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HWC_Glossary.fm
Glossary
Networking terms and abbreviations
Term
Explanation
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).
SSH
Secure Shell, sometimes known as Secure Socket Shell, is a
Unix-based command interface and protocol for securely getting
access to a remote computer. SSH is a suite of three utilities - slogin,
ssh, and scp - secure versions of the earlier UNIX utilities, rlogin, rsh,
and rcp. With SSH commands, both ends of the client/server
connection are authenticated using a digital certificate, and passwords
are protected by being encrypted.
SSID
Service Set Identifier. A 32-character unique identifier attached to the
header of packets sent over a Wireless LAN that acts as a password
when a wireless device tries to connect to the Basic Service Set
(BSS). Several BSSs can be joined together to form one logical WLAN
segment, referred to as an extended service set (ESS). The SSID is
used to identify the ESS.
In 802.11 networks, each Access Point advertises its presence several
times per second by broadcasting beacon frames that carry the ESS
name (SSID). Stations discover APs by listening for beacons, or by
sending probe frames to search for an AP with a desired SSID. When
the station locates an appropriately-named Access Point, it sends an
associate request frame containing the desired SSID. The AP replies
with an associate response frame, also containing the SSID.
Some APs can be configured to send a zero-length broadcast SSID in
beacon frames instead of sending their actual SSID. The AP must
return its actual SSID in the probe response.
A31003-W1010-A100-1-7619, July 2005
HiPath Wireless Controller, Access Points and Convergence Software V3.0: User Guide
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