Scenario: The XenApp farm consists of two zones, each located in a different datacenter. After some recent maintenance by the network team, the administrator discovers that the load balancing across…

Scenario: The XenApp farm consists of two zones, each located in a different datacenter. After some recent maintenance by the network team, the administrator discovers that the load balancing across the datacenters is NOT working. The most likely cause for the load balancing issue is that the firewall has started blocking the __________. (Complete the sentence with the correct option.)