Yeskendir (Alex)’s Answer
While I have not majored in film and thus may not be the ideal respondent to this question, I have certainly networked in college in my own area of study: finance and accounting. Even though my major is different from yours, the concept of networking remains the same.
My advice would be to establish good connections with people in your college class majoring in digital media and film. You will be surprised by how these people will be strong points of contact if you ever start your own business.
Another opportunity to expand your network would be to become a member of a student club that focuses on film, technology, and digital media. It will present you with plenty opportunity to establish connections with like-minded individuals. They too can be a great source of information for finding other opportunities to meet other talented people in the industry.
Getting an internship in the area of interest, and networking with professionals there will also be a good way to build your network.
Finally, just asking people who you have met that share same interests with you about how they went about networking will further help you find the right people.