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200-301 · Question #1497
200-301 Question #1497: Real Exam Question with Answer & Explanation
The correct answer is B: performs a lookup to learn the destination interface. Frame switching involves a Layer 2 switch using its MAC address table to efficiently forward frames to the correct destination interface.
Submitted by sofia.br· Mar 5, 2026Network Access
Question
What is a characteristic of frame switching?
Options
- Arewrites the source and destination MAC address
- Bperforms a lookup to learn the destination interface
- Csends a retransmission request when a new frame is received
- Dinspects and drops frames from unknown destinations
Explanation
Frame switching involves a Layer 2 switch using its MAC address table to efficiently forward frames to the correct destination interface.
Common mistakes.
- A. Frame switching at Layer 2 does not rewrite source and destination MAC addresses; that function is typically associated with Layer 3 routing or specialized network address translation.
- C. Switches do not send retransmission requests; retransmissions are handled by higher-layer protocols (e.g., TCP) if data is lost.
- D. A switch typically forwards frames with unknown destination MAC addresses out all ports within the same VLAN (flooding), rather than dropping them, to try and find the destination.
Concept tested. Layer 2 switch frame forwarding mechanism
Topics
#Layer 2 switching#Switch forwarding
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