--- service: i.root-servers.net start-period: '2016-01-16T00:00:00Z' end-period: '2016-01-17T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4327473864 dns-udp-queries-received-ipv6: 343747124 dns-tcp-queries-received-ipv4: 23369662 dns-tcp-queries-received-ipv6: 839743 dns-udp-responses-sent-ipv4: 4268070778 dns-udp-responses-sent-ipv6: 347171563 dns-tcp-responses-sent-ipv4: 23470287 dns-tcp-responses-sent-ipv6: 845231