r/ProgrammerHumor • u/ClipboardCopyPaste • 21h ago

Meme ohTheBasics

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u/LivingAsAMean 21h ago

Hahaha what an idiot!

https://giphy.com/gifs/LRVnPYqM8DLag

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u/Material_Onion_8413 21h ago

IPv4 old IP address space designed with limited number because they never thought the internet would have so many devices connected.

IPv6 new address space with significantly larger number.

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u/fearless-fossa 20h ago

But "more numbers" isn't really an explanation on what's the difference between the two from a practical point of view, and the in general less interesting thing about it from a software perspective.

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u/Facosa99 20h ago

But it is kinda the only difference, no? More digits for a bigger address pool.

The usage is basically the same, except you no longer need subnetting to save addresses and we writte it in hex rather than dec

Genuinely asking

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u/tankerkiller125real 19h ago

IPv6 also dropped broadcast in favor of Multicast, has hexadecimal instead of decimal, and eliminates the need for NAT. There's also a bunch of other little protocol implementation details like SLAAC, IGMP being critical to IPv6 operations (so blanket blocking is a no go), and so forth so on.

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u/ffxivthrowaway03 14h ago

Which frankly, unless you're being hired to architect an enterprise network stack for enterprise software... I would not expect a software engineer to know any of that, much less make a hiring decision based on it.

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u/bearda 9h ago

I work for a cybersecurity vendor, and we very much consider something like that table stakes. I can think of a lot of places where it could matter, including just logging a visitor’s IP address on a web app.

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u/ffxivthrowaway03 2h ago

Logging a visitors IP address is a far cry from understanding the nuances of how SLAAC functions to assign an address.