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.
A nucleic acid test, often called a NAT, (or nucleic acid amplification test - NAAT) is a molecular technique used to detect a virus or a bacterium. These tests were developed to shorten the window period, a time between when a patient has been infected and when they show up as positive by antibody tests.