Overland Storage NEO 200S User Manual page 165

NEO 200s/400s User Guide
Terminator
A terminator refers to the electrical connection at each end of a SCSI bus. The terminator is
composed of a set of resisters, or possibly other components. The function of a terminator is
to provide a pull-up for open collector drivers on the bus, and also impedance matching to
prevent signal reflections at the ends of the cable. SCSI buses require that a terminator be
placed on the SCSI connector on the last SCSI peripheral. Data errors may occur in a SCSI
bus that is not terminated.
TOE (TCP Offload Engine)
Short for TCP Offload Engine. TOE is a technology used in network interface cards to
offload processing of the entire TCP/IP stack to the network controller. It is primarily used
with high-speed network interfaces, such as gigabit Ethernet and 10 gigabit Ethernet,
where processing overhead of the network stack becomes significant.
Topology
Logical layout of the parts of a computer system or network and their interconnections.
There are two types of topology: physical and logical. The physical topology of a network
refers to the configuration of cables, computers, and other peripherals. Logical topology is
the method used to pass the information between workstations.
Trap
A signal from a device informing an SNMP management program that an event has
occurred.
U
A standard unit of measure for designating the height in computer enclosures and rack
cabinets. One U equals 1.75 inches. For example, a 3U server chassis is 5.25 inches high.
UDP
Short for User Datagram Protocol. A communications protocol for sending messages
between computers in a network that uses the Internet Protocol (IP). UDP is an alternative
to the Transmission Control Protocol but, unlike TCP, does not guarantee reliability or
ordering of data packets.
UNC
Short for Universal Naming Convention. In a network, a way to identify a shared file in a
computer without having to specify (or know) the storage device it is on. In the Windows
OS, the UNC name format is as follows:
\\server_name\share_name\path\file_name
UPS
Short for Uninterruptible Power Supply. A device that allows a computer to keep running
for a short time when the primary power source is lost. It also provides protection from
power surges. A UPS device contains a battery that starts when the device senses a loss of
power from the primary source.
URL
Short for Uniform Resource Locator. A Web address.
10400367-001 04/2012
©2012 Overland Storage, Inc.
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