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Unfortunately, the hierarchical nature of the address scheme would have made it hard to extend, strangely. If you own 123.234.345.456, then anything that starts with that has to be part of your network or it would be disaster. So, if they extended it with trailing four zeros, you would suddenly be the owner of more addresses than existed in the IP4 world. They couldn't give out any of those numbers to anyone else or it would be a security and routing nightmare.
Doing them as leading zeros could have possibly worked. Ultimately zeros have to mean 'unused', so they would have had to at least reserved one value in the new extended address space to hold all of the IPV4 ones. So maybe 0x7FFFFFFFxxxxxxxx contained all of the IPV4 addresses within it or something. But I'm sure there would have been a LOT of gotchas involved there as well.
But not sticking to the existing scheme also has some really nice benefits. One of them is that now every machine in your network can get an automatically assigned, guaranteed unique local IPV6 address without any sort of central management scheme to provide them. It's just derived from the MAC address. If everything locally just used IPV6, there would be no need for address management on the local LAN anymore, which would be a huge benefit.
You would always have more than one IP address if you have more than one network card, even in the IPV4 world. They are assigned at the network interface level.
Your address would change if you change the network card, but that's not much of an issue in principle since no one would generally be using the IP addresses directly, they'd be doing name lookups to get the addresses. IPV6 obviously encourages that scheme even more because of the fact that the addresses aren't very memorable.
In the case of DNS failure, it has saved me quite a few times when DNS crashed, and DNS on a large scale can die too look at the DYN Denial of service attack that affected most of the east coast, also for me numbers seem to be easier to remember than names or strings depending on the complexity so IPv4 was simple enough to remember.
Assuming that the site has an IPv4 address. One of the reasons for introducing IPv6 is that internet ran out of addresses; there is not one for everyone. In the years to come, we will see an increasing fraction of DNS entries having IPv6 addresses only. At work, we have so many machines that we have consumed the IPv4 addresses allocated to us, so they have IPv6 addresses only.
Another aspect with IPv4 vs. IPv6: The lack of IP addresses have lead a lot of ISPs to allocate IPv4 addresses temporarily, on demand, to their customers. The address you use today, someone else may use tomorrow. If you offer a service, you have to pay extra for a fixed IP address. Lots of companies dynamically translate a fairly small number of external IPv4 addresses to a large set of internal addresses.
With IPv6 there is no technical need for doing such temporary / dynamic allocations; all devices will (/may) have persistent IPv6 addresses. So if you have looked it up in DNS once, you may keep the translation "forever" in your local cache, and will not depend on DNS again for that address.
This is certainly not by definition; even IPv6 addresses may change (or e.g. a given service is taken over by a different device), but there is far less technical need to update or translate the IP address. Our dependence on DNS stability will be significantly reduced, once static IPv6 addresses are commonplace.
That also means that authorities who want to ban certain web sites will have far less use of DNS censorship; if you have obtained the IPv6 of some illegal site once, you don't need DNS any more. On the other hand: If you had one IPv4 address yesterday, another one two days ago, and a third one today, that would to a certain degree mask your use of dubious services. When you get yourself a fixed IP address, it is far easier to identify the traffic going to you from anywhere along the route, without tracing how your IP address changes over time.
Who claims that 32 bit is simple? I know it can be, but when I was teaching elementary computer architecture (as a software man, seeing architecture from a software man to software students) trying to explain the IA-32 mess has kept me forever away from attempting to learn IA-64. I had lost the architecture battle: I was fighting for MC68030 based *nix workstations (so it is long ago!), but the department head overruled the decision preferred by the majority of the teaching and technical staff, demanding that we go for Intel. In my lectures, I did sneak in some examples from non-Intel architectures, but couldn't give the students exercizes on anything but IA-32.
If Intel did a thorough cleanup with IA-64, it might be far easier to understand. I don't know. IA-32 gave me so many frustrations that I never wanted to touch another IA-whatever architecture.
The only thing that is impressive about IA-32 is how they can make that mess spin around as fast as it does. You would think that interpreting hodgepodge of instruction and addressing formats, the MMS and everything, would take so many clock cycles than any other achitecture could easily beat it. The fact that IA-32 essentially knocked down all competiton proves one thing: The hardware implementation guys at Intel must be super clever. I wouldn't say the same about those guys drawing up the x86 architecture. But that was long ago, of course.
they make everything anew so that common people won't know how things work anymore. it is not allowed for people to know all, how the car, the computer, the internet, the washing machine... works. you have time to learn only one thing in life and for the rest of things you can only be a consumer.
that thing moves the business, by making new things that brake how old things work.
and those new things are going to be explained by a mass of new technical abbreviations and acronyms that have almost exactly the same meaning as the old ones, but these are brand new.
and the hipsters are going to love this and show off.
at the same time science is moving in the opposite direction. scientists are trying to discover the unified natural law that explains everything.
Nah ... the leader died in 2012, and there was internal fighting about who took over as the son of gawd.
But it was never a "big church" or even a "big cult" even at its height - 30,000 across the US is less than TV evangelists manage after molesting choir boys and pilfering the offerings tray - it was "hyped" by the media is all I suspect.
Sent from my Amstrad PC 1640 Never throw anything away, Griff
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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They discovered - using probes of different kinds - that there was no intelligent life to be found here on Earth.
They will probably be back once cats take over as the dominant species... At least this one[^] will...
Anything that is unrelated to elephants is irrelephant Anonymous - The problem with quotes on the internet is that you can never tell if they're genuine Winston Churchill, 1944 - Never argue with a fool. Onlookers may not be able to tell the difference. Mark Twain
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