Which of these is not a feature of WAP 2.0?

Concept: WAP 2.0 (Wireless Application Protocol 2.0) is a protocol suite that lets mobile devices access web services. Its defining features are the communication and content-delivery capabilities it standardises — the Push and Pull models, multimedia (MMS) support, and interfaces such as the External Functionality Interface to device resources including storage. To answer a 'which is NOT a feature' item, identify which option is not part of this protocol's own feature set.

Application: Hashing is a general cryptographic primitive (a one-way digest function) used inside security mechanisms; it is not itself a WAP 2.0 protocol feature. WAP 2.0's security is handled at the transport layer (it adopted end-to-end TLS), and hashing is never exposed as a standalone WAP feature, so 'Hashing' is the option that does not belong.

Contrast with the genuine WAP 2.0 features:

• Push and Pull Model — a core delivery mechanism letting the server initiate content (push) as well as respond to client requests (pull).

• Interface to a storage device — provided through the External Functionality Interface / persistent-storage support for accessing device resources.

• Multimedia messaging — MMS is a standard capability defined in the WAP 2.0 specification.