User's Manual

Glossary
324 Installation and User Guide: NMS Pro
node
Generic term for a network entity. Includes an access point, network adapter (wireless or wired),
or network appliance (such as a print server or other non-computer device).
Network Time Protocol (NTP)
NTP servers are used to synchronize clocks on computers and other devices. Airgo APs have the
capability to connect automatically to NTP servers to set their own clocks on a regular basis.
Packet INternet Groper (PING)
A utility that determines whether a specific IP address is accessible, and the amount of network
time (measured in milliseconds) needed for response. PING is used primarily to troubleshoot
Internet connections.
policy-based networking
The management of a network with rules (or policies) governing the priority and availability of
bandwidth and resources, based both on the type of data being transmitted and the privileges
assigned to a given user or group of users. This allows network administrators to control how the
network is used in order to help maximize efficiency.
Power over Ethernet (PoE)
Power supplied to a device by way of the Ethernet network data cable instead of an electrical
power cord.
preamble type
The preamble defines the length of the cyclic redundancy check (CRC) block for communication
between the access point and a roaming network adapter. All nodes on a given network should use
the same preamble type.
Quality of Service (QoS)
QoS is a term encompassing the management of network performance, based on the notion that
transmission speed, signal integrity, and error rates can be managed, measured, and improved. In a
wireless network, QoS is commonly managed through the use of policies.
Remote Authentication Dial-In User Service (RADIUS)
A client/server protocol and software that enables remote access servers to communicate with a
central server in order to authenticate users and authorize service or system access. RADIUS
permits maintenance of user profiles in a central repository that all remote servers can share.
Radio Frequency (RF)
The electromagnetic wave frequency radio used for communications applications.
roaming
Analogous to the way cellular phone roaming works, roaming in the wireless networking
environment is the ability to move from one AP coverage area to another without interruption in
service or loss in connectivity.
rogue AP
An access point that connects to the wireless network without authorization.
Secure Shell (SSH)
Also known as the Secure Socket Shell, SSH is a UNIX-based command line interface for secure
access to remote systems. Both ends of a communication are secured and authenticated using a
digital certificate, and any passwords exchanged are encrypted.
Service Set Identifier (SSID)
The SSID is a unique identifier attached to all packets sent over a wireless network, identifying