John works as an IT Technician for PassGuide Inc. One morning, John receives an e-mail from the company's Manager asking him to provide his logon ID and password, but the company policy restricts user

Social engineering manipulates individuals into disclosing confidential information by exploiting trust, authority, or urgency without any technical exploit. In this scenario, the attacker impersonates a manager via email to trick John into revealing his logon credentials, which is a textbook phishing or pretexting social engineering technique.

A Denial of Service attack overwhelms a system with traffic to make it unavailable - it does not involve tricking users into revealing credentials.

A Trojan horse is malware disguised as legitimate software that executes malicious code on a victim's machine, which is not what is described here.

A replay attack involves capturing and retransmitting valid network authentication tokens or packets, not soliciting credentials through deceptive communication.