Sand boxing
The Java security model, which provides control over how Java applets can interact with a computer system.

Script
A program consisting of a set of instructions to an application or utility program.

Script let
A reusable Web page in which Dynamic HTML script has been written according to certain conventions.

SCSI
Small computer standard interface. An I/O bus designed as a method for connecting several classes of peripherals to a host system without requiring modifications to generic hardware and software.

SDK
Software Development Kit. A kit that programmers can use to create new applications.

Secure password authentication (SPA)
Any authentication in which the actual password is not sent over the network.

Secure Sockets Layer (SSL)
A protocol that supplies secure data communication through data encryption and decryption. SSL enables communications privacy over networks through a combination of public key cryptography and bulk data encryption.

Security zone
In Internet Explorer, a segment of the Internet or intranet assigned a particular level of security.

Serial Line Internet Protocol (SLIP)
A data link protocol that allows transmission of IP data packets over dial-up telephone connections, typically used by UNIX remote access servers.

Server
For a LAN, a computer running administrative software that controls access to all or part of the network and its resources. A computer acting as a server makes resources available to computers acting as workstations on the network. See client.

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.

Service Advertising Protocol (SAP)
The Novell NetWare broadcasting protocol.

Set-up script
A text file that contains predefined settings for all the options specified during setup.

Share-level security
A security methodology in which passwords are used to restrict access to shared resources on a peer server. The only security level available on peer-to-peer networks.

Simple Mail Transfer Protocol (SMTP)
A protocol used for exchanging mail on the Internet.

Simple Network Management Protocol (SNMP)
The Internet's standard for remote monitoring and management of hosts, routers, and other nodes and devices on a network. A TCP/IP-derived protocol governing network management and monitoring network devices.

Smart card
A small electronic device, approximately the size of a credit card, that contains an embedded integrated circuit. Used for such tasks as storing medical records, storing digital cash, and generating network IDs.

SNMP
See Simple Network Management Protocol.

Socket
A software object used by a client to connect to a server; basic components include the port number and the network address of the local host.

SOCKS
A protocol for traversing firewalls in a secure and controlled manner, made publicly available by the Internet Engineering Task Force.

Source routing
A method of routing data across bridges.

SPI
Service provider interface, a single, well-defined set of functions used by Windows 98 to request network services.

Step captures
A process in which a user captures digital-video data one frame at a time.

Still Image Architecture (STI)
A WDM architecture for still image devices. A still image minidriver provides support for still image devices, such as scanners and cameras.

Stream
A continuous series of bits, bytes, or other small, structurally uniform units.

Streaming architecture
A model for interconnection of stream-processing components, in which applications dynamically load data as they output it. Dynamic loading means data can be broadcast continuously. See WDM streaming.

Streaming data
Data continuously broadcast to an application. For example, a broadcast client's user might subscribe to continuously broadcast sports scores.

Subnet mask
A 32-bit value that allows the recipient of IP packets to distinguish the network ID portion of the IP address from the host ID.

Subscription
Stored information describing how a user will have access to an Active Channel Web site, including frequency and method of access.

Swap file
A hidden file on the hard drive that Windows uses to hold parts of programs and data files that do not fit in memory.

System policies
Settings that allow an administrator to override local registry values for user or computer settings.

System Policy Editor
A tool with which one can change many common registry settings for an individual computer.