User guide

D-12 Glossary
Segment In Ethernet networks, a section of a network that is bounded by
bridges, routers or switches. Dividing a LAN segment into multiple
smaller segments is one of the most common ways of increasing
available bandwidth on the LAN.
SLP Service Location Protocol. A method of organizing and locating
the resources (such as printers, disk drives, databases, e-mail
directories, and schedulers) in a network. Using SLP, networking
applications can discover the existence, location and configuration
of networked devices.
With Service Location Protocol, client applications are 'User
Agents' and services are advertised by 'Service Agents'. The User
Agent issues a multicast 'Service Request' (SrvRqst) on behalf of
the client application, specifying the services required. The User
Agent will receive a Service Reply (SrvRply) specifying the
location of all services in the network which satisfy the request.
For larger networks, a third entity, called a 'Directory Agent',
receives registrations from all available Service Agents. A User
Agent sends a unicast request for services to a Directory Agent (if
there is one) rather than to a Service Agent.
(SLP version 2, RFC2608, updating RFC2165)
SMI Structure of Management Information. A hierarchical tree structure
for information that underlies Management Information Bases
(MIBs), and is used by the SNMP protocol. Defined in RFC1155
and RFC1442 (SNMPv2).
SMT (802.11) Station ManagemenT. The object class in the 802.11 MIB that
provides the necessary support at the station to manage the
processes in the station such that the station may work
cooperatively as a part of an IEEE 802.11 network. The four
branches of the 802.11 MIB are:
dot11smt - objects related to station management and local
configuration
dot11mac - objects that report/configure on the status of various
MAC parameters
dot11res - Objects that describe available resources
dot11phy - Objects that report on various physical items.
SNMP Simple Network Management Protocol. A set of protocols for
managing complex networks. SNMP works by sending messages,
called protocol data units (PDUs), to different parts of a network.
SNMP-compliant devices, called agents, store data about
themselves in Management Information Bases (MIBs) and return
this data to the SNMP requesters.
SNMP includes a limited set of management commands and
responses. The management system issues Get, GetNext and
Set messages to retrieve single or multiple object variables or to
establish the value of a single variable. The managed agent sends
a Response message to complete the Get, GetNext or Set.
SNMP trap An event notification sent by the SNMP managed agent to the
management system to identify the occurrence of conditions (such
as a threshold that exceeds a predetermined value).
Term Definition