DO NOT design your network like this!! // FREE CCNA // EP 6

Summary by Krater

An explanation of network architecture design models, comparing two-tier and three-tier campus topologies and explaining the roles of access, distribution, and core layers.

From the video

Answers: What is the difference between a two-tier and three-tier network architecture?

• network architecture
• two-tier network design
• three-tier network design
• access layer
• distribution layer
• core layer
• collapsed core architecture

What it concludes

• A two-tier network design creates single points of failure where a single link or switch failure can take down dependent devices.
• A three-tier architecture adds a dedicated core layer for the network backbone, reducing scaling complexity and single points of failure across large campus environments.
• Higher-tier switches such as Cisco Catalyst 6500 and 9600 series provide massive modular bandwidth and redundancy required for enterprise distribution and core layers.