S

schema modification policy

Administrative policy that defines who will authorize a schema change, who will make the change, and when and where the change will be made.

scope options

DHCP configuration options that are applied to all systems within an IP subnet that receive IP configurations from the DHCP server.

secondary zones

DNS zone type that receives its zone data through a zone transfer from a master DNS server. This zone type is read-only ”the records can only be changed through a zone transfer.

security identifier (SID)

Unique descriptor used to identify users, groups, and computers.

server options

DHCP configuration options that are applied globally to all users who receive IP configurations from the DHCP server.

service account

User account that is used to allow a service or software to operate on a system.

service administrators

Administrative staff who are responsible for maintaining the directory service and the services that the directory service relies upon.

Service Level Agreement (SLA)

Contract that specifies the requirements for a system s responsiveness and the responsibilities of the administrative entity of the system.

shortcut trusts

One-way or two-way transitive trust relationships that are created between two domains within the same Active Directory forest.

SID

See security identifier (SID) .

SID filtering

An option on trust relationships that blocks the SIDHistory attribute from being used in a remote domain.

SIDHistory

Attribute of a user account when a domain is in Windows 2000 native mode or higher that allows previous SIDs to be associated with the user account.

single forest design

Active Directory design option that uses one forest for the organization to ease administrative costs.

site link bridge

A logical path between two sites when you are using multiple site links.

site link

The connector that allows Active Directory replication to pass between two sites. The site link is based on an interval within a schedule that an administrator controls.

sites

A collection of well-connected IP subnets.

snap-ins

Software that can be added to the MMC in order to give administrators the ability to control services and software.

software reliance

Software that must be in place for applications or services to function.

software requirements

The system options that will need to be met for software to function on a system.

stakeholders

Anyone who is responsible for, or needs access to, a resource.

Store Passwords Using Reversible Encryption setting

Option that is required when you are using digest authentication so that the user s password can be correctly identified.

strong passwords

Passwords that contain at least three character types, (i.e., uppercase, lowercase, numerical, and special characters ), and are not common words or reiterations of the same password (i.e., P@ssw0rd1, P@ssw0rd2, and so on). See complex passwords .

stub zones

DNS zone type that contains the name server (NS) and host (A) records for the name servers that are authoritative for the zone. These records are dynamically updated so that the administrator does not have to update them manually.