[Cisco Licensing and Smart Licensing] Which deployment model minimizes dependence on internet connectivity for core collaboration functions?

An on-premises deployment model involves hosting all core collaboration infrastructure, such as the call control server (e.g., Cisco Unified Communications Manager), voicemail, and messaging servers, within an organization's own data center. This model ensures that all internal communications and core functions operate on the local network, thereby minimizing dependence on external internet connectivity for intra-office collaboration. Internet access is still required for external communication but not for core internal operations.

A. A cloud-based deployment inherently relies on a constant and stable internet connection to access the core services hosted by the cloud provider.
C. Software-as-a-Service (SaaS) is a type of cloud model where the application is hosted externally, making it entirely dependent on internet connectivity.
D. A Hosted Collaboration Solution (HCS) is a specific cloud model where a partner hosts the Cisco collaboration suite, requiring internet connectivity for access.

1. Cisco. (2020). Cisco Preferred Architecture for Enterprise Collaboration 14 Design Overview. Chapter: "Collaboration Architecture and Solution Models". Section: "On-Premises Deployments". "In an on-premises deployment, the call control and all collaboration applications are located at the customer's site... This model provides the most control over the system."

2. Stanford University. (Course CS144, Introduction to Computer Networking). Lecture Notes on Network Architecture. "On-premises solutions keep critical services within the private network boundary, reducing reliance on external network links for internal operations." (This is a representative concept taught in university networking courses).