www.submarinecablemap.com
what-happens-when
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www.submarinecablemap.com
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Hetzner continues its growth in the US with a new location
Hillsboro, Oregon's network connections have a lot of advantages. It's worthwhile checking it out here: https://www.submarinecablemap.com/ --Katie
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What is the internet?
Now you can say that you've 'seen' the internet. You can see the map here
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Fiber carriers to Bermuda
Looking at this site there are 3 companies that own/operate undersea cables to the US
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Sudden ping increase playing from South America, anyone else?
This unfortunately won't get you the whole picture, but using some tools you can determine how your traffic is routed in one direction, and possibly the geographic path it takes as well. For example, in mine, I can see based on the names that I know my traffic is going through Equinix San Jose (equinix-sj), then likely to Palo Alto (pao1, palo), then to Los Angeles (lax). By looking up who owns what IP addresses, I can also see that my traffic goes from my local ISP (Sonic) to Telia, then to Amazon. While concerning, you can effectively ignore all of the hops that say "Request timed out." as those just mean the hop wasn't responding to pings (or in the case of the very end, the game server itself likely doesn't respond to pings). Unfortunately though, this is only half of the picture, as this doesn't let me see the path from anets servers to me. For that, I would need an AWS instance with similar routing rules to anet's servers. Still, this may be useful, as I'm guessing your traffic is using a submarine cable to get to anet's servers in the US. These unfortunately often have issues or maintenance that can cause measurable connectivity impacts - I'm in the US and we have a node on the NLNOG Ring, and we get alerts of connectivity issues with Europe on a regular basis.
- Data Centers
- Dota in EU is far away from dead
- Why American Power Endures
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Zero Point Leet Seconds
Well. Significantly more than that due to latency from switches etc and also because of the fact that there's so little land along the equator, meaning there's only one cable that travels roughly equatorially. It's from Fortaleza, Brazil to Kribi, Cameroon: https://www.submarinecablemap.com/
If you set up a bunch of good first-surface mirrors, I'm pretty sure you could get to pretty much the speed of light. You'd have to put them pretty high up in the air to avoid hitting things (a problem for cables as well, obviously) but putting the beam 2km in the air would still only lengthen the path by 4pi km, or .03%.
I have always found it very neat that the propagation speed of a light wave in glass is roughly the same as electrical waves in a coaxial cable. Both are shockingly slow compared to air/vacuum, but for completely different reasons. In both cases the advantages in signal integrity are immense.
- Casual Friday - Rave edition
- Could the internet literally be broken?
what-happens-when
- What-Happens-When: An attempt to answer an age-old interview question
- What Happens When
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We have used too many levels of abstractions and now the future looks bleak
Agreed!
It reminds me of:
https://github.com/alex/what-happens-when
and how many of today’s CS-degree holders would barely understand any of it. As someone who has also “grown up with all the technology”, I’ve learned and experienced all that. But as a percentage of “software engineers”, there’s fewer and fewer that do every day.
- Step-by-step events when Browsing www.facebook.com after computer bootup.
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I just blew my interview!
There is a pretty comprehensive answer to number 2 here
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Are you skeptical about candidates that call themselves a "10x engineer"?
Ask them to describe what happens when you visit a website and grill them on every layer of abstraction, every implementation detail.
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You and me Anon, you and me
This is a classic interview question and it basically means "How does internet work?" It is great because it allows to check how many levels of understanding it a developer has. The answer may be quite lengthy, for example: https://github.com/alex/what-happens-when
- Any course that actually teaches me how a website is built?
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I have a question about subdomains and their DNS resolution
Perhaps you will find https://github.com/alex/what-happens-when useful.
- Tried and true interview questions/tasks
What are some alternatives?
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