Azure DNS
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Video Transcription
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>> Hey, what's up, everybody, welcome back.
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In this lecture, we're going to be talking about
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Azure DNS and what it is?
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The learning objectives are to understand Azure DNS,
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we're going to be talking a little bit about what
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DNS is as a whole,
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and then we're going to be focusing
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on what you can do with it.
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What is the DNS?
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If you have to work in IT for any number of years,
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you've probably heard of the analysis,
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you might have even worked with it a little bit.
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DNS essentially is this large network
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of global servers that
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maintain almost a ledger or
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a database of where
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all the domain names are
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and their IP addresses underneath.
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Essentially what DNS does is it converts or translates
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domain names like cybrary.com into
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a IP address and the reason why,
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if you type in an IP address
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for a website into your browser,
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you will go to the website but it's very difficult for
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us human beings to memorize series of numbers.
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It's a lot easier for us to memorize
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names or domain names,
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we have created a technology called DNS,
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which allows us to translates domain names that we can
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read that are human-readable into IP addresses,
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which is something that computers understand.
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That's all DNS essentially is,
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there's a large network across the world where
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there's these companies that maintain these DNS servers,
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and whenever you make a DNS record change,
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you add MX records for email or something like that.
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It takes some time for
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those records to propagate across the globe,
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but you have to do that in order for you to
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surf or browse to that specific website.
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Depending on where you are,
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if you make a change to your DNS records,
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a site might be up in
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some areas and maybe not up in other areas because
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the DNS servers in
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those regions across the world haven't propagated yet.
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It's pretty complex and it's really cool stuff,
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it's also very troublesome if
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you are working in networking,
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you're making changes to a website.
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I've had this happen many times
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where I make a change and then I forget about
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DNS and the Psychoston
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and I got a bunch of people on my tail.
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They're all flipping out,
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they're all upset and we just
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have to sit and wait for DNS, think the propagations.
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It's a good thing to keep in mind,
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you definitely want to plan for DNS issues.
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One thing that I've learned many times over is to make
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DNS changes at night because
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it takes a few hours sometimes
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for those changes to propagate.
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If you're doing it during production hours,
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you're going to upset a lot of people,
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don't do that. Learn from me.
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Let's talk about Azure DNS.
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Azure DNS is the managed DNS service provided by Azure,
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that's all it really is.
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You cannot buy domains through Azure DNS,
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but you can host the DNS records for the domains,
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you have to go by your domain names
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from other companies like GoDaddy or NameCheap or
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wherever you want to go and then you can point
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the domain names to the Azure DNS managed
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service and you can make
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your DNS record changes there, that's all it really is.
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The different DNS record types that it supports are A,
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AAAA, CAA, CNAME, MX.
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Essentially everything you see
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right here within this list,
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I'm not going to go through the whole list there,
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but that's it right there and it's great because
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honestly as a web developer and IT operations,
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a DevOps engineer, all
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the various roles that I've played,
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I've never really dealt with records outside of those.
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The ones that I typically deal with are A, AAAA,
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CNAME, and MX and TXT.
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Just for what I've had to do on a day-to-day on
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DNS that's really,
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those are the core records side.
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Typically, we have to make changes to it,
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it definitely serves its purpose.
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Azure DNS is highly available,
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it's completely managed by Azure,
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you're not going to have to worry about
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underlying servers or infrastructure
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or software, they take care of it.
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It is any casts, it's going to be
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able to route people to
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the nearest Azure DNS server
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that's closest to the end-user.
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It's intelligent in OS sense,
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we do want that because that will help with
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low time and efficiency and
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it's just overall a really good service.
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Everybody, in this lecture we talked
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about DNS and what it is and we
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covered the various DNS management features
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that are available to us within Azure DNS,
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its features and capabilities,
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and that's about it but if you guys have any questions,
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feel free to reach out if
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not I will see you next lecture.
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