CCNA Routing and Switching (legacy) — Question 69

Which six-byte field in a basic Ethernet frame must be an individual address?

Answer options

• A. SOF
• B. FCS
• C. DA
• D. SA

Correct answer: D

Explanation

The correct answer is D, SA, which stands for Source Address and must be a unique identifier for the device sending the frame. The other options do not represent individual addresses: SOF is the Start of Frame delimiter, FCS is the Frame Check Sequence for error detection, and DA is the Destination Address, which may not be unique.