--- service: a.root-servers.net start-period: '2016-05-13T00:00:00Z' end-period: '2016-05-13T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 8349588223 dns-udp-queries-received-ipv6: 550147658 dns-tcp-queries-received-ipv4: 76208989 dns-tcp-queries-received-ipv6: 4902337 dns-udp-responses-sent-ipv4: 8349765300 dns-udp-responses-sent-ipv6: 550382616 dns-tcp-responses-sent-ipv4: 64637948 dns-tcp-responses-sent-ipv6: 312256