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An internal security audit determines that Telnet is currently being used within the environment to manage network switches. Which of the following tools should be utilized to identify credentials in plaintext that are used to log in to these devices?
Correct Answer: B
A network traffic analyzer (also known as a packet sniffer) is the best tool to identify credentials being transmitted in plaintext, such as those used in Telnet sessions. Since Telnet transmits data without encryption, a network traffic analyzer can capture the traffic between the client and the network switches, revealing sensitive information, including login credentials, in clear text. This tool helps identify insecure protocols and enables remediation by switching to encrypted alternatives like SSH.