A network designer wishes to provide a customer with the rationale for moving the enterprise from a flat network design to a hierarchical network design. Which of the following two features of the hierarchical network design would they best use to convince the customer that it is a better choice? Explain your answer!

• reduced cost for equipment and user training

• lower bandwidth requirements

• less required equipment to provide the same performance levels

• simpler deployment for additional switch equipment

• easier to provide redundant links to ensure higher availability