Which center is typically aligned under the base communications squadron, provides Tier 3 (local level) on-site, and implements technical and physical network changes?

The Network Control Center (NCC) is the correct choice because it is specifically designed to provide Tier 3 support at the local level. This encompasses on-site assistance and the implementation of technical and physical changes to the network. The NCC plays a crucial role in managing and overseeing the operational aspects of the network, ensuring that it runs smoothly and efficiently while addressing any issues that arise.

While other centers have important functions, they do not primarily focus on local-level on-site support in the same manner as the NCC. The Area Processing Center (APC), for instance, typically manages data processing tasks and does not handle on-site technical support directly. The Air Force Network Operations Center (AFNOC) operates at a higher level, dealing with broader network operations and oversight rather than localized issues. The Integrated Network Operations and Security Center (I-NOSC) focuses on integrating network operations and security at a more strategic level but does not provide the hands-on local support that the NCC is tasked with.

Therefore, the NCC's role encompasses the essential responsibilities of providing local technical support and managing network changes, making it the appropriate choice in this context.