Q. What guardians can I use with Standard SKU of Windows Server 2016?
A. There are two types of guardian; local guardians and Host Guardian Services. Local guardians are essentially certificates on a local machine that provide no assurance of the host health of security while Host Guardian Service provides attestation of the host health and is isolated from the fabric and fabric administrators. Hyper-V hosts not running Datacenter can only use local guardians while Datacenter hosts can use local guardians and Host Guardian Service.