Skip to main content

Here's what a VPN can't protect you from (but you need to use it)

By Administrator
The abbreviation " VPN " has slowly become established among average Internet users, which is certainly good, but the problem is that people have started to see VPN as the ultimate solution to all problems.
Post a Comment

How does Netflix deliver video content to so many users?

By Administrator
How does Netflix deliver video content to so many users?

According to measurements from the second quarter of 2017, Netflix has 103.95 million subscribed users worldwide - is it small? Of that, 51.92 million users are from the USA. During peak traffic, Netflix generates a third of all incoming traffic in the United States. How does Netflix provide all of these users with high-definition video content at all times without traffic congestion and image "braking"?

No, of course, they do not send all the content from one server, ie server farms, but use other solutions. You guessed it, it's Content Delivery Network Technology (CDN).

CDN is a network of servers deployed around the world and Netflix stores copies of its videos on those servers. For example: if a user from France wants to watch a video, he will not be sent video content from the USA but from the nearest CDN server, say from Germany, or France if the server exists there.

How CDN works / Source: KeyCDN
How CDN works / Source: KeyCDN

In this way, traffic congestion is prevented, ie. link, on the server and also increases reliability. Because if all the content was delivered from one server and an error occurred that caused the link to be terminated, no one in the world would have access to Netflix videos. In addition, each CDN server has its own backup server, so even if an error occurs on the original, a spare comes to the rescue. In addition, there is still a lot of protection, and if an error occurs that the entire CDN location does not work, the user will be redirected to the next nearest server.

However, Netflix is ​​so big that even some more advanced CDNs aren’t enough so they had to go a step further. Namely, they cooperate directly with some Internet Service Providers (ISPs), which allows them to install their hardware directly. These devices are called the Open Connected Appliance and each stores about 280 terabytes of video, which is almost the entire Netflix video database.

How does Netflix deliver video content to so many users?

For the end-user, this is a huge advantage and improvement. First, the user no longer has to connect to a remote CDN server (in a neighboring city or state) but can direct to an installed Netflix device located at his ISP - which is much closer and faster. And secondly, the Netflix device is with the ISP itself, video content does not stifle the internet traffic that takes place from the ISP to the world, and vice versa. In simple words: while watching your favorite movie in Full HD format on Netflix, the internet will work without interference and slowdowns.

But Netflix often releases new video content, so they need to update the video library on their ISP devices. They usually do this early in the morning (local time) when internet traffic is much lower.

Each of the devices is equipped with an internet link at a speed of 90 gigabits per second, which means that as many as 13,000 users can watch HD footage at the same time! And if that's not enough, Netflix can simply add new devices where needed.

To maintain the stability and speed of the system, only video content is stored on these devices. For all other content, such as sites, user data, payment systems, and search systems..., Amazon Web Services (AWS) is used. It is a massive cloud storage and processing system offered by Amazon and has flexible plans, so it is possible to easily "on the go" to purchase and increase server capacity as needed.

Labels:

Comments

Post a Comment

Popular this month

Samsung puts a camera under the screen - Notch is not needed!

By Administrator
Notch is the biggest flaw of smartphones today - period. For the vast majority of users, this is the main reason why they do not buy a phone, as well as for me. But Samsung has found a solution. True, Notch is only a transitional solution until companies find a way to place all the components on the front under the screen. Users demanded bigger and bigger screens, and smaller and smaller phones, so Notch was the only solution. Although it is present in many smartphones today, it is not generally accepted. Moreover, it is considered a flaw . Of course, the phone manufacturers told the story and tried to convince the users that Notch was ok, and many accepted that, and the others can't wait for that era to pass.
Post a Comment
Read more

Count a bunch of items IN SECONDS with this AI app!

By Administrator
If you work often with a large number of stacked items (boards, pipes, boxes…) you probably count them often. When that crowd is bigger, counting can take time. The AI ​​application will come to the rescue, which will do the counting for you in a second!
Post a Comment
Read more

What should you check before buying a used phone?

By Administrator
If you buy a used phone from an unknown person, or even from a known person, you must always check the phone for any damage - visible or hidden. But what all needs to be checked? How? That is exactly what I am writing in this article!
Post a Comment
Read more

Google offline maps - instructions

By Administrator
Google has recently added several new features to its maps, including Offline maps and turn-by-turn navigation. It was these two options that were missing so that Google Maps  that could be used as a standalone offline navigation app.
Post a Comment
Read more

[Windows] How to create an invisible folder

By Administrator
At the time when I got my first computer, games weren't that popular, so we researched the system, and the whole computer in general (at least I did). After discovering something interesting, we try to use it to "challenge" each other.
Post a Comment
Read more