4. ________________ provide a way to partition the domain namespace into man-
ageable sections, and each ________________ represents a discrete portion of the
domain namespace.
Lesson Summary
■ The DNS database is indexed by name, so each domain (node) must have a name.
The hierarchical structure of the domain namespace consists of a root domain,
top-level domains, second-level domains, and host names.
■ When creating a domain namespace, you should use certain guidelines, such as
limiting the number of domain levels and using unique and simple names.
■ Zones provide a way to partition the domain namespace into smaller sections, so
a zone represents a discrete portion of the domain namespace.
■ A DNS name server stores the zone database file. Name servers can store data for
one zone or multiple zones. A name server is said to have authority for the domain
namespace that the zone encompasses.
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