What is a capability of Interactive Connectivity Establishment passthrough in Cisco Expressway?

Question

Options

• AIt enables media path optimization between endpoints by leveraging a TURN relay.
• BIt allows direct SIP communication between Mobile and Remote Access registered endpoints
• CIt enables the integration of Cisco UCM call services and Cisco Webex Cloud.
• DIt allows media between Mobile and Remote Access registered endpoints through Expressway.

• B
  2% (1)
• C
  4% (2)
• D
  95% (52)

Explanation

ICE (Interactive Connectivity Establishment) is a NAT traversal framework used by endpoints to discover and negotiate the best media path. In Cisco Expressway's ICE passthrough mode, Expressway does not terminate the ICE negotiation itself but instead passes ICE candidate information transparently between endpoints. The primary capability is that media between Mobile and Remote Access (MRA) registered endpoints can flow through Expressway when a direct peer-to-peer media path cannot be established - Expressway acts as the media relay. Option A is incorrect because TURN relay is a component that ICE uses, but ICE passthrough's distinguishing capability is the Expressway relay behavior, not just TURN relay invocation. Option B describes a different feature (call deflection or direct routing between MRA endpoints). Option C describes Expressway's hybrid services connector capability, not ICE.

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