UDDI uses internet standards such as XML, HTTP and DNS protocols of which of the following?
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World wide web consortium (W3C)
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Internet Engineering Task Force (IETF)
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Both A and B
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None of the above
UDDI uses XML (W3C standard), HTTP (IETF standard), and DNS protocols (IETF standard). Both W3C and IETF are standards bodies that define these protocols. W3C governs XML-related standards, while IETF governs HTTP and DNS.
UDDI (Universal Description, Discovery and Integration) is a web-services registry standard that relies on other underlying internet/web standards: XML and (typically) SOAP/HTTP come from the W3C's family of specifications, while HTTP as a network protocol and DNS as the naming system are IETF-defined standards (via RFCs). Since the technologies UDDI leans on span both standards bodies — XML/web standards (W3C) and core internet protocols (IETF) — "Both A and B" is the most accurate answer rather than crediting only one organization.