Microsoft Windows Server 2003 Deployment Kit—Deploying Microsoft Internet Information Services (IIS) 6.0 [Electronic resources] نسخه متنی

R

RAID

See Redundant Array of Independent Disks (RAID).

random access memory (RAM)

Memory that can be read from or written to by a computer or other devices. Information stored in RAM is lost when the computer is turned off.

realm

A term that is sometimes used for domain, in this case to refer to user domains that are established for security reasons, not Internet domains. For password-protected files, the name of the protected resource or area on the server. If the user tries to access the protected resource while browsing, the name of the realm usually appears in the dialog box that asks for a user name and password.

redirection

Redirection can be used to automatically send a user from an outdated Uniform Resource Locator (URL) to a new URL.

Redundant Array of Independent Disks (RAID)

A data storage method in which data, along with information used for error correction, such as parity bits, is distributed among two or more hard disk drives to improve performance and reliability. The hard disk array is governed by array management software and a disk controller, which handles the error correction. RAID is generally used on network servers. Several defined levels of RAID offer differing trade-offs among access speed, reliability, and cost. Windows includes three of the RAID levels: Level 0, Level 1, and Level 5.

registry

A database repository for information about a computer's configuration. The registry contains information that Windows continually references during operation, such as:

Profiles for each user

The programs installed on the computer and the types of documents that each can create Property settings for folders and program icons What hardware exists on the system

Which ports are being used

The registry is organized hierarchically as a tree, and it is made up of keys and their subkeys, hives, and entries.

See also key.

See also subkey.

relative path

A universal naming convention (UNC) directory path with placeholders, or wildcards, at some levels. Also, the physical path that corresponds to a Uniform Resource Locator (URL).

See also physical path.

remote procedure call (RPC)

In programming, a call by one program to a second program on a remote system. The second program usually performs a task and returns the results of that task to the first program.

remotely administered server

A server that you can administer by using a different computer. You typically access this type of server by using a network connection. A remotely administered server can have a local keyboard, mouse, or video card and monitor. If it does not have these peripherals attached, it is also known as a headless server. Such servers are often housed in a physically secure location.

See also server.

replication

The copying from one server node to another of either content or the configuration metabase, or both. This copying can be done either manually or automatically by using replication software. Replication is a necessary function of clustering that ensures fault tolerance.

See also fault tolerance.

Request for Comments (RFC)

The document series, begun in 1969, that describes the Internet suite of protocols and related experiments. Not all (in fact, very few) RFCs describe Internet standards, but all Internet standards are written up as RFCs. The RFC series of documents is unusual in that the proposed protocols are forwarded by the Internet research and development community, acting on its own behalf, as opposed to the formally reviewed and standardized protocols that are promoted by organizations such as the American National Standards Institute (ANSI).

router

An intermediary device on a communications network that expedites message delivery. On a single network linking many computers through a mesh of possible connections, a router receives transmitted messages and forwards them to their correct destinations over the most efficient available route. On an interconnected set of local area networks (LANs) using the same communications protocols, a router serves the somewhat different function of acting as a link between LANs, enabling messages to be sent from one LAN to another.

RPC

See remote procedure call (RPC).

RSA

A public-key encryption standard for Internet security. This acronym derives from the last names of the inventors of the technology: Rivest, Shamir, and Adleman.