CCNA: Cisco Certified Network Associate — Question 1080

What is a characteristic of frame switching?

Answer options

• A. rewrites the source and destination MAC address
• B. performs a lookup to learn the destination interface
• C. sends a retransmission request when a new frame is received
• D. inspects and drops frames from unknown destinations

Correct answer: B

Explanation

The correct answer is B because frame switching involves looking up the destination interface to forward the frame correctly. Option A is incorrect as frame switching does not alter MAC addresses. Option C is not relevant to frame switching since it does not send retransmission requests upon receiving frames. Option D is also incorrect because while frame switching may drop unknown frames, this is not a defining characteristic of the process.