When you really get to know the advanced functions in Microsoft Excel, one function that you will no doubt begin to use frequently is the IF function. In automating your calculations and data manipulation, the IF function will give you some of the same features that professional developers often use to design programs.
Pointer (PTR) resource records that are created automatically when you add a host (A or AAAA) resource record to a zone will be deleted automatically if the corresponding host (A or AAAA) resource record is deleted.You can complete this procedure using either the DNS Manager snap-in or the dnscmd command-line tool.lick OK to add the new record to the zone. To add a pointer (PTR) resource record to a reverse lookup zone using a command line. Open a command prompt. To open an elevated Command Prompt window, click Start, point to All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
The Address (A) record associates a domain name with an IP address, which is the primary purpose of the DNS system. The Pointer (PTR) record provides data for reverse DNS, which is used for logging the domain name and verification purposes.Also called inverse DNS, the PTR record is an option.See reverse DNS.he Address (A) record associates a domain name with an IP address, which is the primary purpose of the DNS system. The Pointer (PTR) record provides data for reverse DNS, which is used for logging the domain name and verification purposes.