m.singer Mon, 08/13/2007 - 11:36

The boomerang method is based on the concept that instantaneous proximity can be determined if a CRA within each data center sends an A-record (IP address) at the exact same time to the client's D-proxy. The DNS race method of DNS resolution gives all CRAs (Cisco content engines or content services switches) a chance at resolving a client request and allows for proximity to be determined without probing the client's D-proxy. Whatever A-record is received first by the D-proxy is, by default, considered to be the most proximate.

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