--- service: i.root-servers.net start-period: '2016-03-28T00:00:00Z' end-period: '2016-03-29T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4969336061 dns-udp-queries-received-ipv6: 413077491 dns-tcp-queries-received-ipv4: 21274380 dns-tcp-queries-received-ipv6: 830937 dns-udp-responses-sent-ipv4: 4834978784 dns-udp-responses-sent-ipv6: 423216069 dns-tcp-responses-sent-ipv4: 19729359 dns-tcp-responses-sent-ipv6: 839483