--- service: a.root-servers.net start-period: '2016-12-29T00:00:00Z' end-period: '2016-12-29T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4414241879 dns-udp-queries-received-ipv6: 468358139 dns-tcp-queries-received-ipv4: 171038563 dns-tcp-queries-received-ipv6: 7222692 dns-udp-responses-sent-ipv4: 4411691486 dns-udp-responses-sent-ipv6: 468171180 dns-tcp-responses-sent-ipv4: 171805671 dns-tcp-responses-sent-ipv6: 7224380