WhatisNAT?WhyisthisbadforSIP?IETFsAnswer:InteractiveConnectivityEstablishment(ICE)TheICE9-StepProgramtoRecovery•Step1:Allocation•Step2:Prioritization•Step3:Initiation•Step4:Allocation•Step5:Information•Step6:Verification•Step7:Coordination•Step8:Communication•Step9:Confirmati