The Connected World Technologies Master has two internships. One lasting six weeks, the other ten weeks. If there are internships within the certificate depends on your specific Master-track.
Preferably, you have one internship abroad if you haven't had any previous international experience. If you have, you can take both internships within the TU/e. The TU/e will help you find an internship at companies of universities in Europe, the United States of America, or even Japan.