Dynamic updates occur when a DHCP server or a DNS client computer automatically updates the applicable DNS resource records when a DHCP lease is granted (or expires).Three types of dynamic updates exist in Windows Server 2003, each with its own security specifics.Dynamic updates from DHCP are best implemented when the DHCP client computers are not Windows 2000 or later—such as when the client computers are Windows 98 computers.

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This process works the same as any other shared network resource, such as documents on a network file share.

Dynamic updates from DHCP can be configured to allow only specific DHCP servers to update DNS zone entries.

The IP address of one or more master servers that can be used to update the stub zone.

The master servers for a stub zone are one or more DNS servers authoritative for the child zone, usually the DNS server hosting the primary zone for the delegated domain name.

Use stub zones to: Keep delegated zone information current.

By updating a stub zone for one of its child zones regularly, the DNS server hosting both the parent zone and the stub zone will maintain a current list of authoritative DNS servers for the child zone. Stub zones enable a DNS server to perform recursion using the stub zone's list of name servers without needing to query the Internet or internal root server for the DNS namespace. By using stub zones throughout your DNS infrastructure, you can distribute a list of the authoritative DNS servers for a zone without using secondary zones.However, stub zones do not serve the same purpose as secondary zones and are not an alternative when considering redundancy and load sharing.There are two lists of DNS servers involved in the loading and maintenance of a stub zone: - The list of master servers from which the DNS server loads and updates a stub zone.- The list of the authoritative DNS servers for a zone. Enhanced logging enables monitoring of all DNS query, response, and operational transactions. Zone-level statistics:- Zone level statistics are available for different resource record types, zone transfers, and dynamic updates. DNSSEC support:- DNSSSEC key management and support for signed file-backed zones is improved. Windows Power Shell :- New Windows Power Shell parameters are available for DNS Server.This list is contained in the stub zone using name server (NS) resource records. Dynamic DNS a method of keeping a domain name linked to a changing IP address as not all computers use static IP addresses.