--- service: a.root-servers.net start-period: '2016-05-28T00:00:00Z' end-period: '2016-05-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3931024397 dns-udp-queries-received-ipv6: 242040786 dns-tcp-queries-received-ipv4: 61676019 dns-tcp-queries-received-ipv6: 3181226 dns-udp-responses-sent-ipv4: 3931060961 dns-udp-responses-sent-ipv6: 241875753 dns-tcp-responses-sent-ipv4: 52329825 dns-tcp-responses-sent-ipv6: 218476