--- service: a.root-servers.net start-period: '2015-10-28T00:00:00Z' end-period: '2015-10-28T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3168188313 dns-udp-queries-received-ipv6: 312200728 dns-tcp-queries-received-ipv4: 21934985 dns-tcp-queries-received-ipv6: 3654591 dns-udp-responses-sent-ipv4: 3176465526 dns-udp-responses-sent-ipv6: 311312541 dns-tcp-responses-sent-ipv4: 18969474 dns-tcp-responses-sent-ipv6: 645607