What are three features of Cisco Unified Border Element? (Choose three.)

CUBE hides internal network topology by rewriting SIP headers such as Via, Record-Route, and Contact, preventing external parties from seeing private IP addressing schemes.

Automated Alternate Routing is a Cisco Unified Communications Manager feature that reroutes calls over PSTN when IP WAN bandwidth is insufficient, not a CUBE feature.

Bandwidth control as a standalone feature belongs to call admission control mechanisms in CUCM or RSVP-based QoS, not to CUBE's primary feature set.

CUBE supports video integration by handling video codec negotiation and transporting video media streams, enabling video calls between internal UC infrastructure and external SIP trunks.

CUBE performs protocol interworking by translating between SIP and H.323 and normalizing SIP dialects from different vendors, enabling interoperability between disparate voice and video systems.

Admission Request messages are part of H.323 gatekeeper CAC signaling between H.323 endpoints and a gatekeeper, not a defining feature of CUBE.