| Re: Lookup zip by IP address [message #172973 is a reply to message #172972] |
Mon, 14 March 2011 13:29   |
The Natural Philosoph
Messages: 993
Registered: September 2010
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Michael Fesser wrote:
> .oO(D. Stussy)
>
>> "Jerry Stuckle" <jstucklex(at)attglobal(dot)net> wrote in message
>> news:ileocv$pkg$1(at)news(dot)eternal-september(dot)org...
>>> IP addresses can change as often as every transmission, or as seldom as
>>> almost never. They are not reliable.
>> Every transmission: No.
>> Every SESSION: Yes.
>>
>> One cannot have TCP sessions when it changes every transmission.
>
> Every single request may come from a different IP address. Sessions have
> nothing to do with TCP and are not bound to a particular IP address.
>
Indeed. If you are on a dynamically allocated broadband, you can
resynch and regain a different IP address on the connection without even
being aware of it.
I am monitoring IP addresses to a site, and I am pretty sure that the
same machine appears on any one of a fairly large pool of IP addresses
from time to time.
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| Re: Lookup zip by IP address [message #172974 is a reply to message #172972] |
Mon, 14 March 2011 13:40 |
Roy Smith
Messages: 11
Registered: November 2010
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In article <9iurn6pkg5iifq39ii9isstrqb7f8ncc95(at)mfesser(dot)de>,
Michael Fesser <netizen(at)gmx(dot)de> wrote:
> .oO(D. Stussy)
>
>> "Jerry Stuckle" <jstucklex(at)attglobal(dot)net> wrote in message
>> news:ileocv$pkg$1(at)news(dot)eternal-september(dot)org...
>>>
>>> IP addresses can change as often as every transmission, or as seldom as
>>> almost never. They are not reliable.
>>
>> Every transmission: No.
>> Every SESSION: Yes.
>>
>> One cannot have TCP sessions when it changes every transmission.
>
> Every single request may come from a different IP address. Sessions have
> nothing to do with TCP and are not bound to a particular IP address.
The concept of "session" (in the context of the ISO 7-layer model) is
somewhat vaguely defined, but in general I would agree with this
statement.
Most web applications maintain some state in a browser cookie which they
use to establish session continuity across multiple HTTP requests. Each
of those HTTP requests uses a new TCP connection. On a host with
multiple interfaces (or a mobile host), each of those TCP connections
could come from a different IP address.
Since HTTP sits on top of TCP, there is some logic to calling HTTP the
ISO session layer, but that's a bit warped. Certainly, the maintaining
of web application sessions via browser cookies is not something which
is part of HTTP itself. If you were to try to crowbar it into the ISO
model, it would really fall into some higher level, but such attempts
are usually futile.
As for the statement, "IP addresses can change as often as every
transmission", it's hard to say whether that's correct or not without
knowing how you're defining "transmission". If by "transmission", you
mean "HTTP request", then yes, it's correct. If you mean "TCP packet",
then no, it's not correct. If you mean something else, then I have no
idea if it's correct or not until I know what that something else is :-)
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| Re: Lookup zip by IP address [message #172975 is a reply to message #172974] |
Mon, 14 March 2011 13:54 |
The Natural Philosoph
Messages: 993
Registered: September 2010
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Roy Smith wrote:
> In article <9iurn6pkg5iifq39ii9isstrqb7f8ncc95(at)mfesser(dot)de>,
> Michael Fesser <netizen(at)gmx(dot)de> wrote:
>
>> .oO(D. Stussy)
>>
>>> "Jerry Stuckle" <jstucklex(at)attglobal(dot)net> wrote in message
>>> news:ileocv$pkg$1(at)news(dot)eternal-september(dot)org...
>>>> IP addresses can change as often as every transmission, or as seldom as
>>>> almost never. They are not reliable.
>>> Every transmission: No.
>>> Every SESSION: Yes.
