What is a characteristic of the two-tier spine-leaf topology of the Cisco ACI fabric architecture?​

Question:
What is a characteristic of the two-tier spine-leaf topology of the Cisco ACI fabric architecture?​

• The spine and leaf switches are always linked through core switches.
• The spine switches attach to the leaf switches and attach to each other for redundancy.
• The leaf switches always attach to the spines and they are interlinked through a trunk line.
• The leaf switches always attach to the spines, but they never attach to each other.

Exam with this question: CCNA 3 v7.0 Final Exam Answers