Sun Microsystems Sun Fire X4200 - Manual (Page 178)

Glossary-6 Sun Fire X4100 and Sun Fire X4200 Servers System Management Guide • December 2005
domain A grouping of hosts that is identified by a name. The hosts usually belong to
the same Internet Protocol (IP) network address. The domain also refers to the
last part of a fully qualified domain name (FQDN) that identifies the company
or organization that owns the domain. For example, “sun.com” identifies Sun
Microsystems as the owner of the domain in the FQDN “docs.sun.com.”
domain name The unique name assigned to a system or group of systems on the Internet. The
host names of all the systems in the group have the same domain name suffix,
such as “sun.com.” Domain names are interpreted from right to left. For
example, “sun.com” is both the domain name of Sun Microsystems, and a
subdomain of the top-level “.com” domain.
Domain Name Server
(DNS) The server that typically manages host names in a domain. DNS servers
translate host names, such as “www.example.com,” into Internet Protocol (IP)
addresses, such as “030.120.000.168.”
Domain Name Service
(DNS) The data query service that searches domains until a specified host name is
found.
Domain Name System
(DNS) A distributed, name resolution system that enables computers to locate other
computers on a network or the Internet by domain name. The system
associates standard Internet Protocol (IP) addresses, such as “00.120.000.168,”
with host names, such as “www.sun.com.” Machines typically get this
information from a DNS server.
dual inline memory
module (DIMM) A circuit board that holds double the amount of surface-mount memory chips
that a single inline memory module (SIMM) holds. A DIMM has signal and
power pins on both sides of the board, whereas a SIMM has pins on only one
side of the board. A DIMM has a 168-pin connector and supports 64-bit data
transfer.
Dynamic Host
Configuration Protocol
(DHCP) A protocol that enables a DHCP server to assign Internet Protocol (IP)
addresses dynamically to systems on a Transmission Control Protocol/Internet
Protocol (TCP/IP) network.
dynamic random-access
memory (DRAM) A type of random-access memory (RAM) that stores information in integrated
circuits that contain capacitors. Because capacitors lose their charge over time,
DRAM must be periodically recharged.