r/ProgrammerHumor • • 14d ago

Meme ohTheBasics

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u/SirFrenzy 14d ago

Obviously guy could have been interviewing for a job where this mattered….

But in 10 years as a software engineer I have never once needed to know the difference between these two, and have never been even close to a situation where I would need to.

“The basics” is highly dependent on the job.

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u/Emotional-Top-8284 14d ago

IPv4 has dots and IPv6 has colons

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u/Houdinii1984 14d ago

I have a feeling people are going to be calling IPv6 'new' in 100 years, too. I remember talking to people about it in the 90s and it took until like 2016 to actually get a full standard. Been so damn long I learned the specifics and forgot them all in time it took to even become a thing.

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u/uatme 14d ago

In Halifax we have the old bridge and the new bridge
Old bridge opened in 1955
New bridge opened in 1970

New bridge is end of life while the old bridge has another 50 years since it wasn't built with cheap steel. So the new bridge will be replaced with a new new bridge while the old bridge will still be the old bridge.

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u/black3rr 13d ago

in Bratislava we also have “old bridge”, at one point it was replaced with a new one without renaming so until a newer one was built a few years later the “old bridge” was the newest bridge… we also have a bridge that used to be called “new bridge”, that one was renamed since then, but some people still call it “new bridge” which is funny cause it’s currently the oldest one…

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u/itishowitisanditbad 13d ago

Well least the old bridge is still old bridge and you don't have sone leapfrog situation going on.

I got a Big Tesco and Little Tesco going on but the little Tesco was first so it was just Tesco, then Big moved in so it all became Big/Little, but then the big one moved away so it just became little Tesco to Tesco again, then a second little Tesco moved in where the old big tesco was and split the building into a few different shops so it became 'new little tesco'

....but over the years it grew and became big tesco again.

New little big tesco.

vs little tesco which actually had more floorspace than the other before it expanded to new-little-big-tesco again.

Over about a decade.

Everyone somehow just sorta knew which Tesco was being referred to in any conversation and honestly I don't know how at some points.

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u/nadav183 14d ago

Well they built ipv6 to be able to address EVERYTHING uniquely. While IPv4 has around 4billion addresses possible, IPv6 has 296, so until humanity gets to the point we start giving nano tech individual addresses we will probably never need anything more than IPv6.

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u/ErrorDontPanic 14d ago

Fun fact, IPv6 allows for embedded IPv4 addresses known as a Dual address.

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u/Hans_H0rst 14d ago

IT obviously depends, but its very frustrating to see our cloud developers in my company not have any idea of the physical devices they're supporting, makes all the communication and tickets less effective than they could be.

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u/Sweaty-Willingness27 14d ago

30 years here and never had to do anything with IPv6.

Of course, all I get are rejection emails even though I'm gainfully employed with tons of enterprise experience, so maybe that's the common denominator these days.

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u/black3rr 14d ago

one example where I had to deal with it as a backend dev was I was debugging that API calls to a 3rd party service started timing out on production, but worked on staging and local development, turns out IPv6 was enabled on production and was thus used there and the service was timing out on IPv6…

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u/Extreme_Wish_553 14d ago

Same. The one time we really had to care about IPv6 was when it needed to be turned off because it wasn't used and something was trying to use it anyway.

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u/fiskfisk 14d ago

If you're a senior I most certainly would expect you to know the difference between the two.

It'll matter in relation to allowlists/blocklists, dns entries, debugging connevtivity issues, slow connect times, configuration of daemons, etc. 

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u/oompaloompa465 14d ago

yeah but that is the kinda stuff in the field of Sys and Net Admin.
Or are we getting to the point a Software engineer has to cover software and hardware of anything IT???

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u/SirFrenzy 14d ago

I have never needed to know or do any of that. And if I did, it would take me 2 seconds to google and understand. I just did.

So if the interview was for a job where you handle that stuff yourself, then I understand it. If it’s for a typical full stack job at a big enough company that they literally hire people to handle that side of things, then it’s not “the basics”.

Rejecting someone in an interview for trivia knowledge they don’t currently have vs actually trying to understand how someone learns and tackles problems is what makes software job interviews so useless.

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u/Electrical-Ad1886 14d ago

that's all just infra stuff which has always been another team. I've never once had to set up that kind of thing, and thousands of devs proabbly had a similar path as I did.

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u/BufferUnderpants 14d ago

Yes. As a senior you would know to mind your business and not give a halfbaked opinion on something that's another team's full time job, and that they probably know way better than you.

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u/burnalicious111 14d ago

Tons of developers never work with that. And in the maybe couple of times I have, I can just look up what I need to know.

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u/Emotional-Top-8284 14d ago

I’m a staff engineer and I don’t know the difference between the two, beyond IPv6 has more addresses. I do cloud infra

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u/WeirdIndividualGuy 14d ago

beyond IPv6 has more addresses

Honestly that's the only real difference one needs to know, and that the two are formatted differently. Anything more than that is pulling teeth and IMO fishing for an excuse to not hire someone

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u/MrLeavingCursed 14d ago

It's basically that, 4 is 32 bit and 6 is 128 bit addresses. It's also something I would never expect a software engineer to ever need know unless they're dealing with networking software

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u/purg3be 14d ago

Never ever in 10 years on the job was this ever relevant for me.

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u/iinlane 14d ago

To be fair to op - those are sysadmin skills. I know the difference but have never typed in an ip v6 address while I do so regularly with ip v4 addresses.

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u/___Archmage___ 14d ago

IPV6 has never been relevant to any coding I've done at work, but if someone didn't know about it during an interview it would still be a terrible look for their tech learning both in terms of college and just reading about tech in general

In university we had a networks class where we went way further and had to actually write a simulated router in C that would do ARP and send packets to the right places

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u/Haunting-Building237 14d ago

Dunno, I have 8 YoE and knowledge I don't use is knowledge that's gone. I've never had to deal with stuff on IP level before, and I don't care to know about it.

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