DNA Baser Network Edition has two components/applications: the master and the client(s).
The client application is the real/productivity application that you use to assemble sequences. The master application is the one that delivers the license key to the clients. Most of the time, the master is laying dormant. You have to interact with it only once, after purchase.
For convenience, we will name the computer on which the Master program is running, the 'master computer' and the computers on which the clients are running the 'client computer(s)'. The users that are using the DNA Baser client application are called 'clients'.
When a client starts the DNA Baser Client, it connects to the master (via the local network) and it asks for a key. In response, the master 'borrows' a license key to the client IF available and decreases the number of total
keys with one. If the master has no key available, the client will not be able to acquire a key and therefore it will not work until a user that already uses the software
closes its software and thus releasing the key for other users to use.