Corporation Network Router User Manual

Glossary-24
System Global Area (SGA)
A group of shared memory structures that contain data and control information for
an Oracle instance.
system identifier (SID)
A unique name for an Oracle instance. To switch between Oracle databases, users
must specify the desired SID. The SID is included in the CONNECT DATA parts of
the connect descriptor in a tnsnames.ora file, and in the definition of the network
listener in a listener.ora file.
ticket
A piece of information that helps identify who the owner is. See service ticket.
tnsnames.ora
A file that contains connect descriptors; each connect descriptor is mapped to a net
service name. The file may be maintained centrally or locally, for use by all or
individual clients. This file typically resides in the following locations depending on
your platform:
■ (UNIX) ORACLE_HOME/network/admin
■ (Windows) ORACLE_BASE\ORACLE_HOME\network\admin
token card
A device for providing improved ease-of-use for users through several different
mechanisms. Some token cards offer one-time passwords that are synchronized
with an authentication service. The server can verify the password provided by the
token card at any given time by contacting the authentication service. Other token
cards operate on a challenge-response basis. In this case, the server offers a
challenge (a number) which the user types into the token card. The token card then
provides another number (cryptographically-derived from the challenge), which
the user then offers to the server.
transport layer
A networking layer that maintains end-to-end reliability through data flow control
and error recovery methods. Oracle Net Services uses Oracle protocol supports for
the transport layer.
trusted certificate
A trusted certificate, sometimes called a root key certificate, is a third party identity
that is qualified with a level of trust. The trusted certificate is used when an identity