--- service: i.root-servers.net start-period: '2016-01-13T00:00:00Z' end-period: '2016-01-14T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2957453269 dns-udp-queries-received-ipv6: 246153563 dns-tcp-queries-received-ipv4: 10888649 dns-tcp-queries-received-ipv6: 521595 dns-udp-responses-sent-ipv4: 2916906049 dns-udp-responses-sent-ipv6: 248167784 dns-tcp-responses-sent-ipv4: 10939615 dns-tcp-responses-sent-ipv6: 529363