.PL DNS servers handled more than 300 billion queries in last 12 months (September 2007 - August 2008).
Despite the high number of handled queries, .PL servers are ready to handle much higher load than average today. Unfortunately, for security reasons I can not disclose information of the maximum capacity of the DNS servers.
It's important to add that thanks to .PL Registry investments in the DNS infrastructure, our "computing resurces" are spread across 23 geographic locations in Poland and abroad. If you are interested in the details, please take a look at the map of the (approximated) existing locations of our Secondary Names Servers.
The main reason NASK invests in the infrastructure is the protection against Distributed Denial of Service attacks. For more about DDoS attack, please take a look here. Increasing the computational resources (bandwidth, "processor time" etc.) is the easiest and most efficient method to counteract DDoS.
Thanks to the excess of the computing power and available bandwidth plus geographical disperse of the servers, hipothetical DDoS attack against one or few .PL DNS servers do not cause the overall failure of the DNS and queries still can be handled uninterrupted.
Polish version of the blog is here.
