NEST-208 Configuring DNS Servers UNIT 2 Questions and Answers 2024/2025
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Course
NEST
Institution
NEST
Domain Name System (DNS)
A hierarchical system for naming resources on the Internet.
fully qualified domain name (FQDN)
The full domain name for a host that specifically identifies it within the hierarchy of the
Domain Name System.
DNS namespace
The entire DNS tree that defines t...
NEST-208 Configuring DNS Servers UNIT
2 Questions and Answers 2024/2025
Domain Name System (DNS)
A hierarchical system for naming resources on the Internet.
fully qualified domain name (FQDN)
The full domain name for a host that specifically identifies it within the hierarchy of the
Domain Name System.
DNS namespace
The entire DNS tree that defines the structure of the names used to identify resources
in network domains. It consists of a root name (defined as a period), top-level domains,
second-level domains, optionally one or more subdomains, and hostnames separated
by periods.
root system
A DNS server that keeps a database of addresses of other DNS servers managing
top-level domain names.
top-level domain (TLD) servers
DNS servers that maintain addresses of other DNS servers that are authoritative for
second-level domains that use the top-level domain. For example, a TLD server for the
com top-level domain contains NS records for authoritative DNS servers for all
domains ending in com.
Hostnames
An assigned name that is associated with an IP address, so when a client looks up the
name www.microsoft.com, the DNS server returns an IP address.
A grouping of DNS information that represents one or more domains and possibly
subdomains.
resource records
Data in a DNS database containing information about network resources, such as
hostnames, other DNS servers, and services; each record is identified by a letter code.
DNS client
A computer making a DNS query
DNS resolver
A DNS client that sends a recursive query to a DNS server
iterative query
A type of DNS query to which a DNS server responds with the best information it has
to satisfy the query. The DNS server doesn't query additional DNS servers in an
attempt to resolve the query.
refferal
(1) A response to an iterative query in which the address of another name server is
returned to the requester.
(2) A prioritized list of servers used to access files in a namespace.
recursive query
A query in which the DNS server processes the query until it responds with an address
that satisfies the query or with an "I don't know" message. The process might require
the DNS server to query several additional DNS servers.
authoritative server
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