Which statement is the most accurate regarding IPsec VPN design for an Enterprise Campus environment?

Which statement is the most accurate regarding IPsec VPN design for an Enterprise Campus environment?
A . VPN device IP addressing must align with the existing Campus addressing scheme.
B . The choice of a hub-and-spoke or meshed topology ultimately depends on the number of remotes.
C . Sizing and selection of the IPsec VPN headend devices is most affected by the throughput bandwidth requirements for the remote offices and home worker
D . Scaling considerations such as headend configuration, routing protocol choice, and topology have the broadest impact on the design.

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Answer: D