At which OSI layer is a source IP address added to a PDU during the encapsulation process? Posted on November 2, 2020 by Admin Last Updated on November 2, 2020 by Admin At which OSI layer is a source IP address added to a PDU during the encapsulation process? network layer data link layer application layer presentation layer For more question and answers: Click Here CCNA 1 ITN v7 – Modules 1 – 3: Basic Network Connectivity and Communications Exam Answers Full 100%