--- service: a.root-servers.net start-period: '2015-07-04T00:00:00Z' end-period: '2015-07-04T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 4054519098 dns-udp-queries-received-ipv6: 343513341 dns-tcp-queries-received-ipv4: 34502580 dns-tcp-queries-received-ipv6: 10402092 dns-udp-responses-sent-ipv4: 4091605848 dns-udp-responses-sent-ipv6: 345825352 dns-tcp-responses-sent-ipv4: 29442790 dns-tcp-responses-sent-ipv6: 8553757