10 Gigabit Ethernet. 10 Gigabit Ethernet is the latest generation and delivers a data rate of 10 Gbit/s (10,000 Mbit/s), and a fiber optic or twisted pair cable can be used. 10GBASE-LX4, 10GBASE-ER and 10GBASE-SR based on an optical fiber cable can be used to bridge distances of up to 10,000 m (6.2 miles).
Endogamy is the practice of marrying within a specific ethnic group, class, or social group, rejecting others on such a basis as being unsuitable for marriage or for other close personal relationships.
Marriage outside of a specific group especially as required by custom or law is exogamy. Exogamous groups sometimes even specify the group into which members must marry. Such groups are usually defined in terms of kinship rather than in terms of politics or territory.