On Sat, 24 Feb 2001, Tim Seifert wrote:
> By: Colin Knight <[EMAIL PROTECTED]>
> On: Saturday, February 24, 2001, 9:45:14 PM
>
> CK> Can anyone here explain the significance of the Miami T/TCP option?
T/TCP is an enhancement to the TCP protocol that reduces the number of
packets associated with opening and closing connections. It has no effect
on the "meat" of the connection, so the impact is mainly on cases of
transferring small amounts of data in a given connection, such as a small
image file on a web page.
> CK> I'm particularly interested to know how you find out if you your isp
> CK> supports this function
>
> How I read it, suggests that it's not whether your ISP supports it, but
> the (web) servers you're dealing with.
Yes, it only applies directly to the endpoints of the connection.
However, some buggy VJC implementations have problems with it (not T/TCP
specifically, but TCP options in general), which is why it might need to
be disabled in some cases, and that *is* an ISP issue.
> CK> It doesn't seem to speed things up when I select it so am I wasting my
> CK> time?
>
> Sounds possible. If you see no improvement, then either it's not making a
> significant difference, or it's not supported on the servers you're
> accessing.
The effcet is pretty subtle (see above), and also it *never* applies to
the first connection to a given server, since it requires some per-host
information to be cached. Unfortunately there's no tool to display
whether this actually happened.
Fred Wright
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