Summary:Configuring and testing PPP Callback is an important part of passing the Cisco CCNA and CCNP exams - but it's also important in production networks.  Learn the "hows" and "whys" of PPP Callback from Chris Bryant, CCIE #12933. Keywords:ccna, ccnp, free, exam, ppp, callback, isdn, caller, client, server, pass, bcran, tutorial, bryant Article Body:You may run into situations...