sentences:  This in accordance with the end-to-end principle and a change from the previous protocols used on the early ARPANET.Since packet delivery across diverse networks is an inherently unreliable and failure-prone operation, the burden of providing reliability was placed with the end points of a communication path, i.e., the hosts, rather than on the network.This is one of the reasons of the resiliency of the Internet against individual link failures and its proven scalability.