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In this paper, the authors introduce Tapa, a network architecture that accommodates diversity at the network edge: different access networks, heterogeneous edge devices, and rich applications and network services. The core idea underlying Tapa is to use network segments, rather than IP links, as the basis on top of which end-to-end transport semantics are implemented. A segment spans a part of the end-to-end path that can be considered homogeneous (e.g., wired Internet or an access network) - network specific functions and optimizations, like congestion control, are implemented within a segment, allowing use of customized solutions. On top of segments is the transfer layer, which manages end-to-end data transfer over multiple segments, supporting better source and path selection mechanisms than IP.
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