MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

Glossary G-39
security Making computers and the data stored on them safe from harm or unauthorized
access.
Security Center A feature of Windows XP Professional with Service Pack 2 that provides
at-a-glance security status for a computer, including information on Windows
Firewall, Automatic Updates, and antivirus software.
Security Identifier (SID) A data structure of variable length that uniquely identifies
user, group, service, and computer accounts within an enterprise. Every account is
issued an SID when the account is first created. Access control mechanisms in
Windows XP Professional and Windows 2000 identify security principals by SID
rather than by name.
security log Records security events, such as valid and invalid logon attempts, and
events relating to creating, opening, or deleting files or other objects.
Security options Policies that allow you to control various security settings in Windows
XP Professional.
security templates Preconfigured combinations of security settings that you can
apply to computers or customize to suit your needs.
security zones Categories of Web sites that Internet Explorer uses to allow or block
access to particular types of activities. Zones include Internet, Local Intranet,
Trusted Sites, and Restricted Sites.
segment The length of cable on a network between two terminators. A segment can
also refer to messages that have been broken up into smaller units by the protocol
driver.
separator page A file that contains print device commands. Separator pages identify
and separate print jobs and can also be used to switch a printer to a different print
mode.
serial transmission One-way data transfer. The data travels on a network cable
with one bit following another.
server A computer that provides shared resources to network users. See also client.
server-based network A network in which resource security and most other network
functions are provided by dedicated servers. Server-based networks have
become the standard model for networks serving more than 10 users. See also
peer-to-peer network.
Server Message Block (SMB) The protocol developed by Microsoft, Intel, and IBM
that defines a series of commands used to pass information between network
computers. The redirector packages SMB requests into a network control block
(NCB) structure that can be sent over the network to a remote device. The network
provider listens for SMB messages destined for it and removes the data portion
of the SMB request so that it can be processed by a local device.