ticket, Kerberos A temporary credential that proves a Kerberos client’s identity to a service.
Transmission Control Protocol See TCP.
UDP User Datagram Protocol. A communications method that uses the Internet Protocol (IP) to send a data unit (called a datagram) from one computer to another on a network. Network applications that have very small data units to exchange may use UDP rather than TCP.
UID User ID. A number that uniquely identifies a user within a file system. Mac OS X computers use the UID to keep track of a user’s folder and file ownership.
URL Uniform Resource Locator. The address of a computer, file, or resource that can be accessed on a local network or the Internet. The URL is made up of the name of the protocol needed to access the resource, a domain name that identifies a specific computer on the Internet, and a hierarchical description of a file location on the computer.
USB Universal Serial Bus. A standard for communicating between a computer and external peripherals using an inexpensive
User Datagram Protocol See UDP.
user ID See UID.
user name The long name for a user, sometimes referred to as the user’s real name.
See also short name.
volume A mountable allocation of storage that behaves, from the client’s perspective, like a local hard disk, hard disk partition, or network volume. In Xsan, a volume consists of one or more storage pools. See also logical disk.
WebDAV
WINS Windows Internet Naming Service. A name resolution service used by Windows computers to match client names with IP addresses. A WINS server can be located on the local network or externally on the Internet.
Glossary
39