Explanation:
Externship is the training program or a training given to the employee temporarily to upgrade his skills.
There is a difference between "internship and externship".
Internship is given to a beginner. It's like on-the job training where they will be paid some minimum amount as salary.
Externship is for the person who is experienced. This would give practical experience. Here apply classroom lessons in the real word. We also get a chance to meet other professional.