You should have received an email from the CRI of Rennes 1. A reply from you meanning that you accept the regulations of Rennes 1. Then, you will receive a code to use internet on the Campus during the time of the conference (either from your personnal laptop or free access computers of Rennes1).

If you do NOT answer before, you will NOT have the opportunity to connect to the internet on the Campus (even with your personnal laptop).