--- service: a.root-servers.net start-period: '2017-01-11T00:00:00Z' end-period: '2017-01-11T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4865163459 dns-udp-queries-received-ipv6: 498139960 dns-tcp-queries-received-ipv4: 132909028 dns-tcp-queries-received-ipv6: 10508072 dns-udp-responses-sent-ipv4: 4853983423 dns-udp-responses-sent-ipv6: 497978175 dns-tcp-responses-sent-ipv4: 133272821 dns-tcp-responses-sent-ipv6: 10531981