Old style of a load sharing system without any fault tolerance. A native feature of most major servers; If multiple resource records of the same name and type are found, all will be sent; However, their order will be rotated for successive queries. For example, identical A records could point to different IP Addresses. This works for load sharing because web browsers and other clients usually only expect only one record of the appropriate type in response, and ignore further records after the first. Can cause problems with PTR records, causing mail delivery problems because IPs might not resolve back to the name expected.

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