Instruction manual

Chapter 1: Introduction to the NetScaler 9000 Series
1-10 NetScaler 9000 Series Installation and Configuration Guide - Volume 1
NSICG60_JAN05
performance through the integration of in-memory static and dynamic
caching.
1.4.6 Secure Remote Access User Packs
For those businesses that wish to increase the capacity of the Secure Remote
Access (SSL VPN) feature in the NetScaler 9000 Series, additional user packs
are available as a means of boosting the number of concurrent user sessions
supported. By default, the Secure Application Accelerator supports one
concurrent user while both the Secure Application Gateway and the Secure
Application Switch support five concurrent user sessions, at no additional
charges.
1.5 Features at a Glance
1.5.1 Application Intelligent Architecture
Based on NetScaler’s Request Switching™ technology, the NetScaler 9000
system improves the throughput and scalability of application infrastructure
by de-coupling the flow of application requests and responses from the
underlying transport -- offloading transport processing from servers and
freeing valuable CPU cycles. The NetScaler 9000 system then makes optimal
use of transport protocols and resources – regulating the flow of requests,
keeping long-lived TCP connections and multiplexing application level
requests across them – maximizing efficiency even when all of the content is
compressed or secured. By leveraging this unique ability to analyze requests
and responses, the NetScaler 9000 system can identify and defeat Denial of
Service attacks and intrusion attempts, recognize legitimate traffic and boost
it in priority to ensure optimal end-user response times.
Request Switching includes the following traffic management techniques:
z Offloads transport processing from servers and caches
z Analyzes and optimizes every server response
z Provides adaptive regulation of request flow without transaction loss
z Keeps client TCP connections alive to speed response times
z Multiplexes and de-multiplexes application level requests to maximize
server efficiency