Which traversal client must be deployed in an enterprise network when Mobile and Remote Access is configured?

Cisco Unified Border Element (CUBE) is a session border controller primarily used for PSTN connectivity or SIP trunking, not as the MRA traversal client.

The Cisco Expressway-C, positioned inside the enterprise network, serves as the traversal client for Mobile and Remote Access (MRA). It registers with Cisco Unified Communications Manager (CUCM) and is responsible for securely relaying signaling and media between internal endpoints and the external Cisco Expressway-E for remote users.

Cisco Expressway-E is deployed in the DMZ and acts as the traversal *server* for MRA, handling connections from the internet to the enterprise network, not as the client.

Cisco IM and Presence (IMP) provides instant messaging and presence services and is not the traversal client for MRA.