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Infrastructure Chapter 4
Chapter 4
20
Computer Networking
Undergraduate 2
06/27/2012

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Term
top-level domains
Definition
first level domains are organizational types such as .org .com
Term
Country Code
Definition
One of three top level domains there are .us .jp
Term
second-level domains
Definition
registered to individuals or organizations such as microsoft.com
Term
authoritative
Definition
for a particular zone if its host a primary or secondary zone for a particular DNS domain
Term
standard zone
Definition
text-based zone file containing lists of mapping
Term
file-backed zone
Definition
text-based zone file containing lists of mapping
Term
discretionary access control list (DACL)
Definition
enables you to specify which users and groups may modify the DNS zones
Term
secure dynamic updates
Definition
for Active Directory integrated zones which will only allow records to be updated by the client that first registered the record
Term
DomainDNSZones
Definition
to all domain controllers that are DNS servers in the local domain
Term
ForestDNSZones
Definition
To all domain controllers that are also DNS servers in the entire forest
Term
host (A)
Definition
resource record maps a FQDN to an IPv4 address
Term
(AAAA)resource record
Definition
perfoms the same function as host (A) but for the IPv6 address
Term
canonical name resource record (CNAME)
Definition
used to hide the implementation details of your network resource records from the clients connect to
Term
mail exchanger (MX) resource record
Definition
specifies a server that is configured to act as a mail server for a DNS name.
Term
authoritive answer
Definition
is a positive answer returned to the client and delivered bit set in the DNS message to indicate the answer was obtained from a server with direct authority for the quiered name
Term
root hints
Definition
resolves quieres for names that is not authoritive for or for which it contaains no delegation
Term
time to live (TTL)
Definition
value applies to all cached resource records
Term
forwarder
Definition
is a DNS server on a network used to forward DNS queries for external DNS names to DNS servers outside of that network
Term
conditional forwarder
Definition
forwards quieries on the basis of a domain name
Term
forwarding-only server
Definition
will not perform recursion after the forwarder fails
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