DNS Explained | Domain Name System | Cisco CCNA 200-301

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The Domain Name System (DNS) plays a very important role in modern-day networking. It's an unsung hero that allows us to use the internet in the simplest way possible. Without DNS, our connected lives would look very different.

DNS will take our domain name, and translate, or resolve it, into an IP address.

Remember, web servers do not work with domain names, so your computer needs to translate this into an IP address.

The first thing it does is check its local cache both on the computer and the browser. There’s also a local configuration file that's checked.

The root server will then refer us to the top-level domain server (TLD) for .com. A TLD server is a server that contains information for domains with a specific extension. For example .com .org .net etc

The TLD server will then refer us to the authoritative nameserver.

Out computer will now be able to contact the webserver using the newly discovered IP address.

#ccna #cisco #networking

[anup_narvekar]

I've checked 10+ videos from popular sources on DNS resolution, everyone has a variation of their own while explaining DNS lookup, leaving me in confusion. They can spend hours in making those attractive animations, but can't afford to spend time in researching on how to actually demonstrate the DNS resolution process. You made the entire process very clear with a practical demo, so really thanks for that! Respect++ for your knowledge and research. My research on DNS resoluting ends here!

[Karter]

Just watched most of these videos this morning. I learned and retained more information here than I have in my Internet class at University. Thank you

[itaybarok]

Your using of wireshark and clear images are highly useful.
I learned the root, TLD and Authoritative that are hiden in the process of giving the ip of a url so that we can use it the reach the server. Also I saw that dns uses cache which is really effective.
I also saw the type A of IPv4 and type AAAA of IPv6 in wireshark.

[AnasMations]

I've checked 3 sources trying to understand DNS but yours was the most clear and straight to the point explanation.

Thanks!

[guyot]

Just found CertBros. Glad I did! Im here to echo all the other positive comments. Well done! I especially appreciate the bite size chunks, Easily digested, and easy to go back and review. Dense 90 minute videos are too much to take in. Thanks!

[cammycool]

3:37 - Top level domain server or TLD ;-)
Thanks so much for these, big bro! You're a legend! Coolest IT videos in internetz!

[taydorion]

I swear I appreciate you guys so much I needed this break down !!! 🙌🏽

[bossvoip]

Awesome! Very well explained and I like the wireshark bit as well

[tubadurantdoda]

Thank you Certbros for being so awesome!

[charlesluhmann]

Incredible video. The best I've seen on explaining the basics of DNS.

[divyanshuverma]

Love you bro ...
Stay blessed and happy 🎊
Keep up the great work !!!!

[adriennewilson]

New subscriber here! I love ur videos & there simple to understand. I just can’t watch a 60 minute video 😭 I need short & to the point and you’ve mastered that so Thk u!!

[omarebadah]

The most facilated explanation! Thank you Man!

[muhammadraza]

Oh my goooddd. He is master in explanations😍
I subscribed

[jamesgriffin]

Wow this video was amazing. You guys are great very easy to follow

[davidbell]

Mind blown but extremely interesting. Thank you 👌

[elmehdibenseddik]

Great Tutor and interesting video contents... Thank you to keep posting

[habtamusium]

what understandable methodologist r u ? u did clear my mind, i must subscribe to learn more esp networking, i am in love wz system and spend time everyday to know about. much thanks !

[dencam]

Thanks for sharing this.

I have just booked for my CCNA exam in 2 weeks.

[tresmcneil]

Awesome tutorials thanks. How do non TLDs differ from the basic TLDS? I see a lot more of those lately.