>>>
>>> One cannot have TCP sessions when it changes every transmission.
>> Every single request may come from a different IP address. Sessions have
>> nothing to do with TCP and are not bound to a particular IP address.
>
> The concept of "session" (in the context of the ISO 7-layer model) is
> somewhat vaguely defined, but in general I would agree with this
> statement.
>
> Most web applications maintain some state in a browser cookie which they
> use to establish session continuity across multiple HTTP requests. Each
> of those HTTP requests uses a new TCP connection.
Not always, as I understand it.
http://en.wikipedia.org/wiki/HTTP_persistent_connection
However, such connections time out fairly quickly. So if you take more
than a couple of minutes to read - say - a page before moving on, you
get a new connection.
I think the idea is that when you hit a site with - say - a load of
images and css files you use just one connection to pull the lot down,
rather than multiple ones.
Thus preventing massive spawning of parallel processes at the far end.
But that's guesswork.
> On a host with
> multiple interfaces (or a mobile host),
Or a DHCP client that goes 'off line' briefly..
> each of those TCP connections
> could come from a different IP address.
>
> Since HTTP sits on top of TCP, there is some logic to calling HTTP the
> ISO session layer, but that's a bit warped. Certainly, the maintaining
> of web application sessions via browser cookies is not something which
> is part of HTTP itself. If you were to try to crowbar it into the ISO
> model, it would really fall into some higher level, but such attempts
> are usually futile.
>
> As for the statement, "IP addresses can change as often as every
> transmission", it's hard to say whether that's correct or not without
> knowing how you're defining "transmission". If by "transmission", you
> mean "HTTP request", then yes, it's correct. If you mean "TCP packet",
> then no, it's not correct. If you mean something else, then I have no
> idea if it's correct or not until I know what that something else is :-)
I think that's pretty clear. :-)
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| Re: Lookup zip by IP address [message #172977 is a reply to message #172957] |
Mon, 14 March 2011 15:39 |
Twayne
Messages: 135
Registered: September 2010
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In news:iliv2v$rlr$1(at)news(dot)eternal-september(dot)org,
Jerry Stuckle <jstucklex(at)attglobal(dot)net> typed:
:: On 3/13/2011 10:58 AM, Luuk wrote:
::: On 13-03-2011 03:33, Jerry Stuckle wrote:
::::
:::: You don't like my attitude? I REALLY DON'T GIVE A DAMN!
::::
:::
::: Why are you not interested in the opinion of others,
::: They might have something usefull to say,
::: I am not saying they are right, or wrong, but 'NOT GIVING
::: A DAMN' is ........off topic?
:::
::: If you really dont care about his opinion, than please
::: simple dont react on his post(s)....
:::
:::
::
:: Luuk, please read the previous posts and determine who
:: started this off-topic crap. This is typical of Bill B -
:: he has a self-righteous attitude and complains any time
:: someone posts using words he doesn't like.
::
:: And quite frankly, I really don't give a damn what someone
:: like him thinks. And as long as he keeps on with his
:: self-righteous attitude, I will keep telling him what an
:: anal orifice he is.
::
:: --
:: ==================
:: Remove the "x" from my email address
:: Jerry Stuckle
:: JDS Computer Training Corp.
:: jstucklex(at)attglobal(dot)net
:: ==================
Then why do you even bother to post? Besides being a power monger, I mean,
and wanting to belittle others?
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| Re: Lookup zip by IP address [message #172978 is a reply to message #172959] |
Mon, 14 March 2011 15:40 |
Twayne
Messages: 135
Registered: September 2010
Karma: 0
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Senior Member |
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In news:ilj69g$iab$1(at)news(dot)eternal-september(dot)org,
Jerry Stuckle <jstucklex(at)attglobal(dot)net> typed:
:: On 3/13/2011 1:46 PM, Luuk wrote:
::: On 13-03-2011 18:32, Jerry Stuckle wrote:
:::: On 3/13/2011 10:58 AM, Luuk wrote:
::::: On 13-03-2011 03:33, Jerry Stuckle wrote:
::::::
:::::: You don't like my attitude? I REALLY DON'T GIVE A
:::::: DAMN!
