The goal is to optimize bandwidth, increase speed, and maintain threat visibility in a low-bandwidth satellite office. Local caching stores frequently accessed data locally, reducing bandwidth usage by minimizing repeated requests to external or internal resources. It speeds up access and doesn't inherently reduce security visibility if paired with monitoring tools.
Option A: Distributed connection allocation might balance traffic but doesn't directly reduce bandwidth usage or speed up access.
Option B: Local caching is ideal-reduces bandwidth, improves performance, and maintains visibility with proper security controls.
Option C: A CDN is great for external content delivery but less relevant for internal resources and doesn't inherently address threat visibility.
Option D: SD-WAN improves WAN performance, but "vertical heterogeneity" is vague and not a standard term; it's less tailored to this scenario than caching.