Protocol analyzers: How to compare and use them

Protocol analyzers are the indispensable tools that your IT staff deploys on the network when it's not behaving properly. Sharp, experienced admins can examine the live network data or a saved packet-capture file and figure out why connections are intermittent, why users are complaining that the network is slow or they can't get to their file server, or why voice over IP isn't working in a branch office.