5.
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5.1.
. , , , . - , . , . , , TTL (" (Time To Live)"), .
5.2.
- , CPU. . . , /etc/resolv.conf , ( ?), "DNS ". " ", .
5.3.
- , , , , . . , , . ( ) , Internet. Internet. Internet . Internet, , , . , . named.
/ ; , , .