User guide

Appendices 335
Positive hysteresis is the unsigned number of counts subtracted from the raw threshold value,
which creates the re-arm point for all sensor thresholds that are greater than zero (0). A
positive hysteresis value of 0 indicates that any thresholds greater than zero do not
contain hysteresis.
SDR repository device
An SDR repository device is the logical management device that provides a sensor data
records (SDR) system interface, which in turn, provides a set of SDR storage and
retrieval commands.
Serial session
A serial session is a type of target device session in which the target device contains a serial
connection (typically a Linux server TTY port or a router) and is connected through a CPS or
CCM appliance. A Telnet Viewer connection exists between the DSView software client and
the CPS or CCM appliance. The appliance converts the Telnet information to
serial information.
Server
A server is a computer or device on a network that manages network resources. For example:
• A file server is a computer and storage device dedicated to storing files. Any user on the
network can store files on the server.
• A print server is a computer that manages one or more printers.
• A network server is a computer that manages network traffic.
• A database server is a computer system that processes database queries.
Servers are often dedicated, meaning that they perform no other tasks besides their server
tasks. However, on multiprocessing operating systems, a single computer can execute several
programs at once. In this case, a server may refer to the program that is managing resources
rather than the entire computer.
Session
When used alone, a session refers to a target device session. See the definition of a target
device session for details.
Site
A site is a location that contains a managed appliance, DSView software server or both.
SNMP (Simple Network Management Protocol)
SNMP is a set of protocols for managing complex networks. SNMP works by sending
messages to different parts of a network. SNMP-compliant devices, called agents, store data
about themselves in MIBs and return this data to the SNMP requesters.
SNMP manager
The SNMP manager is an optional component (outside of the DSView software system) that
enables the monitoring of many cross-platform devices using SNMP information. SNMP
managers are also called network management systems (NMS).