Functionality Split Network provides best-effort delivery End-systems implement richer functions Reliability k In-order delivery Demultiplexing Message boundaries k connection abstraction Congestion control 2021/2/8 4Functionality Split  Network provides best-effort delivery  End-systems implement richer functions  Reliability  In-order delivery  Demultiplexing  Message boundaries  Connection abstraction  Congestion control  … 2021/2/8 4