--- service: i.root-servers.net start-period: '2015-01-17T00:00:00Z' end-period: '2015-01-18T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2882024075 dns-udp-queries-received-ipv6: 222017086 dns-tcp-queries-received-ipv4: 6324982 dns-tcp-queries-received-ipv6: 201323 dns-udp-responses-sent-ipv4: 2861392643 dns-udp-responses-sent-ipv6: 221949726 dns-tcp-responses-sent-ipv4: 6369065 dns-tcp-responses-sent-ipv6: 210362