What is the maximum number of service projects allowed in a shared VPC?

The maximum number of service projects allowed in a shared VPC is 100. This strengthens the management of resources within Google Cloud by enabling a centralized network model where resources can be shared across multiple projects. Service projects can be integrated into a shared VPC to leverage the host project's networking capabilities efficiently.

This limitation ensures that administrative overhead and network complexity are kept manageable, allowing organizations to maintain performance and clarity in their network architecture. A shared VPC setup can significantly enhance security and simplify the networking aspect across various projects while adhering to the defined quota for optimal performance and organization.