--- service: a.root-servers.net start-period: '2015-04-05T00:00:00Z' end-period: '2015-04-05T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2467471821 dns-udp-queries-received-ipv6: 209603692 dns-tcp-queries-received-ipv4: 20772031 dns-tcp-queries-received-ipv6: 3169686 dns-udp-responses-sent-ipv4: 2451556575 dns-udp-responses-sent-ipv6: 208757832 dns-tcp-responses-sent-ipv4: 16492964 dns-tcp-responses-sent-ipv6: 1635042