::::::
:::::
::::: Why are you not interested in the opinion of others,
::::: They might have something usefull to say,
::::: I am not saying they are right, or wrong, but 'NOT
::::: GIVING A DAMN' is ........off topic?
:::::
::::: If you really dont care about his opinion, than please
::::: simple dont react on his post(s)....
:::::
:::::
:::
::: i wil repeat myself:
:::
::: If you really dont care about his opinion, than please
::: simple dont react on (t)his post(s)....
:::
:::
::
:: And I will repeat myself. As long as he keeps on with his
:: self-righteous attitude, I will keep telling him what an
:: anal orifice he is.
::
:: --
:: ==================
:: Remove the "x" from my email address
:: Jerry Stuckle
:: JDS Computer Training Corp.
:: jstucklex(at)attglobal(dot)net
:: ==================
What a crackpot crockpot
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| OT Re: Lookup zip by IP address [message #172979 is a reply to message #172961] |
Mon, 14 March 2011 15:49 |
Twayne
Messages: 135
Registered: September 2010
Karma: 0
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Senior Member |
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In news:iljcuk$ear$1(at)news(dot)albasani(dot)net,
The Natural Philosopher <tnp(at)invalid(dot)invalid> typed:
....
:: Hint: Kill file is useful in this context.
::
:: Jerry is displaying the same sorts of characteristics I
:: have noted in dementia sufferers who are a touch paranoid.
:: In short everything is about Jerry, and whether he is
:: right or wrong. Not about the topic under discussion.
::
:: Experience showed me that the best thing was to agree with
:: everything said, and totally discount it. In the case of
:: someone you cared about. In the case of someone you didn't
:: care about, just 'walk on by'...
Actually, the best thing to do is just ignore him and hang him out to dry. I
plan to start doing just that but spotting this thread, had to get one more
set of comments about Jerry's attempts at power mongering, unsuccessful as
they may be, and his attempts to PO people, which also fails/ed. I'm quite
happy to see that most people on this group are actually thinkers and decent
participants with the exception of things like Jerry.
His trollishness won't stop until he has no one to create a troll fest
with.
::
:: Jerry has issues and problems. Unless his a friend of
:: yours, Luuk, accept that everyone here knows this, and
:: makes allowances.
I don't really know what you're saying there, but:
Jerry's "issues and problems" might be so, but that doesn't make him a
welcome participant. This kind of "thing" often thinks they are above the
law too but that's irrelevant, just as it s here.
HTH,
Twayne`
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| Re: Lookup zip by IP address [message #172980 is a reply to message #172962] |
Mon, 14 March 2011 15:51 |
Twayne
Messages: 135
Registered: September 2010
Karma: 0
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Senior Member |
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In news:iljdef$n8i$2(at)news(dot)eternal-september(dot)org,
Jerry Stuckle <jstucklex(at)attglobal(dot)net> typed:
:: On 3/13/2011 5:28 PM, The Natural Philosopher wrote:
::: Doug Miller wrote:
:::: In article <ilj69g$iab$1(at)news(dot)eternal-september(dot)org>,
:::: Jerry Stuckle <jstucklex(at)attglobal(dot)net> wrote:
::::: On 3/13/2011 1:46 PM, Luuk wrote:
:::::: On 13-03-2011 18:32, Jerry Stuckle wrote:
::::::: On 3/13/2011 10:58 AM, Luuk wrote:
:::::::: On 13-03-2011 03:33, Jerry Stuckle wrote:
::::::::: You don't like my attitude? I REALLY DON'T GIVE A
::::::::: DAMN!
