Low cost deployment
Using local memory of GGSN/PGW as DNS cache, no more additional HW expense.
Reducing service delay
DNS local hit response latency dropped by an average of 2 orders of magnitude, the average latency dropped by 20ms, and the overall service latency dropped by nearly 50%
Reducing firewall load
The number of firewall DNS packet sessions dropped by three-quarters, and the overall firewall sessions dropped by 15%