Understanding How DNS Works in Depth

In this movie we go over how DNS work from the client to the server. When we understand how DNS works it becomes much easier to troubleshoot.
This is a sample from our training at ITdvds.com. For complete training please go to itdvds.com

[@mustafizahmed4907]

Trust me I have got 7 years of experience as a system administrator and this is the best lecture I have found. Amazing

[@SF-jf3xv]

Salam bro, can you help me find a job?

[@mahanpathak24]

Who is this guy? This is the way to explain/teach. I found another guy who matches my expectations from a teacher. Excellent....

[@amitsaw9150]

Exactly...loved this guy

[@NapalmYourMom]

I'll tell you who he is. He is my hero.

[@LegitimateContent]

So helpful! High-level/beginner tutorials are often much more confusing than in depth tutorials

[@deovratj1990]

Very well explained. Finally understood the DNS in depth. Thanks a lot

[@ravenshroud]

Finally, someone explained this perfectly. I am going to use this to train our service desk.

[@xfodude8511]

I've only said I love you to my girlfriend and my parents... but I love this man.

[@jasonmiller1076]

I love to learn the whole process of something. That is how you become great at troubleshooting. Seeing the entire picture. Plus you didn't use some white board to explain it, we actually saw it as we would see it if we did it ourselves.

[@Haidarsattar]

The best lecture on DNS online a very realistic approach to trace DNS thanks you

[@starun6952]

I have been looking at a lot of DNS explanations but this one is by far the best. Thank you!!!

[@kingtewodrost3627]

I appreciate your valuable time. I love your detailed elaborations of this course. It really goes a long way in my IT career. Comprehensive, clear, concise, detailed and relevant. Great tutorials 👍👍

[@AaaAaa-yb2nb]

wow fantastic lecture, i would recommend this to anyone wanting to learn about dns

[@aerahtv0000]

The only good video i have found on KZbin, i logged in just to click like button. Thank You, Sir!

[@mahahe2020]

Finally someone on KZbin can explain something properly lol good job

[@alainbongbijunior]

Thank you for taking the time to do this video with practical examples. It goes beyond the high level explanation to how some configurations are done in windows

[@ravinarayanmiskin6179]

Thank you for not having a disturbing/distracting back music!

[@sagar7267]

Very clear and perfect explanation of DNS. Thank You...

[@TheDreamzFactory]

Brilliant, Smooth, Intuitive and to the point.

[@rajendeol]

Great explanation. Thank you for showing where you find the root and TLD management information.

[@freelance922]

Very understandable speech. Thank you. You made me understand what my teachers failed to.

[@ashwingovind6849]

So brilliant video. It helps to understand the DNS in a more practical way / application level. I will share the video. Kudos to ITdvds team. Appreciate the effort to make this video.

[@sameersutar9986]

The way you explained is excellent. Great Job Sir.

[@good_technical7676]

Very informative video, I have never seen in depth, luckily I got and gained knowledge DNS related. Thanks a lot.

[@saurabhsuman9561]

Best explanation ever had about dns thanks man

[@quentintarantino3806]

Wow. He got it. Explain it on live examples and everyone gets it. Thank you!

[@tamimthaher2405]

love your detailed elaborations of this course !!thank You

[@talk2srj]

Best ever video on Internet about DNS explanation. Who is the speaker ?

[@kaus2005007]

Best lecture.. dns concept is clear now

[@storaman12]

THANK YOU. Excellent. Very descriptive.

[@knight024]

Correction, putting entries in the host file does NOT input it in any cache. DNS is always (by default on linux/windows/mac) queried 2nd, the first query will always check your host file first. You can modify the order of lookups on linux by flipping the order within the /etc/nsswitch.conf file, not sure about doing this on windows but it maybe possible in the registry somewhere.

[@gamerluke7]

Thanks. The last part about how Windows appends the DNS suffix is very useful to know.

[@nastyninjata]

Great explanations. Thanks.

[@sunils5834]

concepts brilliantly explained. thank you!

[@jagdipsingh713]

Thank you great video and very thoroughly explained. I did not lose concentration once going through this video

[@BadriV]

Excellent explanation

[@ManojeetChatterjee]

Superb ..... very clear fundamentals .... excellent

[@Brohadude]

Great & helpful video, surely my exam will be easier after this.

[@tehseenaslam9611]

Excellent explanation.. Love the way he teaches.

[@yiannisserpico2646]

This is an awesome knowledge video!! And this is a fantastic teacher. Wish I could be in your classroom.

[@maximilianmusterhans4659]

Excellent video.

[@chrisandres6331]

Thank you so incredibly much for taking the time to do this

[@abidmohsen2724]

Thank you very much, indeed another best one from you!

[@harirajan4463]

I would say outstanding technical presentation and thanks for this

[@abdulrahman-mt9us]

Wow. Excellent and very clear and in depth explanation. Thank you very much. Hats off buddy.

[@vladislavkaras491]

It was a areally great video! Thanks!

[@hamidullahmuslih6301]

amazing work!

[@rajeshbabu6789]

Wish I would have come across this a few years ago. Anyways its never too late. A very great video. Subscribed.

[@shivakhatri3271]

You are amazing. You just made my life easier. Thank you

[@ArifMuradl]

Hi! In 15th minute, step 8. I did not understand. Why we need to send another request to ITDVD ''dns'' server? Maybe we just send HTTP request to itdvd's web hosting service? Or there is another dns server there?

[@funsyte]

Excellent !