:::::::::
:::::::: Why are you not interested in the opinion of others,
:::::::: They might have something usefull to say,
:::::::: I am not saying they are right, or wrong, but 'NOT
:::::::: GIVING A DAMN' is ........off topic?
::::::::
:::::::: If you really dont care about his opinion, than
:::::::: please simple dont react
:::::::: on his post(s)....
::::::::
::::::::
:::::: i wil repeat myself:
::::::
:::::: If you really dont care about his opinion, than please
:::::: simple dont react
:::::: on (t)his post(s)....
::::::
::::::
::::: And I will repeat myself. As long as he keeps on with
::::: his self-righteous attitude, I will keep telling him
::::: what an anal orifice he is.
:::::
:::: And behaving like an anal orifice yourself accomplishes
:::: what, exactly?
::::
:::: Surely it should be obvious to you by this time that
:::: your repeated suggestions on where he can put his
:::: exhortations have had no more effect on him than the
:::: exhortations have had on you. Considerably less,
:::: actually, since you appear to be having no effect at all
:::: on him, while it's clear that he's annoying you.
::::
:::: Hint: he's winning. And he'll continue to do so until
:::: you wise up and ignore him.
::: Hint: Kill file is useful in this context.
:::
::: Jerry is displaying the same sorts of characteristics I
::: have noted in dementia sufferers who are a touch
::: paranoid. In short everything is about Jerry, and whether
::: he is right or wrong. Not about the topic under
::: discussion.
:::
::: Experience showed me that the best thing was to agree
::: with everything said, and totally discount it. In the
::: case of someone you cared about. In the case of someone
::: you didn't care about, just 'walk on by'...
:::
::: Jerry has issues and problems. Unless his a friend of
::: yours, Luuk, accept that everyone here knows this, and
::: makes allowances.
::
:: LOL, from a has-been ditch digger who got fired because he
:: couldn't figure out when end of the shovel to use.
::
:: No matter you won't use your real name. You don't want
:: anyone to know what a pathetic has-been you are.
::
:: And everyone here sees it.
::
:: --
:: ==================
:: Remove the "x" from my email address
:: Jerry Stuckle
:: JDS Computer Training Corp.
:: jstucklex(at)attglobal(dot)net
:: ==================
No, but they sure see it in you, the off-topic queen of this group.
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| Re: Lookup zip by IP address [message #172981 is a reply to message #172965] |
Mon, 14 March 2011 15:54 |
Twayne
Messages: 135
Registered: September 2010
Karma: 0
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Senior Member |
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In news:iljtj3$b27$1(at)news(dot)eternal-september(dot)org,
Bill B <me(at)privacy(dot)net> typed:
:: On 3/13/2011 1:32 PM, Jerry Stuckle wrote:
::: On 3/13/2011 10:58 AM, Luuk wrote:
:::: On 13-03-2011 03:33, Jerry Stuckle wrote:
:::::
::::: You don't like my attitude? I REALLY DON'T GIVE A DAMN!
:::::
::::
:::: Why are you not interested in the opinion of others,
:::: They might have something usefull to say,
:::: I am not saying they are right, or wrong, but 'NOT
:::: GIVING A DAMN' is ........off topic?
::::
:::: If you really dont care about his opinion, than please
:::: simple dont react on his post(s)....
::::
::::
:::
::: Luuk, please read the previous posts and determine who
::: started this off-topic crap. This is typical of Bill B -
::: he has a self-righteous attitude and complains any time
::: someone posts using words he doesn't like.
::
:: There is no evidence, Mr. Stuckle, to support your
:: contention that I draw your attention to certain words.
:: I've passed on far worse that what you have to offer. I
:: draw your attention to being a bully.
::
:: There is evidence I started this, if by starting this you
:: refer to calling you out on being a bully. Agreed. I
:: started it.
::
:: Bill B
As a rule I don't really charge him with being a wanna-be bully but
certainly don't disagree. Usually when I decide to post to him it's to kill
some spare time and also to call him on misinformaton he has posted.
