How are firewall traversal connections established between the Cisco TelePresence VCS
Expressway and Control?

A.
The traversal server establishes connections inbound to the traversal client.

B.
Connections are established in both directions from the traversal server to the traversal
client.

C.
The traversal server negotiates acceptable connection ports with the firewall.

D.
The traversal client establishes connections outbound to the traversal server.