tailieunhanh - The Best Damn Windows Server 2003 Book Period- P73

The Best Damn Windows Server 2003 Book Period- P73:The latest incarnation of Microsoft’s server product,Windows Server 2003, brings many new features and improvements that make the network administrator’s job chapter will briefly summarize what’s new in 2003 and introduce you to the four members of the Windows Server 2003 family: the Web Edition, the Standard Edition, the Enterprise Edition, and the Datacenter Edition. | 686 Chapter 20 Planning Implementing and Maintaining a Name Resolution Strategy DNS DHCP Interaction As is the case with Windows 2000 Windows Server 2003 supports the DDNS standard RFC 2136 to dynamically update both forward and reverse lookup zones with A and PTR RRs respectively. A forward lookup zone resolves host names to IP addresses a reverse lookup zone resolves IP addresses to host names. DDNS reduces much of the administrative burden in managing a zone files in a DNS infrastructure. In particular DDNS makes it possible for AD domain controllers to create and update the SRV RRs that are fundamental to the proper operation of AD. DDNS is also used in combination with DHCP to ensure that DHCP clients will have the appropriate records registered for them in DNS and the DNS records are updated whenever IP addresses change or DHCP leases expire. Both clients and DHCP servers are capable of updating the zone records. However only clients that are running Windows 2000 Windows XP or Windows Server 2003 operating systems are capable of directly updating DNS is the default configuration for these clients and can be disabled on the DNS tab of the Advanced property page for TCP IP. Usually DHCP clients will update their own A records in the forward lookup zone but the DHCP servers will update the PTR record in the reverse lookup zone the computer owns the host name but the DHCP server owns the IP address . Clients with manually configured IP addresses will always try to register both an A and a PTR record. Other level clients such as Windows 9x and Windows NT 4 must rely on DHCP servers to update both A and PTR RRs on their behalf. DHCP clients that are capable of dynamically updating DNS records use the DHCP client option 81 to provide the FQDN as specified by the full computer name in the properties of the My Computer object and instructions for the DHCP server to handle DDNS registration. This is configured on the DNS tab of the Advanced property page for