The term "spoofing" in network security refers to malicious activities where an attacker impersonates another user or device to gain unauthorized access or disrupt services. Examples include IP spoofing, whereby a malicious actor disguises their IP address to mislead systems about their actual identity. This can lead to data breaches, as well as denial of service attacks. Spoofing undermines the trust within electronic communications, making it crucial for organizations to implement robust authentication and verification measures to safeguard sensitive information and maintain network integrity.