What is a CDN | How Content Delivery Networks Work
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- เผยแพร่เมื่อ 31 ก.ค. 2019
- Have you ever wondered what a CDN is and how a content delivery network works? Well, I answer this question in this video.
CDN77: links.christitus.com/cdn77 .
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![What is CDN [Content Delivery Network]? and How It Works?](http://i.ytimg.com/vi/0QKjnCu6tAM/mqdefault.jpg)
*C D N IS SIMPLY CACHING OF WEB CONTENT AT MULTIPLE GEOGRAPHICAL LOCATIONS 😊*
This is the best simplification of it out there. Thanks for the comment Terry!
@@ChrisTitusTech *Your Welcome 😊*
A gross simplification but pretty much that's the goal.
Mirroring for short
Thank you, Chris. I thought it was a short form for CanaDiaN.
I just saw your comment.
You beat me to it. XD
Thank you never heard of this. I don't need it for my current business however, its something to consider for another business I have in mind! *Love your channel its so unpredictable in a great way* *Just keep knocking it out of the ballpark, your channel never gets old*
Thank you Chris.
my roomate insists on having the 2nd fastest connection we can get which is 325Mb download speed.
Im usually good with 10 Mb download speed so this is overkill.
how can i make money with this extra bandwidth? cuz we are paying 3 x 90 bucks each for power/internet
Great work Thank you
Content delivery networks are more than just web caching. It's a safe bet that the most "last mile" traffic these days is streaming video, and most of that wouldn't be possible without CDNs. Even with traditional TV, CDNs are replacing satellite distribution for TV networks. CDNs also provide private, reliable and secure backhaul for corporate video where Internet latency and unreliability cannot be tolerated. For instance, medical programming and remote procedures need high reliability circuits.
@steve lopiuk you could but that would be incorrect. For example, TH-cam operates a CDN for itself. If you watch a live stream on TH-cam, there's no way it can be cached locally, it's live. But that video goes through the CDN, not the Internet. CDN is not caching, it's private networking.
@steve lopiuk No, caching is something entirely different. A network is a network. The only function of a network is to move data between various points on that network. A CDN is simply a network that's not part of the Internet. As such, the CDN only carries data for paying customers, and nobody else. A content provider can bypass slow parts of the Internet by paying a CDN to get content from their location to an end user's location faster, just as you might pay an airline to get you to another city faster than you can drive.
Once you get to the destination city's airport, you're going to miss the car that you left at home, because the airport isn't your destination, it's somewhere else. You can spend time waiting in the rental car lines, or if you go to the city often, you could drive your second car to the other city once, and then it would be there for you every time you fly there. That's an example of caching.
Web caching used to be important 20-30 years ago when many parts of the Internet were slow, and when web pages were static. Today most web pages are dynamically generated, so each request returns a slightly different web page. These can't be cached because no two are the same. Live video can't be cached obviously, because you can't cache something that didn't exist before. And because streaming video uses antiquated and highly inefficient protocols that send a separate stream to every single client that requests it, your local ISP would rather pay for carriage of just one stream to its local point of presence than pay an upstream ISP to carry a million copies.
Streaming video companies don't like caching because if you can cache a whole video, you can copy a whole video and save it to watch without needing to pay the streaming company. What companies like Netflix do is make it easier for local ISPs to colocate their Open Connect appliances closer to the viewers, so the local ISP doesn't have to pay a higher tire ISP, and so Netflix doesn't have to pay a CDN. But this is *not* caching! Each Open connect appliance is a server of its own right. This is a technology called "edge computing" and it's going to be increasingly important.
So to summarize:
1. Caching is obsolete.
2. CDNs are private networks.
3. Edge computing moves servers from a centralized location to as close to the end user as possible.
Actually today I just looked into it, and you just released a video about it, the best!!! :)
CDN, especially free Cloudflare is great in a combination with cloud hosting like Google Cloud. Thanks to Cloudflare you can cache all of the static content and not only make is super quick to load (~50ms per request), but also minimize number of requests to Google Cloud instances. Thanks to that you can stick with Google Cloud free tier, make site load as quick as from local, expensive server and you get free SSL certificates on both ends. I love such combination. It's a game changer for me.
09:00 you have a visitor from India for quite a long time...
I've had some issues with CDN's in the past as a user. They worked out the glitches, but it was still annoying trying to grab updates.
CloudFlare got a free tiar, it is all you need until middle bussness.
Awesome explanations dude 👍
I am thinking to switch my regular rig to any Linux platform (As I am a gamer) So need ur suggestions for which distro should I use..!
I already used kali linux for some testing purposes. Now I want a permanent switch. So please suggest which distro should I choose. Love from India. 😊🇮🇳😊
So you don't have any Russians hacking your site?
All jokes aside awesome video, and your right most people don't want to wait more a long time anymore. I remember Dial Up when I was a kid, like 1 minute to get a site to load. Internet has come a long way.
Hi can you please make a video on simulator for CDN?
i kind of had a guess since i use noscript and enabling the main site alone does not work unless i also enable the CDN. (i had a lot of head scratching making Crunchyroll work!)
Yo Chris, first of all love your Vids, convinced me to try KDE and love it so far. Have you ever thought of adding descriptionary Animations to illustrate what you are talking about? Sure would be additional time spent on a video but would also help you explain.
As a non engineer I’m fascinated how explanations I hear really tell me nothing at all.
Are you showing your gcloud free website in this video
wordpress, puff pure html, css, javascript and php XP
_CDN stands for Canadian._
funny that DNS77 is the app i use to get rid of website trackers
btw it's on fdroid