Which component pair is responsible for firewall traversal and secure remote access for endpoints in Cisco collaboration?

Which component pair is responsible for firewall traversal and secure remote access for endpoints in Cisco collaboration?

• A. Expressway-C/Expressway-E pair.
• B. Cisco Unity Connection.
• C. CUCM Publisher.
• D. Cisco ASA Firewall.

Answer: (A)

Firewall traversal and secure remote access for endpoints in Cisco collaboration is provided by the Cisco Expressway pair. Expressway-E sits at the internet edge, while Expressway-C lives inside the network and connects to the call control and IM&P services. Together they form the Collaboration Edge, enabling endpoints that are outside the corporate LAN to register, signaling, and media-path negotiate with internal servers without needing a VPN. They handle traversal across NATs and firewalls, using secure signaling (TLS) and media traversal, so remote Jabber clients and other endpoints can securely reach your CUCM, IM&P, and related services. The other options don’t serve this edge traversal role: Unity Connection is a voicemail system, CUCM Publisher is the core call-control server, and Cisco ASA is a general-purpose firewall not the dedicated collaboration-edge pair.

Firewall traversal and secure remote access for endpoints in Cisco collaboration is provided by the Cisco Expressway pair. Expressway-E sits at the internet edge, while Expressway-C lives inside the network and connects to the call control and IM&P services. Together they form the Collaboration Edge, enabling endpoints that are outside the corporate LAN to register, signaling, and media-path negotiate with internal servers without needing a VPN. They handle traversal across NATs and firewalls, using secure signaling (TLS) and media traversal, so remote Jabber clients and other endpoints can securely reach your CUCM, IM&P, and related services. The other options don’t serve this edge traversal role: Unity Connection is a voicemail system, CUCM Publisher is the core call-control server, and Cisco ASA is a general-purpose firewall not the dedicated collaboration-edge pair.