User guide

March 2005 Glossary
Through Software Release 6.1
Page 414 of 425 Issue 1
Canopy System User Guide
Date of Last Transaction
A field in the data that the cmd show esn command generates from
data in the SQL database in the Bandwidth and Authentication
Manager (BAM) server. This field identifies the date of the most recent
authentication attempt by the SM. Expressed in the database output
as DLT.
Dell
A trademark of Dell, Inc.
Demilitarized Zone
Internet Protocol area outside of a firewall. Defined in RFC 2647. See
http://www.faqs.org/rfcs/rfc2647.html
.
DES
Data Encryption Standard. An over-the-air link option that uses secret
56-bit keys and 8 parity bits. DES performs a series of bit
permutations, substitutions, and recombination operations on blocks of
data.
Desensed
Received an undesired signal that was strong enough to make the
module insensitive to the desired signal.
DHCP
Dynamic Host Configuration Protocol, defined in RFC 2131. Protocol
that enables a device to be assigned a new IP address and TCP/IP
parameters, including a default gateway, whenever the device reboots.
Thus DHCP reduces configuration time, conserves IP addresses, and
allows modules to be moved to a different network within the Canopy
system. See http://www.faqs.org/rfcs/rfc2131.html
. See also Static IP
Address Assignment.
Diffraction
Partial obstruction of a signal. Typically diffraction attenuates a signal
so much that the link is unacceptable. However, in some instances
where the obstruction is very close to the receiver, the link may be
acceptable.
Disable
To turn off a feature in the module after both the feature activation file
has activated the module to use the feature and the operator has
enabled the feature in the module. See also Activate and Enable.
DLT
Date of last transaction. A field in the data that the cmd show esn
command generates from data in the SQL database in the Bandwidth
and Authentication Manager (BAM) server. This field identifies the
date of the most recent authentication attempt by the SM.
DMZ
Demilitarized Zone as defined in RFC 2647. An Internet Protocol area
outside of a firewall. See http://www.faqs.org/rfcs/rfc2647.html
.
Dynamic Host
Configuration Protocol
Protocol defined in RFC 2131 that enables a device to be assigned a
new IP address and TCP/IP parameters, including a default gateway,
whenever the device reboots. Thus Dynamic Host Configuration
Protocol reduces configuration time, conserves IP addresses, and
allows modules to be moved to a different network within the Canopy
system. See http://www.faqs.org/rfcs/rfc2131.html
. See also Static IP
Address Assignment.