Glossary
GL-8
Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
DMVPN Dynamic multipoint virtual private network. A virtual private network in which
routers are arranged in a logical hub and spoke topology, and in which the hubs
have point-to-point GRE over IPSec connections with the hub. DMVPN uses
GRE and NHRP to enable the flow of packets to destinations in the network.
single DMVPN A router with a single DMVPN configuration has a connection to one DMVPN
hub, and has one configured GRE tunnel for DMVPN communication.Th e GRE
tunnel addresses for the hub and spokes must be in the same subnet.
DMZ demilitarized zone. A DMZ is a buffer zone between the Internet, and your
private networks. It can be a public network typically used for Web, FTP and
E-Mail servers that are accessed by external clients on the Internet. Placing these
public access servers on a separate isolated network provides an extra measure
of security for your internal network.
DN Distinguished Name. A unique identifier for a Certification Authority customer,
included in each of that customer’s certificates received from that Certification
Authority. The DN typically includes the user’s common name, the name of that
user’s company or organization, the user’s two-letter country code, an e-mail
address used to contact the user, the user’s telephone number, the user’s
department number, and the city in which the user resides.
DNS Domain Name System (or Service). An Internet service that translates domain
names, which are composed of letters, into IP addresses, which are composed of
numbers.
domain name The familiar, easy-to-remember name of a host on the Internet that corresponds
to its IP address.
DRAM dynamic random access memory. RAM that stores information in capacitors that
must be periodically refreshed.
DSLAM digital subscriber line access multiplexer.
DSS digital signature standard. Also called digital signature algorithm (DSA), the
DSS algorithm is part of many public-key standards for cryptographic
signatures.
dynamic routing Routing that adjusts automatically to network topology or traffic changes. Also
called adaptive routing.