How many layers are recommended in the hierarchical network design?
- 3
- 1
- 2
- 4
Explanation: The recommended Cisco hierarchical network design is a three-tier architecture consisting of the access, distribution, and core layers. This modular framework simplifies the tasks required for internetworking by allowing each layer to focus on specific functions:
- Access Layer: Used to grant user access to network devices and end systems like PCs and printers.
- Distribution Layer: Aggregates wiring closets, segments workgroups, and acts as a service and control boundary where routing, security policies, and QoS are implemented.
- Core Layer: Serves as the high-speed backbone for the campus, designed to switch packets as fast as possible with high availability.
While some smaller networks may use a "collapsed core" design with only two physical tiers, the fundamental hierarchical model is defined by these three functional layers.
Related exam: Modules 1 – 7: Checkpoint Exam: Network Switching Answers (CCNP ENCOR v9)
