TeRABIT is a research infrastructure funded through NRRP, Next Generation EU funds. The objective is to propose a development in the models of usage and access to High Performance Computing (HPC), offering cutting-edge solutions for the Italian scientific community and network connections in the order of Terabits per second. The project integrates and enhances three major national strategic research infrastructures: the national research network GARR-T, the HPC node PRACE-Italy at OGS, located at CINECA, and the distributed cloud services system HPC-BD-AI of INFN.