Each network has a database on each catalog server with the same name as the network. This is known as the network database and you can connect to this database to manage the network and/or perform queries in the network.
The josql command can be used to connect to database, by using:
josql <network> <user> -h <host>
<network> is the name of the network
<users> is the username to connect as
<host> is the host name or IP address of a catalog server