What are two common approaches to analyzing and designing networks?

A (Bottom-Up Approach): Starts with the evaluation of current infrastructure (hardware, protocols, configurations), followed by design adjustments based on identified gaps.

C (Top-Down Approach): Starts from business and application requirements, translating them into technical design and network architecture.

Both approaches are widely used in network design methodology depending on business requirements and organizational maturity, directly referenced in CCDE v3.1 design models.

Why other options are incorrect:

B & D: These are not valid or recognized network design approaches.

E: Three-tier is a network architecture model, not a design approach.

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