PDU function in layer communication process

Q.  What is the crucial function of Protocol Data Unit (PDU) in layer communication process?
- Published on 30 Oct 15

a. Transfer of user data by N+1 layer to N and N-1 layers
b. Exchange of information with the help of peer entities over the different network sites
c. Combination of Service Data Unit (SDU) & Protocol Control Information (PCI)
d. Passage of temporary parameter between N & N-1 layers apprise service function

ANSWER: Combination of Service Data Unit (SDU) & Protocol Control Information (PCI)

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