The main source of slavery in this part of the world in the Middle Ages was indebtedness. In China, impoverished peasants frequently sold members of their own families into slavery, and throughout the entire medieval period criminals or members of their families became slaves of the state.
Nonetheless, NAT can introduce complications in communication between hosts.     * NAT(Network Address Translation) is most commonly used by broadband routers. NAT allows the router to assign non-publically routable IP addresses to the computers on the network.
What Is Network Address Translation? NAT was originally developed as an interim solution to combat IPv4 address depletion by allowing globally registered IP addresses to be re-used or shared by several hosts. The classic NAT defined by RFC 1631 [3] maps IP addresses from one realm to another. Although it can be used to translate between any two address realms, NAT is most often used to map IPs from the nonroutable private address spaces defined by RFC 1918 [4] , shown below.