The term THD is an acronym used to designate Very High Speed ​​Broadband. In France, ARCEP, the regulatory authority for electronic communications, classifies THD into two categories: THD with a speed greater than 30 Mbps and THD with a minimum speed of 100 Mbps. Technologies associated with THD include fixed 4G, FTTH (Fiber to the Home), which corresponds to an end-to-end fiber optic connection, FTTLA (Fiber To The Last Amplifier), which consists of an optical fiber terminating in a coaxial amplifier, and VDSL2, which relies on the copper network.