The Process Manager Server daemon (JFD) handles communication between the IPv4 and IPv6 hosts in the following manner:
JFD listens on an IPv4 socket and can only accept connections from IPv4 clients.
JFD listens on an IPv6 socket and can only accept connections from IPv6 clients.
IPv4/IPv6 dual stack
JFD can accept connections from both IPv4 and IPv6 clients. Most operating systems that support IPv6 can accept both IPv6 and IPv4 connections by emulating an IPv6 address: the operating system converts the IPv4 address to an IPv4-mapped IPv6 address.