DNS responses from simulated zones (2) 82,891 second level domain (SLD) zones, each contains: 1 SOA record with fictitious values 2 NS records, 2 glue (A) records some number of A records for hosts in the zone both NS and A records match those in the parent zone (TLD) file 24-hour TTLs name server IP addresses from a pool of 254 addresses allocated sequentially, wrap around as needed A records for hosts in the SLD zone have random IP addresses 12-hour TTLs