--- service: i.root-servers.net start-period: '2015-05-31T00:00:00Z' end-period: '2015-05-31T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3063133403 dns-udp-queries-received-ipv6: 228843639 dns-tcp-queries-received-ipv4: 11960828 dns-tcp-queries-received-ipv6: 279805 dns-udp-responses-sent-ipv4: 3014843459 dns-udp-responses-sent-ipv6: 230907770 dns-tcp-responses-sent-ipv4: 11992559 dns-tcp-responses-sent-ipv6: 285781