Glossary
Dell Model TL24iSCSIxSAS 1Gb iSCSI to SAS User’s Guide Rev.C Page 63
LED - Light-emitting diode.
LUN - Logical Unit Number - A LUN is a number which identifies a sub-element within a SCSI target device.
This is normally used to refer to the device itself.
NTP - Network Time Protocol is a protocol for synchronizing the clocks of computer systems over the IP
network. NTP as defined in IETF RFC 1305 is useful for synchronizing the internal clock of the computers to
a common time source.
RJ45 - A commonly used connector for networks.
Serial Attached SCSI (SAS) - SAS is a performance improvement over traditional SCSI because SAS
enables multiple devices (up to 128) of different sizes and types to be connected simultaneously with thinner
and longer cables; its full-duplex signal transmission supports 3.0 Gb/s. In addition, SAS drives can be hot-
plugged.
Subnet-address - the subnet-address is an extension of the IP-address allowing a single IP-network
address to be used for multiple physical networks. Gateways and hosts using subnet-addressing divide the
host portion of the address into a subnet-identifier and host portion.
Switch - a network communications device that routes packets (messages or fragments of messages)
between nodes across virtual circuits.
TCP/IP - Transmission Control Protocol/Internet Protocol. TCP is a protocol that insures packets are
delivered in order, error free.
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