Which statement describes Cross-Origin Resource Sharing (CORS)?

Which statement describes Cross-Origin Resource Sharing (CORS)?
A . It allows for signaling-groups to be used by more than one trunk-group.
B . It is a W3C specification that allows cross-domain communication from the browser.
C . It is making DSP resources available regardless of the originating location of a call.
D . It is a network setup by which an Avaya Aura® Media Server (AAMS) can be used by more than one Avaya Aura® Communications Manager (CM).

View Answer

Answer: B

Explanation:

Cross-origin resource sharing (CORS) is a mechanism that allows restricted resources (e.g. fonts) on a web page to be requested from another domain outside the domain from which the first resource was served. A web page may freely embed cross-origin images, stylesheets, scripts, iframes, and videos.

Note on the History of CORS:

Cross-origin support was originally proposed by Matt Oshry, Brad Porter, and Michael

Bodell of Tellme Networks in March 2004 for inclusion in VoiceXML 2.1 to allow safe cross-

origin data requests by VoiceXML browsers.

In May 2006 the first W3C Working Draft was submitted. In March 2009 the draft was renamed to "Cross-Origin Resource Sharing" and in January 2014 it was accepted as a W3C Recommendation.

References: https://en.wikipedia.org/wiki/Cross-origin_resource_sharing