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.
After you create a zone, additional resource records need to be added to it. The most common resource records (RRs) to be added are: 1  Host (A) For mapping a DNS domain name to an IP address used by a computer. 2  Alias (CNAME) For mapping an alias DNS domain name to another primary or canonical name.he host (A) resource record is not required for all computers, but is needed by computers that share resources on a network. Any computer that shares resources and needs to be identified by its DNS domain name, needs to use A resource records to provide DNS name resolution to the IP address for the computer.