Palo Alto Networks Cybersecurity Entry-Level Technician (PCCET) — Question 149

During the OSI layer 3 step of the encapsulation process, what is the Protocol Data Unit (PDU) called when the IP stack adds source (sender) and destination
(receiver) IP addresses?

Answer options

• A. Frame
• B. Segment
• C. Packet
• D. Data

Correct answer: C

Explanation

The correct answer is C, Packet, because at Layer 3 of the OSI model, the encapsulated data that includes source and destination IP addresses is referred to as a Packet. A Frame (A) pertains to Layer 2, Segment (B) is associated with Layer 4, and Data (D) is a general term used for application layer information, none of which represent the PDU at Layer 3.