Final answer:
The unauthorized packet-capturing tool on the network is attacking the category of Confidentiality in the CIA triad.
Step-by-step explanation:
The category of the CIA (Confidentiality, Integrity, and Availability) triad that is being attacked in this scenario is Confidentiality.
The unauthorized packet-capturing tool on the network is a security threat that can intercept and capture sensitive information, compromising the confidentiality of data transmitted over the network. This tool allows an attacker to eavesdrop on network traffic and potentially access confidential information.
By using this packet-capturing tool, an unauthorized individual can gain access to encrypted data, login credentials, financial information, or any other confidential data that is being transmitted across the network.