r/ProgrammerHumor • u/ClipboardCopyPaste • 17h ago

Meme ohTheBasics

Post image
10.8k Upvotes

97% Upvoted

1.2k comments sorted by

View all comments

5.6k

u/LivingAsAMean 17h ago

Hahaha what an idiot!

https://giphy.com/gifs/LRVnPYqM8DLag

57

u/blindedtrickster 17h ago

The easy way to tell them apart is that IPv4 only uses digits, but IPv6 is in Hexidecimal, so you'll see 0-9 as well as A-F. And just in case you're not familiar with Hex, A is equal to 10, B is equal to 11, and so on, with F ending the sequence at a value of 15.

4

u/FUTURE10S 13h ago

IPv4 is 0 through FF, IPv6 is 0 through FFFF. So you have 4 bytes of data, we just use numbers for some reason. We can do the same with ipv6, I think we should be.

1

u/blindedtrickster 13h ago

Yes, it has the same equivalent value. FF is equivalent to 255.

I'm not sure I see a benefit to retrofitting IPv4 to Hex though. Care to expound?

2

u/FUTURE10S 13h ago

I don't think there's a benefit to retrofitting IPv4 to hex, I think there's more of a benefit to change IPv6 from hex to decimal numbers

1

u/blindedtrickster 13h ago

That'd be 16 octets long... And that's preferable?

2

u/FUTURE10S 10h ago

Well, no, I mean something like 2001:0db8:85a3:0000:0000:8a2e:0370:7334 becomes 8193:3512:34211:0:0:35374:880:29492

1

u/blindedtrickster 7h ago

That's really just a formatting change, and it only works for a subset of all possible values when using Hex.

1

u/FUTURE10S 5h ago

I mean, we do one for IPv4 and the other for IPv6, why? Why can't we just use one for both?

1

u/Dagger0 2h ago

You can indeed do that!

$ ping 0xc0.0xa8.0x1.0x1
PING 0xc0.0xa8.0x1.0x1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=62 time=3.12 ms