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Re: Lookup zip by IP address [message #172949 is a reply to message #172940] Sat, 12 March 2011 19:19 Go to previous messageGo to previous message
Twayne is currently offline  Twayne
Messages: 135
Registered: September 2010
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In news:ilg1uk$oj1$1(at)news(dot)eternal-september(dot)org,
Jerry Stuckle <jstucklex(at)attglobal(dot)net> typed:
:: On 3/12/2011 9:16 AM, Roy Smith wrote:
::: In article<ilfs0n$3ga$1(at)news(dot)eternal-september(dot)org>,
::: Jerry Stuckle<jstucklex(at)attglobal(dot)net> wrote:
:::
:::: For the record, IPv4 and IPv6 refer ONLY to the number
:::: of bytes in the IP address. They have NOTHING to do
:::: with the protocol itself

LOL, that IS part of the protocol, dummy!
:::
::: Actually, IPv4 and IPv6 *are* completely different
::: (although related) protocols. For sure, the most obvious
::: difference between them is the length of the addresses,
::: but there are other differences as well. The header
::: formats are different, and there are fundamental
::: differences in how they deal with options, routing, MTU,
::: traffic flows, etc. Wikipedia does a decent job
::: comparing the two
::: (http://en.wikipedia.org/wiki/Ipv6#Comparison_to_IPv4).
:::
::
:: Of course there have to be minor differences in the
:: headers to identify whether they're using IPv4 or IPv6.
:: And there have been some minor changes with the routing,
:: etc - but those could easily have been implemented in
:: IPv4, also. They just weren't.
::
:::: IPv4 was heavily used by Arpanet back in the 1960's -
:::: which would have been VERY hard to do if it hadn't been
:::: invented until 1981.
:::
::: To the best of my knowledge, the first RFC describing
::: what we now call IPv4 was RFC 760, published in January
::: 1980. This was updated by RFC 791, published in
::: September 1981. I'm not sure when the first experimental
::: versions were deployed, but it's absurd to say that IPv4
::: was in use (heavy or otherwise) in the 1960s.
:::
::
:: Then what was I using in the early 70's while in college?
:: And what was I working on in the late 70's when I worked
:: for IBM?
::
:: Arpanet used TCP/IP, and was in existence in the 60's.
:: And it used 4 byte addresses.
::
:: RFC's came about LONG after Arpanet was developed.
::
:::: I never hear anyone (except you) use IP to refer to an
:::: address. Everyone else uses the term "ip address" -
:::: which is correct.
:::
::: People often say "IP" when they mean "IP address" in
::: casual conversation. "I can't reach foo.com, can you try
::: pinging it?". "OK, what's the IP?" It's sloppy, but
::: lots of casual conversation is sloppy, and people figure
::: out the meaning from context.
::
:: Yes, casual conversations, I agree. But not like "Pointed
:: Head" indicated.
::
:: --
:: ==================
:: Remove the "x" from my email address
:: Jerry Stuckle
:: JDS Computer Training Corp.
:: jstucklex(at)attglobal(dot)net
:: ==================
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