An engineer has configured a DNS virtual server on a NetScaler appliance but the monitors are showing DOWN
and DNS resolution is failing.
Which of the following should the engineer check?

A.
Port 53 between the VIP address and the DNS servers is allowed

B.
That a ADNS_TCP service has been configured on the NetScaler

C.
That the load balancing feature has been enabled on the NetScaler

D.
Port 53 between the NSIP address and the DNS servers is allowed

E.
Port 53 between the SNIP address and the DNS servers is allowed