Misinformaton is often his greatest asset as evidenced by his many erroneous
posts.
HTH,
Twayne`
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| Re: Lookup zip by IP address [message #172982 is a reply to message #172966] |
Mon, 14 March 2011 16:02 |
Twayne
Messages: 135
Registered: September 2010
Karma: 0
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Senior Member |
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In news:iljva7$rpc$1(at)news(dot)eternal-september(dot)org,
Jerry Stuckle <jstucklex(at)attglobal(dot)net> typed:
....
::
:: Yes, I agree. You are a self-righteous anal orifice who
:: has absolutely nothing positive to add to this or any
:: other conversation. Take your attitude and stick it where
:: the sun doesn't shine, so it can be right next to your
:: head.
::
:: But you are very typical of a lot of trolls. Always
:: strutting your shit and blaming everyone else for your
:: problems.
I don't see that at all in him. But I see it in you.
::
:: If you don't like what I say, then don't read it. Because
:: I really don't give a damn.
I'll read what I wish to read, anytime I want to, for the comedic ignorance
you display so well. And I suggest you do give a damn, because you actually
work at perpetuating a trollfest once you so gleefully get one started, or
think you do, when in reality all people ae doing is giving you some of your
own medicine.
I could agree with everything you say if it were aimed at yourself instead
of others. Great job of projection there as a matter of fact.
As for not liking what you say, I consider it a service to point out your
misinformation and lack of anythiing useful to say. And if I do or don't
wish to read your posts, you have no control over that. I'll point out your
misinformation any time I happen to come across it. I don't look for it, but
it's plentiful and easy to come across when I want a short break from work.
HTH,
Twayne`
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| Re: Lookup zip by IP address [message #172984 is a reply to message #172982] |
Mon, 14 March 2011 16:07 |
Jerry Stuckle
Messages: 2598
Registered: September 2010
Karma: 0
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Senior Member |
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On 3/14/2011 12:02 PM, Twayne wrote:
> In news:iljva7$rpc$1(at)news(dot)eternal-september(dot)org,
> Jerry Stuckle<jstucklex(at)attglobal(dot)net> typed:
>
> ...
>
> ::
> :: Yes, I agree. You are a self-righteous anal orifice who
> :: has absolutely nothing positive to add to this or any
> :: other conversation. Take your attitude and stick it where
> :: the sun doesn't shine, so it can be right next to your
> :: head.
> ::
> :: But you are very typical of a lot of trolls. Always
> :: strutting your shit and blaming everyone else for your
> :: problems.
>
> I don't see that at all in him. But I see it in you.
>
> ::
> :: If you don't like what I say, then don't read it. Because
> :: I really don't give a damn.
>
> I'll read what I wish to read, anytime I want to, for the comedic ignorance
> you display so well. And I suggest you do give a damn, because you actually
> work at perpetuating a trollfest once you so gleefully get one started, or
> think you do, when in reality all people ae doing is giving you some of your
> own medicine.
>
> I could agree with everything you say if it were aimed at yourself instead
> of others. Great job of projection there as a matter of fact.
>
> As for not liking what you say, I consider it a service to point out your
> misinformation and lack of anythiing useful to say. And if I do or don't
> wish to read your posts, you have no control over that. I'll point out your
> misinformation any time I happen to come across it. I don't look for it, but
> it's plentiful and easy to come across when I want a short break from work.
>
> HTH,
>
> Twayne`
>
>
>
I knew this would bring out the troll again. Thanks for winning me
another $10 bet. Just wish it would have been $10 for every troll post
you made.
You never have contributed anything worthwhile to this newsgroup. No
wonder you won't use your real name and a real email address (even if it
is somewhat munged). But then trolls never do.
