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For Question & Answer on IP Address,
Subnet Mask, ARP etc.  click here

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For Question & Answer on DNS, DNS Zones etc.  click here

For Question & Answer on DNS, DNS Zones and AD etc. click here

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Name 3 benefits of using AD-integrated zones.
Active Directory-integrated DNS enables Active Directory storage and replication of
DNS zone databases. Windows 2000 DNS server, the DNS server that is included with  Windows 2000 Server, accommodates storing zone data in Active Directory. When you configure a computer as a DNS server, zones are usually stored as text files on name  servers - that is, all of the zones required by DNS are stored in a text file on the server computer. These text files must be synchronized among DNS name servers by  using a system that requires a separate replication topology and schedule called  a zone transfer However, if you use Active  Directory-integrated DNS when you  configure a domain controller as a DNS name server, zone data is stored as an  Active Directory object and is replicated as part of domain replication.

What are the benefits of using Windows 2003 DNS when using
AD-integrated zones?
If your DNS topology includes Active Directory, use Active Directory-integrated zones.
Active Directory-integrated zones enable you to store zone data in the Active
Directory database. Zone information about any primary DNS server within an
Active Directory- integrated zone is always replicated. Because DNS replication is
single-master, a primary DNS server in a standard primary DNS zone can be a single
point of failure. In an Active Directory-integrated zone, a primary DNS server
cannot be a single point of failure because Active Directory uses multimaster
replication. Updates that are made to any domain controller are replicated to all
domain controllers and the zone information about any primary DNS server within
an Active Directory-integrated zone is always replicated. Active
Directory-integrated zones:
• Enable you to secure zones by using secure dynamic update.
• Provide increased fault tolerance. Every Active Directory-integrated zone can be
replicated to all domain controllers within the Active Directory domain or forest.
All DNS servers running on these domain controllers can act as primary servers for the
zone and accept dynamic updates.
• Enable replication that propagates changed data only, compresses replicated data,
and reduces network traffic. If you have an Active Directory infrastructure, you can
only use Active Directory-integrated zones on Active Directory domain controllers.
If you are using Active Directory-integrated zones, you must decide whether or not
to store Active Directory-integrated zones in the
application directory partition. You can combine Active Directory-integrated zones
and file-based zones in the same design.
For example, if the DNS server that is authoritative for the private root zone is
running on an operating system other than Windows Server 2003 or Windows 2000,
it cannot act as an Active Directory domain controller. Therefore, you must use
file-based zones on that server. However, you can delegate this zone to any domain
controller running either Windows Server 2003 or Windows 2000.