How can employees maintain their composure and professionalism when faced with difficult customers who are being rude or aggressive?

Employees can maintain their composure and professionalism when dealing with difficult customers by remaining calm and composed, actively listening to the customer's concerns, and responding with empathy and understanding. It is important for employees to not take the customer's behavior personally and to focus on finding a solution to the issue at hand. Setting clear boundaries and seeking assistance from a supervisor if necessary can also help in managing interactions with rude or aggressive customers.