Internet connection extremely slow in most applications

Question

I have an aluminum iMac 2.4GHz. I also have an iBook G4. Both are on the exact same desk and connected to my universities internet connection.
The iBook can surf the internet fine, as well as download software updates with no problems. However, the iMac takes soooo long to open a webpage, and can only do it on half of the attempts. Using Software Update is a joke because it takes 5 minutes to download a megabyte, and then times out. Mail also has problems.
Stranger still, when I finally get to a download page to download some freeware, the download happens at normal speed.
When I restart in Windows XP, I can surf the net just fine and install updates and check mail.
I have opened Network Preferences on the iBook and iMac to compare, and they both have almost identical settings. Maybe this is where I need to look for the problem.
What can I do to solve this problem?

Answer 1

I have very little experience with wireless authentication protocols, so my answer is intentionally vague - hopefully someone can get you a better answer.
TTLS and PEAP are different authentication protocols used with wireless connections.
The first thing I'd try is to get to the network settings and try to change the iMac to use TTLS for authentication.
The WINS servers are kind of a strange happening...those settings will typically come from a DHCP server, is it possible that your iMac is holding on to DHCP settings from a different segment of the network you're on - have you tried renewing the DHCP lease (probably won;t help, but, you can try)
Jeff