/sys$common/syshlp/helplib.hlb SHOW, NETWORK, Parameter  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 network-service

    Specifies a network service for which you want to display
    information.

    If you do not specify a service, the SHOW NETWORK command
    displays information about all services that are currently
    registered on the local node.