Dns records updating
The mail server mail2com has an entirely different IP address and so is likely located remotely from Johns home and perhaps is his backup email server in case of failure of his primary email server com.The OFFLINE URL is a backup feature in case you want to direct your HOST to some URL address instead of a fixed or dynamic IP address.(***) Represents some remote URL (or local A-Record or C-Name that the DNS is providing the "alias" host name for.In this example, the .187 IP addresses represent Johns home computer IP address.Microsoft is conducting an online survey to understand your opinion of the Technet Web site.If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.
DNS does not SEND you anyplace You furnish DNS with a NAME (such as com) DNS returns to you the IP address (analogus to a telephone number) of your specified domain name or subdomain so YOUR computer knows the IP address to which to direct its service request. These can be used for pointing incoming mail to your domains (such as john.com) to the proper mail server.Note that the DESTINATION ADDRESS of an MX record MUST be a domain name and NOT simply an IP address.