GM Blobs! Welcome back to the second instalment of our series of educative blog posts, related on EIP4844, Dencun and Ethereum’s scaling efforts!In this edition, we’ll be learning about how Layer 2 (L2) networks work in the pre-Dencun era, why they’re cheaper than Ethereum and how they guarantee correctness and safety for end users!IntroductionWhat is a L1?Layer 1 (L1) is typically used to identify a blockchain that doesn’t depend on any external network: it can carry out all the functions ne...