How DNS Works - Computerphile

I really love the idea of the waking up in the morning and going "OH NO is Google where I left it???"

I like seeing pen and paper.

thank you man

soooo mush thanks

I'm not sure I get how, for example, the root dns server get accessed to. For example, it cannot be by its name since it would trigger another DNS lookup. So I assume that some of thoses different kind of servers, if not all, have their IP adresses hardcoded and passed around everywhere. I just don't know and it's not explained.

DNS is the Saul Goodman of the internet.

How about the software that runs the DNS servers? Is it open-source or proprietary?

This Guy is Gifted.. I am Enlightened 💡every time I watch his explanations... Thank you.

Watched this video 2 years ago, didn't get much.
After recent studying, it all makes sense. Great video, this channels is a very helpful reference for top level explanations.

I am wondering why does it gets messy and have to add a query id to correlate request and response? Isn't it synchronous i.e. it waits for the server to return the IP (or suggestion to query another server). Also why would it accept a response from another (say malicious) server with same query id? whom it didn't even query (request)?

2 258 tenth street Mildura Victoria 3500

Kyla jones

Great explanation. One of the few people who explains computer concepts very simply. This is an art. Thank you very much.

Just set up my website, this stuff is really fun to code for :D

So name servers are recursive (?) DNS servers. Is that the same name servers configured when registering a domain as well?

This isn't really accurate. First of all, what sort of computer noob uses ping for dns queries?? There's this thing called net-utils that gives you the `dig` command which allows you to look up dns records. Moreover, cache records for a week??? Most people use 24 hours (ttl 86400) but Google in particular uses time to live of 1 hour. When you have a network of many servers serving content over a vast network you probably want to switch servers from time to time (and definitely not just once a week!) to handle load better. Yes, you have a reverse proxy and a load balancer, but with this much traffic you need multiple of those, hence regular updates to dns records and geodns

Can you please come to my university and teach computer networks for the new first semestlers? Damn I needed this channel and especially you back then... Thank you for this video, great work. Enjoying your way of describing things very much. ;)

Im wondering what creature is behind him in the vivarium

Niklas musst nen Perma Bann bekommen

Niklas hat nen kleinen

Yo Nyrocarion, what's up?

Can you make a video on bonjour / zero config network

Üö

Amazing explanation, thank you!

Thank you computer papi for consantly saving my studies

every once in awhile, i forgot that Computerphile is a double entendre and i get re-excited when i notice it again, lol. computerphile/computer_phile. [brain bMyBrain[] = Mind.Blown();

I like the awkward humor of this man. Would be nice to hang out with this dude for a bit.

Time to live vs time to live ... how come it is usually set in minutes? Surely it lives longer than that, or is this a setting that tells it how long it will take at the most to go live?

Ayyyy they kept the </> from bacc

He talks too much

The link at the end of Mikes Snake cannot be clicked on. Is there a link to that?

Wont it be possible to setup your own domains then by sending a new ip and domain to one of the servers?

Hello

I know less about DNS than I knew before watching this...

His accent is British! So wonderful!

Is that a lizzard you keep there?

I used to explain it as like making a (land line) phone call to somebody in another town. You look up the town where the other person lives, dial the STD code for that place and then their number. The same code might cover several towns, just as several websites might be served from the same IP address. The name server does the same job as the code pages in the back of the phone book.

"DNS is not verified. Reboot computer if there's no internet."-PDAnet

What's that video with the snake on the left at the end?

These Peter Parker knows really well the web...

Great video thanks.
You didn't talk much about cache invalidation, you just mention a TTL (how is it define, what happen if the IP changes before TTL expire, ...).
And when the IP is resolved, how route name server are updated to be able to redirect faster/closer the next time a computer asks?
Thanks a lot for your videos

he's saying a lot of words, and all I can do is watch his struggle with his overly tight sweater thing.

Root servers are not hard coded. You can down load an updated list any time