A social engineer intercepted an end$-$user's phone call to an internet service provider $($ISP$)$ about a home internet outage.

Pretending to be the caller reporting the outage, the attacker immediately contacted the ISP to cancel the service call, dressed up as an internet tech, and then proceeded to enter the end$-$user's home with permission.

What social engineering attack did the ISP and end$-$user fall victim to$?$

answer

Tailgating

Impersonation

Hoax

Pharming