Correct Answer. C. A spoofing attack mimicking the trusted system Spoofing attacks often involve the creation of traffic that appears to come from trusted, legitimate sources to deceive systems or individuals into granting access or revealing confidential information.
Option A is incorrect because network congestion typically does not mimic specific trusted systems.
Option B is incorrect as internal updates would be documented and known to administrators, and would not mimic external systems.
Option D is incorrect because new legitimate traffic sources would likely be communicated to network administrators beforehand and would not typically mimic existing trusted systems.