JNCIA-Junos: Juniper Networks Certified Associate – Junos (2024) — Question 51

What is the protocol data unit (PDU) of the Data Link Layer?

Answer options

• A. segment
• B. byte
• C. bit
• D. frame

Correct answer: D

Explanation

The correct answer is D, frame, as it is specifically the protocol data unit used at the Data Link Layer. Options A, B, and C refer to PDUs associated with other layers; segment pertains to the Transport Layer, while byte and bit do not represent protocol data units in the context of network layers.