The Full Form of EFMA is Ethernet in the First Mile Alliance.

Ethernet in the first mile (EFM) refers to using one of the Ethernet family of computer network protocols between a telecommunications company and a customer’s premises. From the customer’s point of view it is their first mile, although from the access network’s point of view it is known as the last mile. A working group of the Institute of Electrical and Electronics Engineers (IEEE) produced the standards known as IEEE 802.3ah-2004, which were later included in the overall standard IEEE 802.3-2008.

Although it is often used for businesses, it can also be known as Ethernet to the home (ETTH). One family of standards known as Ethernet passive optical network (EPON)) uses a passive optical network.