Very slow web browsing

For the last few weeks, the computer has been very slow to access web addresses via Safari. My old Powerbook G3, with Mozilla, works well so I don't think it is Comcast (cable provider). I am using airport for both. Cany anyone suggest how to diagnose the problem and fix it?

I'm somewhat skeptical of a network environment that involves a client installation; that would be my initial target of investigation here, particularly given previous problems reported here with this particular client on this system.
Do investigate the data link speeds and feeds first and not a particular browser, save as there are add-ins or plug-ins or such involved. This can involve ping testing from the shell, or otherwise measuring the bandwidth available through various protocols. (This will help determine if this is a generic issue, or if this is something specific to Safari or to whatever has been done with the network configuration here. Also try some file transfers (downloads) or such, and compare the differences among the systems. For ping, launch Terminal.app and issue the shell command
ping -c 10 www.google.com
to send ten pings to Google. Each one will tell you how fast the round-trip is. The speed reported will vary by your link speed, but I'd tend to expect less than 100 ms round-trip.
As for Safari, do try the Reset Safari option available in the Safari menu. That'll clean out most of the pieces, though not any plug-ins.
[Here are some instructions for uninstalling the client|http://discussions.apple.com/thread.jspa?messageID=1840414] -- I don't have Tiger around and I don't use clients for Internet access, so I don't know how current that set of instructions might be.
And failing that, (and as mentioned earlier) get your data off this box (ensure you have a backup) and reload it; verify the system and (given all that's happened here) I'd reload the box. That's a last resort, but given this stuff doesn't appear to be playing well together that may well be warranted; there's clearly something broken here.
As for the discussion, this is the Mac OS X Server forum; this appears to be the Mac OS X client software and involving an add-on network client, and not the Server software variant.

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