[@xanvong1501]

Thank you ! Very well explaining and you actually showing us where things are! A+

[@lennoxkgalema1505]

The best explanation ipconfig /displaydns iterative query recursive query suffix Host File cache

[@ramyarj]

VeriSign used to be called Network Solutions, which spun off from the original governing domain resolution body InterNIC

[@jaydenritchie1992]

so cache poison on my local net, a script or website with a pop up which resolves for a set amount of secs this allows via lookup table to access the login screen?

[@SierraOnMinus]

This is the best tutorial.... Cheers!!

[@fransdresa]

Amazing explanation, this is the way i learn the best

[@abhiparay6454]

I really appreciate your hard work

[@shaneblack5063]

explained really well. i think i finally get how it works. thanks

[@amitshaw6422]

Excellent Explaination...loved it.

[@md.zahidhasansohan6921]

Video for putting your own softs on or is that possible. I can softbox so would like to up load my own softs.

[@peteamiri8356]

Thank you for great presentation. Excellent.

[@ayushhajela8198]

Amazing amazing amazing!

[@vijuvlogs]

All good here. Thank you for your explanation 👍 Who decides the DNS TTL value while caching?

[@lynnecromack4933]

Im studying Azure and this is all relevant.

[@rb7994]

Wow - what a great explanation. Thanks!

[@souravdas4593]

Excellent explaination! 🤝✌️

[@saurabhdhande7409]

Amazing, excellent, mind blowing

[@martinmintah541]

Great tutorial ... easy to follow 👌

[@Nmoor101]

What an explanation 👏

[@jonathanswanson6294]

In the example how does the dc01 dns server know the IP for the root hints dns server?

[@koffianicetkouakou8599]

Great explanation!!

[@abhishekknegi007]

Awesome video i never seen such Good exploration

[@Mj-nc3ub]

How do we get to know which query (Iterative or Recursive) used for name resolution?

[@damagee8141]

best movie ever

[@blahblahyou22]

What is preferred to use as a DNS server? Iterative or recursive and why?

[@philw7580]

Great, well explained. Many thanks

[@Nmoor101]

This is one of the most pretty 😍 explanation ... really thank you 😊

[@ceemihail]

Awesome explanation, thank you! One question, I hear of SOA is that like going to the root DNS and the root DNS updates all other DNS Servers with the new IP's when users request a specific IP? does that make sense?

[@romi4d561]

Well explained - On point

[@tharidhuheshan]

In soft One, there is relatively little although I will say soft One has so fantastic features and I tNice tutorialnk it is going places (Rated No 2

[@SokretHeng]

Very clearly. Thank you sir

[@jhlu-f2b]

dns default uses UDP port 53, why dns uses UDP procotol instead of tcp, in which case DNS use tcp

[@abdimohamed1554]

Thanks to you I finally understand DNS

[@manojbasuri762]

Thank you so much for creating the amazing video. It is the best one for DNS understanding. I want to request you one thing if possible. Can you please create a video for Proxy servers and how it works?

[@amarchhabra2175]

What OS are you using? Windows Server? Trying to figure out how to get to DNS Manager screen.

[@hidden53152312]

Yes you're correct it's windows server

[@ezraorina100]

You need to be on a computer that is set up as a DNS server. I don't know if installing active directory sets you up for DNS too. Look that up,, at least now you have somewhere to start

[@tariqsako]

Thank you so much. Excellent explanation..

[@GuruGulabKhatri973]

What if my primary dns server is shut down....will its query be resolved by an alternate dns server? And what if both goes down. We have two 2008r2 dcs . We are going to demote them,keeping the dns service. Both this dcs are primary and alternate dns servers to clients

[@sheffin007]

well explained

[@nicholascoyle9524]

thank you for this

[@anshikagupta4931]

amazing ground-up tutorial, kudos

[@mostafachellal239]

thanks, for this great course

[@justepicvideos8817]

iirc, this is not an iterative query, ISP dns server(dc01 in your video) is a recursive server, that always manages all requests by himself and collects answers. Servers like root, and tld would either forward you or send an error. That is called iterative. Correct me if im wrong

[@morso0]

Just Epic Videos hmmm...I agree with this. An recursive query should mean the server would forward the query to the next server and so on. Each server in the chain will await the reply and return the response to the caller. The referral back to the original client part seems inefficient. But, that would make sense in an iterative approach. Still, I am skeptical about this aspect of the video.

[@aninnymoose720]

Dude u absolutely should do a video on the infinite ways i can imagine a rasberry pi acting as a black hole for ads might be a security problem for the the uninitiated and misinformed....

[@anu845t]

this url is not working

[@kotic007]

I just discovered you! Great explanations!

[@dermot864]

so good ! why i didnt see this early

[@pachehra]

Great presentation !!!

[@RaeesKhan-pf4du]

I am sold!

[@waseemakhtar7541]

Well explained...

[@znatcn]

Great tutorial! I sometimes saw dns server is configured in a different subnet, for example ip:1192.168.1.2/24 gateway:192.168.1.1 but dns:192.168.6.1 . How is it possible?

[@pingon55555]

You have a router with either static routes or running a routing protocol that lets devices in network 192.168.1.x /24 communicate with devices (such as DNS severs) on network 192.168.6.X /24 . That simple :)

[@anirudh8575]

I have captive portal website and its extension is a "in". The authoritative name server for that website is a root server. Now an authoritative name server is a server that is giving the record to the client. What i don't understand is how can any website have its authoritative name server as a root server? Cause all the root server is doing is sending the query to a server that can do the job for you. It is not the one giving you the i.p address, but just redirecting you to the right server . Shouldn't the authoritative name server be the websites DNS servers?

[@ezraorina100]

you mean its TLD is {.in}?