As part of my second year of study in TELECOM LILLE, I had to do my first technical internship in network and telecommunications. The principal aim of this internship is to acquire a practical knowledge of some concepts introduced during theorical lectures. I chose to do it in Spain in order to discover another culture and spirit that are foreign for me. The EPSC for Escola Politecnica Superior de Castelldefls was a good placement for this first technical internship. As an engineering school, it offers all the best conditions to reach the targets fixed by my school. I started my internship in the 10th of may and ended it two months later on the 10th of July. So during these two months of internship, I had to comply with the EPSC rules and carry out a study about the SCTP protocol.