Installation guide

Glossary
GL-5
Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
OL-26645-02
redundancy
In internetworking, the duplication of devices, services, or connections so that, in the event of a failure,
the redundant devices, services, or connections can perform the work of those that failed.
resource class
A defined set of resources and allocations available for use by a device (such as an ACE appliance).
Using resource classes prevents a single device from using all available resources.
role
See user role.
RSA
Rivest, Shamir, and Adelman Signatures. A public-key cryptographic system used for authentication.
RTSP
Real Time Streaming Protocol. A client-server multimedia presentation control protocol, designed to
address the needs for efficient delivery of streamed multimedia over IP networks.
S
SCCP
Skinny Client Control Protocol. A proprietary terminal control protocol owned and defined by Cisco
as a messaging set between a skinny client and the Cisco CallManager (CCM). Examples of skinny
clients include the Cisco 7900 series of IP phone such as the Cisco 7960, Cisco 7940 and the 802.11b
wireless Cisco 7920, along with Cisco Unity voicemail server. See also Skinny.
server farm
A collection of servers that contain the same content.
Server Load Balancer
See SLB.
service
A destination location where a piece of content resides physically. Also referred to in general terms for
this release as including content rules, owners, virtual servers, real servers, and so on.
Simple Message
Transfer Protocol
See SMTP.
SIP
Session Initiation Protocol. Protocol developed by the IETF MMUSIC Working Group as an alternative
to H.323. SIP features are compliant with IETF RFC 2543, published in March 1999. SIP equips
platforms to signal the setup of voice and multimedia calls over IP networks.
Skinny
Skinny is a lightweight protocol which allows for efficient communication with Cisco CallManager.
See also SCCP.
SLB
Server Load Balancer. A device that makes load balancing decisions based on application availability,
server capacity, and load distribution algorithms, such as round robin or least connections. Using load
balancing and server/application feedback, an SLB device determines a real server for the packet flow
and sends this information to the requesting forwarding agent. After the optimal destination is decided
on, all other packets in the packet flow are directed to a real server by the forwarding agent, increasing
packet throughput.
special configuration
file
Managed file resource on an ACE appliance, such as a piece of a configuration file or a keep-alive
script.
SMTP
Simple Message Transfer Protocol. Internet protocol that provides e-mail services.