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What is DNS? Introduction to Domain Name System. SXSW giveaway!

Fasthosts are giving UK viewers the chance to win tickets, flight, and accommodation to SXSW 2020 by answering my Techie Test question: https://www.fasthosts.co.uk/davidbombal

What is DNS (Domain Name System)? How does DNS actually work? This video shows you practical examples of DNS in real time and includes Wireshark captures showing you actual DNS query and answer messages.

SXSW Trip: https://www.fasthosts.co.uk/davidbombal
Wireshark Course: See hidden link in video
SDN Course: See hidden link in video
Linux Course: See hidden link in video

What does DNS do? 00:01
Why do we use DNS? 2:10
Analogy of DNS: 4:00
SXSW: 5:25
Practical DNS: 7:30
Lab: 8:20
Wireshark capture of DNS: 9:50
Edit Windows host file: 15:45
Use a Cisco router as a DNS server: 18:22
nslookup IPv4 / IPv6: 23:09
Rogue DNS example: 24:35
Ubuntu DNS server setup (dnsmasq): 25:47

CCNA content:
Free CCNA content: https://www.youtube.com/playlist?list=PLhfrWIlLOoKM3niunUBTLjOR4gMt_uR_a

CCNA course: http://bit.ly/2PmTVPD

Free or Trial Network Software:
Solar-PuTTY: http://bit.ly/SolarPutty
SolarWinds TFTP Server: http://bit.ly/2mbtD6j
WAN Killer: http://bit.ly/wankiller
Engineers Toolset: http://bit.ly/gns3toolset
IP Address Scanner: http://bit.ly/swipscan
Network Device Scanner: http://bit.ly/swnetscan
Wifi Heat Map: http://bit.ly/wifiheat
Wifi Analyzer: http://bit.ly/swwifianalyzer
SolarWinds NPM: http://bit.ly/getnpm

Dnsmasq setup:
sudo systemctl disable systemd-resolved
sudo systemctl stop systemd-resolved

#Edit the /etc/resolv.conf file to contain the following entry:

#Now install dnsmasq
sudo apt install dnsmasq

#uncomment these lines:

#Add your domains below the no-resolv line:

#Set your public server to Google for example:

Packet Tracer
10x Engineer
Cisco Devnet Associate

CCNP Enterprise
CCNP Security
CCNP Data Center
CCNP Service Provider
CCNP Collaboration
Cisco Certified Devnet Professional
Cisco Certified Network Professional

Linux Professional Institute

Please note that links listed may be affiliate links and provide me with a small percentage/kickback should you use them to purchase any of the items listed or recommended. Thank you for supporting me and this channel!


#dns #sxsw #wireshark

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18 Responses

  1. mostafa adel says:

    this is bad i liked your previous videos before the holidays they were useful to the point entertaining and i learn from them or review some information a half an hour video and i watched 6 minutes of nothing sorry but you were better before

  2. Farid Sn says:

    UDP is used by Dynamic Name Systems as their base of communication

  3. Thank you so much David i have got all three courses however last month I purchased your SDN tutorials from Udemy but still got Linux and wireshark free.
    I am so happy…thanks David
    I wish you get more sponsors

  4. May I please know why ospf use ttl 1 whereas rip and eigrp use ttl 2.

  5. melendizli says:

    I give answer but "Invalid Captcha Response." message is coming

  6. As usual, you create unique content just keep going sir

  7. OMG thank you so much for the giveaway!!! I Cant believe you are giving away your Linux and Wireshark course!

  8. Amit Jha says:

    First of all I wanna thank you for all of your videos you provide a lot of valuable information to us.
    And I wanna ask a question that for beginner which one is better GNS3 Or EVENG to start for better understanding not for just clear the exam.

  9. Gajendra says:

    Thank you David for SDN give away

  10. Loader says:

    Thank you very much for this content. I've been looking for a good DNS tutorial for a while now!

  11. Please sir May we wait the course about CCNP enterprise ?

  12. medinusa1 says:

    You are a great man ! your Youtube channel is the most valuable in IT

  13. Ace Joseph says:

    I guess the prize giveaways are good for your viewers..

  14. Ace Joseph says:

    Wow David that's cool technology..

  15. Yaser Basaad says:

    That's awesome, I won free course " Linux" ohhh Thank you @David Bombal

  16. Empre Vision says:

    Thanks for sharing this valuable information. Everyday we learn more from you

  17. IPvZero says:

    Great to see you getting the support of sponsers, David. And so long as they're meeting your standards (ie high quality/no scammers) then it can only be a positive thing, imo!