The Citrix Netscaler
Application Delivery Controller (ADC) is a network switch that performs
application-specific traffic analysis to intelligently distribute, optimize,
and secure layer 4 to layer 7 network traffic for web applications. For
example, a Citrix Netscaler Application Delivery Controller (ADC) makes load
balancing decisions on individual HTTP requests instead of on the basis of
long-lived TCP connections, so that the failure or slowdown of a server is
managed much more quickly and with less disruption to clients. The feature set
can be broadly categorized as consisting of switching features, security and
protection features, and server-farm optimization features.
The Cisco Nexus Series switches are used purely as a 1 and 10-Gigabit
Ethernet switch, consolidating 10 Gigabit Ethernet connections into a smaller
number of server connections trunked to the aggregation layers. These switches
are designed for deployment in the core, aggregation, or access layers of a
high performance, hierarchical data center network topology.
The Cisco Nexus Series switches run on the Cisco NX-OS software. This
software fulfills the routing, switching, and storage networking requirements
of data centers and provides an Extensible Markup Language (XML) interface and
a command-line interface (CLI) that is similar to Cisco IOS software. As a
crucial element in data center I/O consolidation, the switch enables I/O
consolidation at the access layer and provides interoperability with the Cisco
Nexus Series switches and other standards-based products.