Generally, a genealogical DNA test might use either autosomal STRs or autosomal SNPs. (STR's are Short Tandem Repeats; SNPs are single-nucleotide polymorphisms.) However, testing companies do not currently offer autosomal STRs tests that use enough STR markers for genealogy.
The schema is the Active Directory component that defines all the objects and attributes that the directory service uses to store data. The physical structure of the schema consists of the object definitions. The schema itself is stored in the directory.
The protocols that are used by Active Directory searches â and their relationship to the International Organization for Standardization (ISO) Open Systems Interconnection (OSI) 7-layered network protocol model â are shown in the following figure.o understand how Active Directory searches work, it is important to understand the LDAP standard. Active Directory structure is based on LDAP v3 requirements, which are defined in a series of Internet Engineering Task Force (IETF) RFCs, as summarized in RFC 3377.