300-085 Question #131: Real Exam Question with Answer & Explanation

The correct answer is A: Cisco VCS Expressway. Cisco VCS Expressway is the purpose-built external traversal server that allows Cisco Jabber clients to securely subscribe to UC services from outside the corporate network without a VPN.

Question

Which product enables a Cisco Jabber client to securely subscribe externally?

Options

ACisco VCS Expressway
BCisco VCS Control
CCisco TMS
DCisco Unified Communications Manager

Explanation

Cisco VCS Expressway is the purpose-built external traversal server that allows Cisco Jabber clients to securely subscribe to UC services from outside the corporate network without a VPN.

Common mistakes.

B. Cisco VCS Control is the internal-facing registration server for endpoints inside the corporate network and cannot provide secure access for external clients.
C. Cisco TMS is a scheduling and management platform for TelePresence infrastructure and does not function as a remote access or security traversal gateway.
D. Cisco Unified Communications Manager handles internal call control and registration but does not provide firewall traversal or secure external access for remote Jabber clients.

Concept tested. Cisco VCS Expressway enabling secure external Jabber access

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-6/exwy_b_mra-expressway-deployment-guide.html

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