18:48 they choose something short and similar ? What is interesting in practice this means: they choose something short, because their is 0 relationship between the caching starting point of a DNS-reply and a Alt-Svc-reply. DNS-caching starts at the resolver, which is usually at the provider or Google/Cloudflare DNS, etc. When you get the DNS-reply at your client device: the DNS TTL is: your-response-realtime minus their response realtime. I need to example: 2 people are trying to reach Pinterest with 10 seconds in between. Let's say the DNS TTL is 1 minute. The first will get a response: DNS TTL-expire in 60 second, the second will get: DNS TTL-expire 50 seconds. Which means the calculation is: 1 minute minus the time after the first requestor (10 seconds). So in practice: the Alt-Svc TTL is the same or longer than the DNS TTL. So it's pretty easy to hit an other endpoint which doesn't have QUIC.
Regarding head-of-line blocking, H2 is worse than H1 because with H1 browsers were encouraged to set up multiple connections, but with H2 there is a strict restriction to one connection per browser and per site. If browsers would use more connections, there would be less request per connection and less HoL blocking overall. But H2 still suffers from the flow control anyway, which causes window-over-window effects due to TCP (double round trips to refill), and H3+QUIC solves both of these issues.
20:47 they said: 'receive the response' aka downloaded the video (segment) might take 5 seconds in total, they are comparing apples to apples I'm sure. So similar size file with HTTP/2 and HTTP/3 on the different 4 categories.
@0:22 Is that rounded box with "HTTP/3 / QUIC" label not being aligned with its above and below boxes driving you mad as well? Or is it just me and my OCD?
@21:03 A chart with no axis label and axis unit for neither of its horiz and vertical axes. If my dev wrote this, I would fire them... or at least spank them!!!
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
my backend course backend.husseinnasser.com
Watch this video at 1.5
Well, busy is the new stupid.
I like the original speed
1.25 is pretty natural
better watch at 1x and understand
Hell no, not less than 2x
Interesting! Thank you, Hussein!
18:48 they choose something short and similar ? What is interesting in practice this means: they choose something short, because their is 0 relationship between the caching starting point of a DNS-reply and a Alt-Svc-reply.
DNS-caching starts at the resolver, which is usually at the provider or Google/Cloudflare DNS, etc. When you get the DNS-reply at your client device: the DNS TTL is: your-response-realtime minus their response realtime. I need to example: 2 people are trying to reach Pinterest with 10 seconds in between. Let's say the DNS TTL is 1 minute. The first will get a response: DNS TTL-expire in 60 second, the second will get: DNS TTL-expire 50 seconds. Which means the calculation is: 1 minute minus the time after the first requestor (10 seconds). So in practice: the Alt-Svc TTL is the same or longer than the DNS TTL. So it's pretty easy to hit an other endpoint which doesn't have QUIC.
Regarding head-of-line blocking, H2 is worse than H1 because with H1 browsers were encouraged to set up multiple connections, but with H2 there is a strict restriction to one connection per browser and per site. If browsers would use more connections, there would be less request per connection and less HoL blocking overall. But H2 still suffers from the flow control anyway, which causes window-over-window effects due to TCP (double round trips to refill), and H3+QUIC solves both of these issues.
im not gonna lie i didnt even realize http/3 was a thing
Can you cover CDN vs a Recursive DNS?
20:47 they said: 'receive the response' aka downloaded the video (segment) might take 5 seconds in total, they are comparing apples to apples I'm sure. So similar size file with HTTP/2 and HTTP/3 on the different 4 categories.
Hello Hussein, thank you for all these great videos! Will you check udemy database course questions?
@0:22 Is that rounded box with "HTTP/3 / QUIC" label not being aligned with its above and below boxes driving you mad as well? Or is it just me and my OCD?
Who is using Pinterest? What's their revenue model?
Women. Ads.
@@TigreXspalterLP Women
Architects, interior design professionals, marketing...
my gf for sure, Im pretty sure a lot of artists too uses pinterest for inspiration.
Interior designers use it a lot.
Hello sir, can you please tell me a medium where I can share my profile so that you can review it and can give me career guidance
your cool
@21:03 A chart with no axis label and axis unit for neither of its horiz and vertical axes. If my dev wrote this, I would fire them... or at least spank them!!!
There's already http/3? Calm down bro like I haven't even started http/2
why is a software engineer do good in networking
pinterest still exists?
Good video with great content including fake voice .
Fake accent u mean?😅
@@ItachiUchiha-fo9zg Low creepy voice.
whats w the hate?