Application & consensus layer funding updates –
With the arrival of the beacon chain in 2020, Ethereum today supports two types of clients: those focusing on the application-layer (often referred to as eth1) and those powering the proof-of-stake consensus layer (aka eth2). As those running validators are well aware (since they run both client types), each serves…

Source and More information: Supporting Ethereum’s Client Ecosystem

Author: Ethereum.org