This scenario illustrates physical impersonation, a social engineering tactic discussed in CEH v13 Social Engineering. The attacker exploits trust in appearance and role assumption, dressing as a network technician to gain access without challenge.

Unlike tailgating (which involves following someone), this attack relies on assumed authority and familiarity. CEH v13 categorizes this under impersonation attacks, where attackers pose as employees, contractors, or vendors.

Other options describe different social engineering vectors:

A: Phone-based pretexting

B: Dumpster diving

C: Vishing

Physical impersonation is particularly dangerous because it bypasses technical controls entirely. Option D best matches the scenario.