Which network design principle focuses on the capability of on-demand seamless network expansion in a switched network?

Question:
Which network design principle focuses on the capability of on-demand seamless network expansion in a switched network?

• flexibility
• modularity
• resiliency
• hierarchical

Explanation: There are several sound network design principles that should be used when building design guidelines for a borderless switched network:
Hierarchical – Defines the role of each device at every tier, simplifies deployment, operation, and management, and reduces fault domains at every tier
Modularity – Allows seamless network expansion and integrated service enablement on an on-demand basis
Resiliency – Satisfies user expectations for keeping the network always on
Flexibility – Allows intelligent traffic load sharing by using multiple network resources simultaneously

Exam with this question: CCNA 2 (v5.0.3 + v6.0) Practice Final Exam Answers