Which statement is true regarding Layer 3 underlay fabric networks?

Which statement is true regarding Layer 3 underlay fabric networks?
A . Layer 3 underlay fabric networks can only be used across public networks
B. Layer 3 underlay fabric networks rely on IPsec tunnels to interconnect tenants
C. Layer 3 underlay fabric networks rely on Layer 2 loop prevention protocols
D. Layer 3 underlay fabric networks are more scalable than Layer 2 fabric underlay networks

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Answer: D