protocol design application layer management information authentication gateway monitoring

security considerations message relaying mime confidentiality authorization application layer apex beep xml authentication statusrequest

proxy connection management security considerations firewall authorization application layer beep tcp standards track tunneling

requirements standards security telecommunications emergency services best available service signaling application layer network management ip telephony

abno traffic engineering signaling application layer network management routing interoperability mpls pce quality of service

packet dropping performance degradation censorship network censorship application layer privacy enhancement traffic interference transport layer dns interference technical mechanisms