XP Processor Intermediary XP Processor Intermediary XP Processor Application Message (Application Headers+ Application Bodies) XP Layer Entity XP Layer Entity XP Layer Entity XP Layer Entity XP Layer Transport Intermediary Transport Intermediary Transport Intermediary Eg. HTTP Proxy SMTP message router Underlying Communication Protocols XP messages
XP Processor Messaging Intermediary Application Intermediary Application Message (Application Headers+ Application Bodies) XP Layer Entity XP Layer Entity XP Layer Entity XP Layer Transport Intermediary Transport Intermediary Transport Intermediary Eg. HTTP Proxy SMTP message router Underlying Communication Protocols XP messages XP Layer Entity
XP Application Messaging Intermediary Application Intermediary Application Message (Application Headers+ Application Bodies) XP Processor XP Layer Transport Intermediary Transport Intermediary Transport Intermediary Eg. HTTP Proxy SMTP message router Underlying Communication Protocols XP messages XP Processor