1. A method for testing the connectivity of software applications hosted on networked computers, comprising the following steps: using configuration files for respective desired hosted function applications to generate quasi-hosted function applications that simulate the communications functions of respective ones of said desired hosted function applications, each configuration file containing configuration parameters and data; building executable files for said quasi-hosted function applications and loading said executable files into networked computers; causing one or more of said quasi-hosted function applications to exchange data blocks among quasi-hosted function applications via the network; and acquiring and analyzing data representing the connectivity of said quasi-hosted function applications.