@PracticalNetworking]

The video discussing *Discontiguous Wildcard Masks* has been released:
czcams.com/video/57ZcCuJ90qQ/video.html

[@runrunsomethings5229]

Thanks for sacrificing your time to do all this videos. Your´re a Hero.

[@PracticalNetworking]

You're welcome. Glad you enjoyed it =)

[@francisjura4812]

In all honesty, you are a natural teacher, a teacher per excellence. Thank you very much for your direct and really well broken down style of teaching with more than adequate easy to grasp examples and exercises. Thank you!

[@PracticalNetworking]

You're welcome, Francis. THank you for the kind words =)

[@VeryEasyCookingmymana]

Yes %100

[@shawncook323]

Thank you Sir.. it amazes me how I can spend the whole day at school being taught something, not understand, then go on YT, watch a few short videos and instantly get it!!

[@PracticalNetworking]

You're not alone! Have you ever heard of the Khan academy? There's a TED talk about it from a few years ago that I would highly recommend.
In any case, glad you enjoyed the content. Cheers, Shawn.

[@davidjerome8025]

Thanks for clearing up a whole lot of things for me. Your /25 /26 /27 /28 charts and reference to "That Chunk" really cleared a lot of stuff up. I appreciate you.

[@PracticalNetworking]

Glad it helped, David. You're very welcome!

[@infotechyeti]

dude. golden as always. super easy at explaining this. i scheduled my ccna 200-301 for november and hitting the studies. thanks again Ed.

[@PracticalNetworking]

Excellent, Jonathan. Good luck with your CCNA studies. Glad you enjoyed this video.
The rest of my CCNA content is all here:
www.practicalnetworking.net/index/ccna/

[@seca_999]

gold mine this channel

[@ernestmbila5047]

This is the best networking video i have seen lately. thank you

[@ciscobatais2]

explained better than official cisco ccna training itself. well done 👍

[@charan_75]

Best content. Thanks for your time and for sharing your knowledge with us.

[@PracticalNetworking]

You're welcome, Charan. Glad you enjoyed it!

[@ikiyytours2320]

Thank you very much...now I understand it.

[@PracticalNetworking]

Glad to hear. You're very welcome !

[@aradhanasharma3099]

Thank you so much for uploading those videos.

[@PracticalNetworking]

Glad you enjoyed them, Arad. =)

[@BekoIQ]

When we lose our time in Google to understand wildcard and you have explained in 14 minutes thanks bro

[@PracticalNetworking]

Thanks for the kind words =)

[@user-id7ih3bc4b]

What great teacher I didn’t even know it got that advanced but that’s a lot on this information

[@chriskhlee3825]

splendid and brilliant explanation.

[@PracticalNetworking]

Thanks Chris. Glad you enjoy it!

[@MusaTheGamer]

Epic video

[@robertgeorge5020]

this is awesome thanks !! big fan haha

[@PracticalNetworking]

Glad you enjoyed!

[@ifeelkiing]

Thank you Sir..

[@Lashan_]

This was awesome

[@PracticalNetworking]

Thank you!

[@Tombys]

thank you very much this video saved me i was about to have an exam on this

[@brian7744]

Ty !!!😁👏

[@PracticalNetworking]

Yw!

[@User107D]

its explained so good that even I understood and I have 0 IT certs behind 😁

[@PracticalNetworking]

That's fantastic =). Glad to hear it makes sense ^_^

[@VeryEasyCookingmymana]

Thanks

[@kumaragurunathans7917]

You are making networking easy for us, thank you so much.❤ Can you also make a video or article by explaining the TCP protocol in detail, i mean packet by packet analysis? I could rarely see good detailed explanation for TCP-UDP around internet(all i can get is TCP-UDP differences), even in my CCNA course nobody explained me well, but it needs packetwise understanding while we search for jobs. So if you cover the topic it would be great help for us, because you are very good at explaining things especially a dull or dumb student like me. Once again thanks😎👏

[@PracticalNetworking]

TCP is on my list. I'm working on an SSL/TLS course at the moment.

[@kumaragurunathans7917]

@@PracticalNetworking Thank you so much for the reply 💛, TLS also most wanted topic. Eagerly waiting.😊

[@k2k4]

I was wondering how I encountered a network with a 255.255.253.0 subnet mask.. I'm fairly certain it was a typo but the network was acting oddly (not connecting to certain devices).
In binary 11111101 is 253, so it's between /23 and /24. How could that work?

[@PracticalNetworking]

It could very well be a Discontiguous Wildcard Mask: czcams.com/video/57ZcCuJ90qQ/video.html
Although, my first inclination would also be that it was a typo. Discontiguous wildcard masks are pretty rare.

[@aqilfitri359]

may i know why the subnet is 192 (i already watch the subnet part)

[@jhde9067]

At 8:03 , how did you determine that this was the subnet mask we needed?

[@PracticalNetworking]

From Subnetting =). I teach Subnetting in this playlist: czcams.com/play/PLIFyRwBY_4bQUE4IB5c4VPRyDoLgOdExE.html

[@odrommouniengue2645]

hello sir, how can i combine two devices into a single wildcard mark? i mean i could be given the task where there are two devices that i have to deny the access to servers by using a single rule. thank you for your help

[@PracticalNetworking]

What you are looking for is what's called Supernetting, or IP Aggregation. I made another video about that here: czcams.com/video/Q4MArJTbUwk/video.html

[@seandylan4845]

I don't know what wildcard mask or subnetmask is but this is interesting. lol

[@susmitamazumder8390]

Hi I have a question like when there is 2 network e.g 10.10.2.0/24 and 10.10.3.0/24
how do I calculate the wildcard mask for 2 of the network together

[@PracticalNetworking]

You could convert both IP addresses to binary, and build a Wildcard Mask where (starting from the left) there is a '0' in every column where the bits are identical. Then when you come across the first column where the bits are different, everything else in your wildcard mask is a '1'.
Alternatively, the question is mostly just a Subnetting question. In which case I'd direct you to my Subnetting training series:
czcams.com/play/PLIFyRwBY_4bQUE4IB5c4VPRyDoLgOdExE.html

[@susmitamazumder8390]

@@PracticalNetworking thank you for your reply. I am watching your videos regularly. I was doing acl. Figured that out.

[@PracticalNetworking]

@@susmitamazumder8390 Excellent. Well done =)

[@emmanuelkwesi1412]

Hi Sir, how can I become a member of your platform in order to view the videos slated for "only members" Thanks.

[@PracticalNetworking]

Hi Emmanuel, thank you for wanting to join =). You can find the "Join" link next to the Subscribe button. Or use this link:
czcams.com/channels/KmU-GKiukM8LYjkJFb8oBQ.htmljoin
Cheers!

[@emmanuelkwesi1412]

@@PracticalNetworking Thanks Sir.