Glossary
Summit WM User Guide, Software Version 5.3308
BSS Basic Service Set. A wireless topology consisting of one Access Point
connected to a wired network and a set of wireless devices. Also called an
infrastructure network. See also IBSS.
Captive Portal A browser-based authentication mechanism that forces unauthenticated
users to a Web page. Sometimes called a "reverse firewall".
CDR Call Data (Detail) Record
In Internet telephony, a call detail record is a data record that contains
information related to a telephone call, such as the origination and
destination addresses of the call, the time the call started and ended, the
duration of the call, the time of day the call was made and any toll charges
that were added through the network or charges for operator services,
among other details of the call.
In essence, call accounting is a database application that processes call data
from your switch (PBX, iPBX, or key system) via a CDR (call detail record)
or SMDR (station message detail record) port. The call data record details
your system's incoming and outgoing calls by thresholds, including time of
call, duration of call, dialing extension, and number dialed. Call data is
stored in a PC database
CHAP Challenge-Handshake Authentication Protocol. One of the two main
authentication protocols used to verify a user's name and password for PPP
Internet connections. CHAP is more secure than PAP because it performs a
three-way handshake during the initial link establishment between the
home and remote machines. It can also repeat the authentication anytime
after the link has been established.
CLI Command Line Interface.
Collision Two Ethernet packets attempting to use the medium simultaneously.
Ethernet is a shared media, so there are rules for sending packets of data to
avoid conflicts and protect data integrity. When two nodes at different
locations attempt to send data at the same time, a collision will result.
Segmenting the network with bridges or switches is one way of reducing
collisions in an overcrowded network.
Datagram A datagram is "a self-contained, independent entity of data carrying
sufficient information to be routed from the source to the destination
computer without reliance on earlier exchanges between this source and
destination computer and the transporting network." (RFC1594). The term
has been generally replaced by the term packet. Datagrams or packets are
the message units that the Internet Protocol deals with and that the Internet
transports.
Decapsulation See tunnelling.
Device Server A specialized, network-based hardware device designed to perform a
single or specialized set of server functions. Print servers, terminal servers,
remote access servers and network time servers are examples of device
servers.
Term Explanation
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