The process of secretly capturing and analyzing network traffic, typically by malicious users, is known as Eavesdropping. It is done to intercept sensitive data transmitted over a network.
- Snooping can also refer to unauthorized access, but it is less precise compared to "eavesdropping."
- Intrusion refers to unauthorized access to a system or network, but it does not specifically refer to traffic analysis.
- Cookies are small pieces of data stored on the user’s device for web tracking and do not refer to traffic analysis.
Thus, the correct answer is "Eavesdropping."