--- service: a.root-servers.net start-period: '2016-12-15T00:00:00Z' end-period: '2016-12-15T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5340538849 dns-udp-queries-received-ipv6: 520380020 dns-tcp-queries-received-ipv4: 218273921 dns-tcp-queries-received-ipv6: 8658121 dns-udp-responses-sent-ipv4: 5332641925 dns-udp-responses-sent-ipv6: 519740136 dns-tcp-responses-sent-ipv4: 218423513 dns-tcp-responses-sent-ipv6: 8622291