The Snowflake Cloud Services layer is a collection of services that coordinate activities across Snowflake, tying together all the different components to process user requests, from login to query dispatch1.
References = [COF-C02] SnowPro Core Certification Exam Study Guide, Snowflake Documentation1

The feature in Snowflake that allows a user to substitute a randomly generated identifier for sensitive data before loading it into Snowflake is known as External Tokenization. This process helps to secure sensitive data by ensuring that it is not exposed in its original form, thus preventing unauthorized access3.

https://docs.snowflake.com/en/user-guide/security-access-control-overview.html
"Security admin: Role that can manage any object grant globally, as well as create, monitor, and manage users and roles"