Which method of wiretapping does not require a physical connection to a line?

Inductive coupling is a method of wiretapping that does not require a physical connection to the wire. Instead, it uses electromagnetic fields to intercept signals from a nearby cable, allowing eavesdroppers to monitor conversations or data transmissions without direct contact.

ASIS Certified Protection Professional (CPP®) References:

Technical Security Countermeasures: CPP materials discuss inductive coupling as a non-invasive method of signal interception.

Communications Security (COMSEC): Preventing unauthorized interception through electromagnetic shielding is emphasized in CPP security guidelines.