300-085 · Question #131
Which product enables a Cisco Jabber client to securely subscribe externally?
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
How the community answered
(42 responses)- A93% (39)
- B5% (2)
- D2% (1)
Why each option
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.
VCS Expressway sits in the DMZ and provides firewall traversal for external Jabber clients by working in tandem with VCS Control on the internal network - together they form the Expressway-E and Expressway-C architecture. It handles secure signaling and media traversal, enabling Jabber to subscribe to presence and initiate calls externally. This is Cisco's designated solution for mobile and remote access without requiring a VPN client.
Cisco VCS Control is the internal-facing registration server for endpoints inside the corporate network and cannot provide secure access for external clients.
Cisco TMS is a scheduling and management platform for TelePresence infrastructure and does not function as a remote access or security traversal gateway.
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
Source: 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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