N10-005 Question #753: Real Exam Question with Answer & Explanation

The correct answer is B: Port Mirroring. Port Mirroring (B) - also known as SPAN (Switched Port Analyzer) - copies traffic from one or more source ports and sends it to a designated mirror/monitor port where the packet sniffer is connected. Without this, a switch only forwards traffic to its intended destination port, s

Question

Which of the following must a technician enable on a switch in order to be able to view all of the packets traversing a switch using a packet sniffer?

Options

ASTP
BPort Mirroring
CVLANs
DPoE

Explanation

Port Mirroring (B) - also known as SPAN (Switched Port Analyzer) - copies traffic from one or more source ports and sends it to a designated mirror/monitor port where the packet sniffer is connected. Without this, a switch only forwards traffic to its intended destination port, so a sniffer would only see its own traffic. STP (A) is Spanning Tree Protocol, used to prevent network loops. VLANs (C) segment network traffic but don't expose it for capture. PoE (D) provides power over Ethernet and is unrelated to packet capture.

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