During a red team assessment at Alpine Manufacturing Corp., network security consultant Marcus Lee is instructed to evaluate the security of internal communications within their switched LAN environment. Without altering any switch configurations, Marcus manages to intercept credentials being transmitted between a payroll administrator’s workstation and the backend authentication server. He subtly reroutes the communication path through his testing machine, though no proxy or VPN was involved. Analysis shows the redirection was achieved by injecting crafted messages that silently altered how the two hosts identified each other on the local network.
Which sniffing technique did Marcus most likely use?
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