A presales engineer is working on a quote for a major customer and must evaluate how many Cisco VCS Expressway traversal call licenses for which to plan. Calls to and from which three routes must the engineer include in the tally? (Choose three.)
A. gateway
B. Cisco 9971 Endpoint
C. border controllers
D. gatekeeper
E. SIP trunk
F. VCS
For a VCS Expressway, calls to or from a traversal client (Firewall traversal calls). Traversal clients include other VCSs, gatekeepers, Border Controllers, or traversal-enabled endpoints.
correct answer is C, D, F
https://www.cisco.com/c/en/us/support/docs/unified-communications/telepresence-video-communication-server-vcs/118872-technote-vcs-00.html
This is the correct answer: VCS, Gatekeeper Boarder controller as verified by this linkhttps://www.cisco.com/c/en/us/support/docs/unified-communications/telepresence-video-communication-server-vcs/118872-technote-vcs-00.html