--- service: a.root-servers.net start-period: '2017-01-04T00:00:00Z' end-period: '2017-01-04T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4554001368 dns-udp-queries-received-ipv6: 492743986 dns-tcp-queries-received-ipv4: 177237835 dns-tcp-queries-received-ipv6: 7525604 dns-udp-responses-sent-ipv4: 4550526804 dns-udp-responses-sent-ipv6: 492479930 dns-tcp-responses-sent-ipv4: 178148653 dns-tcp-responses-sent-ipv6: 7561541