Cisco Systems OL-24201-01 manual GL-14

Glossary

PI (Programmatic	The ACS PI is a programmatic interface that provides external applications the ability to communicate
Interface)	with ACS to configure and operate ACS; this includes performing the following operations on ACS
	objects: create, update, delete and read.
policy condition	Rule-based single conditions that are based on policies, which are sets of rules used to evaluate an
	access request and return a decision.
policy element	Global, shared object that defines policy conditions (for example, time and date, or custom conditions
	based on user-selected attributes) and permissions (for example, authorization profiles). Policy
	elements are referenced when you create policy rules.
port setting	You can configure ACS to authenticate using different LDAP servers, or different databases on the
	same LDAP server, by creating more than one LDAP instance with different IP addresses or port
	settings.

PPP(Point-to-PointPPP is a protocol for communication between two computers using a serial interface, typically a

Protocol)	personal computer connected by phone line to a server. For example, your Internet server provider
	may provide you with a PPP connection so that the provider's server can respond to your requests, pass
	them on to the Internet, and forward your requested Internet responses back to you. PPP uses the
	Internet Protocol (IP) and is designed to handle others. It is sometimes considered a member of the
	TCP/IP suite of protocols. Relative to the Open Systems Interconnection (OSI) reference model, PPP
	provides layer 2 (data-link layer) service. Essentially, it packages your computer's TCP/IP packets and
	forwards them to the server where they can actually be put on the Internet.
protocol	A protocol is the special set of rules that end points in a telecommunication connection use when they
	communicate. Protocols exist at several levels in a telecommunication connection. For example, there
	are protocols for the data interchange at the hardware device level and protocols for data interchange
	at the application program level. In the standard model known as Open Systems Interconnection
	(OSI), there are one or more protocols at each layer in the telecommunication exchange that both ends
	of the exchange must recognize and observe. Protocols are often described in an industry or
	international standard.
Proxy	An HTTP Proxy is a server that acts as a middleman in the communication between HTTP clients and
	servers.
Public Key	In Cryptography a publicKey is a value provided by some designated authority as an Encryption Key
	that, combined with a private key derived from the public key, can be used to effectively encrypt
	messages andDigital Signatures.
	The use of combined public and private keys is known as asymmetric cryptography. A system for
	using public keys is called a public key infrastructure (PKI).
Public Key	A PKI enables users of a basically unsecure public network such as the Internet to securely and

Infrastructure (PKI) privately exchange data and money through the use of a public and a private cryptographic key pair that is obtained and shared through a trusted authority. The Public Key infrastructure provides for a Digital Certificate that can identify an individual or an organization and directory services that can store and, when necessary, revoke the certificates. Although the components of a PKI are generally understood, a number of different vendor approaches and services are emerging. Meanwhile, an Internet standard for PKI is being worked on.

	User Guide for Cisco Secure Access Control System 5.3
GL-14	OL-24201-01