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2.1 Transport

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The OData protocol that is defined in this specification and the Atom Publishing Protocol (AtomPub) [RFC5023] both use HTTP (as specified in [RFC2616]) as the transport layer. HTTP operations are performed on resources identified by a URI. URI Format: Resource Addressing Rules (section 2.2.3) describes the resource addressing rules defined by this specification which extend the addressing rules used by AtomPub and HTTP.

A TCP port has not been reserved for this protocol. TCP port 80 is commonly used because many HTTP proxy servers forward only HTTP traffic that use port 80.

This specification does not prescribe a mechanism to secure (authenticate, encrypt, and so on) AtomPub communications. For security recommendations which relate to the protocol's transport layer, see [RFC5023] section 15.