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Network Infrastructure Implementation
Chapter 4 Configuring and Managing the DNS Server Role
29
Computer Networking
Undergraduate 1
06/27/2012

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Term
authoritative
Definition
DNS server that hosts a primary or secondary zone for a particular DNS domain.
Term
authoritative answer
Definition
Response from a DNS server that hosts a primary or secondary zone for the DNS domain being queried.
Term
canonical name (CNAME) resource record
Definition
Creates an alias to an existing A or AAAA record.
Term
conditional forwarder
Definition
DNS configuration option that refers queries to remote forwarders based on the domain name contained within the query.
Term
country code
Definition
Names that map to individual countries such as .uk, .pl, and .it.
Term
discretionary access control list (DACL)
Definition
Enables you to specify which users and groups may modify the DNS zones and records
Term
DomainDNSZones
Definition
DNS replication scope that copies DNS data to all DCs in a domain that are configured as DNS servers.
Term
file-backed zone
Definition
DNS zone that stores its data in a text file on the DNS server.
Term
ForestDNSZones
Definition
DNS replication scope that copies DNS data to all DCs in a forest that are configured as a DNS server.
Term
forwarder
Definition
DNS configuration option that refers queries that cannot be resolved by the local DNS server to another DNS server on the same network or on a remote network.
Term
forward lookup zone
Definition
Zone that responds to client requests to map known host names to IP addresses.
Term
forwarding-only server
Definition
DNS server that will not perform any recursion after forwarders fail. If it cannot resolve a query by using its configured forwarders, it will return a negative response to the query.
Term
full zone transfer (AXFR)
Definition
Copying the entire contents of a DNS zone during a zone transfer.
Term
host (A)
Definition
Maps an FQDN to an IPv4 address.
Term
host (AAAA) resource record
Definition
Maps an FQDN to an IPv6 address
Term
incremental zone transfer (IXFR)
Definition
Copying only the contents of a DNS zone that have changed since the last zone transfer to cut down on network traffic.
Term
in-addr.arpa domain
Definition
DNS zone used for reverse lookup queries of IPv4 DNS records.
Term
ip6.arpa domain
Definition
DNS zone used for reverse lookup queries of IPv6 DNS records.
Term
mail exchanger (MX) resource record
Definition
DNS record that allows e-mail applications to locate e-mail servers.
Term
PTR resource record
Definition
DNS resource record that maps a known IP address to a host name.
Term
reverse lookup zone
Definition
Zone that responds to client requests to map known IP addresses to host names.
Term
root hints
Definition
Using the top-level Internet DNS servers to resolve a query.
Term
second-level domains
Definition
DNS domains that are registered to individuals or organzations such as microsoft, hp, dell, and so forth.
Term
secure dynamic updates
Definition
Allows DNS records to be updated only by the client that first registered the record.
Term
standard zone
Definition
DNS zone that stores its data in a text file on the DNS server.
Term
stub zone
Definition
DNS zone that contains sufficient information to locate authoritative name servers for a DNS domain.
Term
Time to Live (TTL)
Definition
Amount of time for which a DNS record is valid before it must be re-verified.
Term
top-level domains
Definition
Top-most domains in the DNS namespace hierarchy such as .com, .org, or .biz.
Term
zone transfer
Definition
Process of copying DNS zone data from a server hosting a primary zone to a server hosting a secondary zone.
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