| http://www.w3.org/ns/prov#value | - Firewalls 250 a and 250 b may, for example, be implemented by firewall software executing on a computing device, such as a router that connects the various units. [0029] As shown by the various communication lines in FIG. 2A, communication is permitted between certain components of eCBT servicing unit 270 and back-end 260, and also between certain components of eCBT servicing unit 270 and test cen
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