The Data Availability Layer plays a crucial role in modular architecture, becoming one of the most popular fields in 2024. Ethereum's Data Availability (DA) became a hot topic, triggering broad discussions about projects such as Celestia, EigenLayer, Avail, and NearDA. This article will delve into the technical architecture, consensus mechanisms, and other aspects of key participants Celestia and EigenDA to reveal the competitive landscape of the DA track.