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
==================
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| Re: OT Re: Lookup zip by IP address [message #172985 is a reply to message #172979] |
Mon, 14 March 2011 17:17 |
The Natural Philosoph
Messages: 993
Registered: September 2010
Karma: 0
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Senior Member |
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Twayne wrote:
> ::
> :: Jerry has issues and problems. Unless his a friend of
> :: yours, Luuk, accept that everyone here knows this, and
> :: makes allowances.
>
> I don't really know what you're saying there, but:
> Jerry's "issues and problems" might be so, but that doesn't make him a
> welcome participant. This kind of "thing" often thinks they are above the
> law too but that's irrelevant, just as it s here.
>
You miss the point:
Let's say person x is a problem.
you have four options.
1/. Make em be different.
2/. Get someone else to sort them out.
3/. Ignore them
4/. Leave the area.
1/. It fails.
2/. There is no authority to appeal to.
3/. Is successful, and leaves the group open for valid exchanges as long
as most people follow it.
4/. Is of course what Jerry wants. Leaving him king of the stinking dung
heap as it were.
I rest my case
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| Re: Lookup zip by IP address [message #172989 is a reply to message #172975] |
Mon, 14 March 2011 23:50 |
Roy Smith
Messages: 11
Registered: November 2010
Karma: 0
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Junior Member |
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The Natural Philosopher <tnp(at)invalid(dot)invalid> wrote:
>> Most web applications maintain some state in a browser cookie which they
>> use to establish session continuity across multiple HTTP requests. Each
>> of those HTTP requests uses a new TCP connection.
>
> Not always, as I understand it.
>
> http://en.wikipedia.org/wiki/HTTP_persistent_connection
I omitted that because it seemed like an unnecessary complication to the
discussion. You are, however, absolutely correct that it is possible.
I really should have tossed "(in general)" in there somewhere.
>> On a host with multiple interfaces (or a mobile host),
>
> Or a DHCP client that goes 'off line' briefly..
Yup, that's another scenario where a machine could change IP addresses.
It's pretty common, however, for DHCP servers to give the same IP
address back to a given host (identified by MAC address) when it asks
for a new one.
I missed the beginning of this thread, but just looking at the subject
line, I should mention one other concept. Even with geolocation
databases, all you really know from the client's IP address is where
egress router is (assuming the client is behind a NAT or something
similar). For example, I used to work at a place that had a corporate
VPN. I'm located in New York, but when I was on the VPN, to an external
web server, my IP address looked like it was in Massachusetts because
that's where corporate headquarters were and thus where the VPN
connected to the outside world. So, if I was on the VPN and went to
moviephone.com, it would show me what movies were playing in the
Hopkinton area.
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| Re: Lookup zip by IP address [message #172990 is a reply to message #172989] |
Tue, 15 March 2011 00:25 |
The Natural Philosoph
Messages: 993
Registered: September 2010
Karma: 0
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Senior Member |
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Roy Smith wrote:
> The Natural Philosopher <tnp(at)invalid(dot)invalid> wrote:
>
>>> Most web applications maintain some state in a browser cookie which they
>>> use to establish session continuity across multiple HTTP requests. Each
>>> of those HTTP requests uses a new TCP connection.
>> Not always, as I understand it.
>>
>> http://en.wikipedia.org/wiki/HTTP_persistent_connection
>
> I omitted that because it seemed like an unnecessary complication to the
> discussion. You are, however, absolutely correct that it is possible.
> I really should have tossed "(in general)" in there somewhere.
I think its actual default behaviour these days, but I am not sure
enough to make that an assertion.
>
>>> On a host with multiple interfaces (or a mobile host),
>> Or a DHCP client that goes 'off line' briefly..
>
> Yup, that's another scenario where a machine could change IP addresses.
> It's pretty common, however, for DHCP servers to give the same IP
> address back to a given host (identified by MAC address) when it asks
> for a new one.
