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1 Introduction

This specification describes the core protocol services of the DirectPlay 4 Protocol. The DirectPlay 4 Protocol facilitates communication between computer games for which a host computer manages the metadata of multiple computer game instances supporting multiple players. The protocol enables the implementation of functions to enumerate hosted game sessions and players, to add and remove game players, and to interchange data between game instances.

Sections 1.8, 2, and 3 of this specification are normative and can contain the terms MAY, SHOULD, MUST, MUST NOT, and SHOULD NOT as defined in RFC 2119. Sections 1.5 and 1.9 are also normative but cannot contain those terms. All other sections and examples in this specification are informative.

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