alto protocol

Application Layer Transport Optimization (ALTO) is a protocol that allows internet clients to obtain information that compares the network properties of paths to other endpoints. Typically, this would be used to identify the lowest-cost location to access a copy of some sort of content.The ALTO base protocol is specified in RFC 7285. It requires "ALTO servers" to be deployed in the network with knowledge of network properties, often simply the routing cost to various endpoints. An "ALTO client," typically tied to a user agent attempting to obtain a resource, queries the ALTO server over HTTP to obtain the optimal location from which to retrieve the resource.

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