Which of the following is NOT considered a common shared service?

Shared services are typically components that support multiple systems or applications within an organization, centralized to improve efficiency and reduce costs. Common shared services often include tools and protocols that facilitate communication, authentication, and time synchronization across diverse systems.

Active Directory is a widely used directory service for managing identities and access permissions across a network, making it a fundamental shared service. NTP serves the important function of synchronizing the clocks of computer systems across a network, which is critical for maintaining log accuracy and system operations, thus qualifying as a shared service. SMTP is the standard protocol for sending emails across the internet, and it is also used widely across different applications for communication purposes, classifying it as a shared service as well.

In contrast, projection and content management systems typically serve more specialized functions, such as managing digital content and presentations for specific business needs. They are less about standardized fundamental services used across various operations and more about providing solutions tailored to specific departmental or project requirements. This distinguishes them from the other protocols and services, which are essential and universally applicable across organizational IT infrastructures.