>
> I missed the beginning of this thread, but just looking at the subject
> line, I should mention one other concept. Even with geolocation
> databases, all you really know from the client's IP address is where
> egress router is (assuming the client is behind a NAT or something
> similar). For example, I used to work at a place that had a corporate
> VPN. I'm located in New York, but when I was on the VPN, to an external
> web server, my IP address looked like it was in Massachusetts because
> that's where corporate headquarters were and thus where the VPN
> connected to the outside world. So, if I was on the VPN and went to
> moviephone.com, it would show me what movies were playing in the
> Hopkinton area.
Indeed. Here in the UK all broadband is tunneled over a PPP over ATM
backhaul link. Those in general terminate either in London, or in maybe
Manchester or Glasgow, IIRC
Reverse lookup codes TEND to reveal where your ISP's HQ is registered -
unless you have a registered corporate IP address - , not where the
lines even terminate.
Manual tracerouting to the target is often the best way to guess where
the connection comes from, but even that is no guarantee of anything,
for the reasons you give.
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| Re: OT Re: Lookup zip by IP address [message #173001 is a reply to message #172985] |
Tue, 15 March 2011 15:17 |
Twayne
Messages: 135
Registered: September 2010
Karma: 0
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Senior Member |
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In news:illijm$kb2$1(at)news(dot)albasani(dot)net,
The Natural Philosopher <tnp(at)invalid(dot)invalid> typed:
:: Twayne wrote:
::
:::::
::::: Jerry has issues and problems. Unless his a friend of
::::: yours, Luuk, accept that everyone here knows this, and
::::: makes allowances.
:::
::: I don't really know what you're saying there, but:
::: Jerry's "issues and problems" might be so, but that
::: doesn't make him a welcome participant. This kind of
::: "thing" often thinks they are above the law too but
::: that's irrelevant, just as it s here.
:::
::
:: You miss the point:
Nope, I agree with your assessment 100%. Ignoring the trasher is the best
plan by a long shot. I know I've violated that premise with our resident
troll/phisher but I'm done now with the exception of calling out
misinformation in a reasonable and sensitive manner. I'd rather be answering
qustions where I can and helping others.
Regards,
Twayne`
::
:: Let's say person x is a problem.
::
:: you have four options.
::
:: 1/. Make em be different.
:: 2/. Get someone else to sort them out.
:: 3/. Ignore them
:: 4/. Leave the area.
::
:: 1/. It fails.
:: 2/. There is no authority to appeal to.
:: 3/. Is successful, and leaves the group open for valid
:: exchanges as long as most people follow it.
:: 4/. Is of course what Jerry wants. Leaving him king of the
:: stinking dung heap as it were.
::
:: I rest my case
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| Re: Lookup zip by IP address [message #173397 is a reply to message #172990] |
Thu, 07 April 2011 17:01 |
Tobiah
Messages: 30
Registered: April 2011
Karma: 0
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Member |
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>>>> Each of those HTTP requests uses a new TCP connection.
>>> Not always, as I understand it.
>>>
>>> http://en.wikipedia.org/wiki/HTTP_persistent_connection
>>
>> I omitted that because it seemed like an unnecessary complication to
>> the discussion. You are, however, absolutely correct that it is
>> possible. I really should have tossed "(in general)" in there
>> somewhere.
>
> I think its actual default behaviour these days, but I am not sure
> enough to make that an assertion.
From Wikipedia:
In HTTP 1.1 all connections are considered persistent unless declared
otherwise[1]. The HTTP persistent connections do not use separate
keepalive messages, they just allow multiple requests to use single
connection. However, the default connection timeout of Apache 2.0 httpd
[2] is as little as 15 seconds[3] and for Apache 2.2 only 5 seconds.[4]
The advantage of a short timeout is the ability to deliver multiple
components of a web page quickly while not tying up multiple server
processes or threads for too long.
So if you load a bunch of images, they will all come down over
the same connection, but by the time you move to another page,
it's likely that the connection will have been dropped by that time,
depending on server settings.
Toby
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