How do you become a commercial RE agent?

[Dan Bui]

I am currently taking courses to become an RE agent. It daunts on me that may be I should get into commercial RE because the world already has too many residential realtors. Is anybody in here a commercial RE agent or broker? What does it take to become one? I assume that it requires extra certification to practice in this field since it's so different from residential market. Thanks for any input.