* What caused you the worst headache in 2003?
* Packeteer aims to allow managers to limit bandwidth available for music downloads
Early adopters report transition has been easier, less expensive than predicted.
* Customers choose IP VPNs as flexible networks
* A look at Equant's closest competitor, Infonet
* Industry consortium pushes for use of global domain names
* ISPs test IPv6 but the rest of the business world won't be deploying till 2007, say experts
* The knotty issue of supporting non-English language characters in e-mail addresses
* VeriSign: Organized groups, not teenage opportunists, likely behind 'Net attacks
* VeriSign launches Internet security service
