There are several approaches to measuring e-business transaction response time. Broadly, they fall into four categories, client-based "active" ghost transactions -- a client executes periodic active ghost application transactions against various application servers on the network and records the response times. Ghost transactions are representative of and specific to the application. Client-based "passive" agent measuring -- client workstations are equipped with agent software that clocks response times. Point-to-point packet inspection -- packets are monitored by probes as they travel between network points. Application response time measurement (ARM) -- ARM is a set of application program interfaces that report performance data back to a management application.
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