--- service: a.root-servers.net start-period: '2013-12-27T00:00:00Z' end-period: '2013-12-27T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1286987404 dns-udp-queries-received-ipv6: 50618389 dns-tcp-queries-received-ipv4: 6754017 dns-tcp-queries-received-ipv6: 699167 dns-udp-responses-sent-ipv4: 1284505211 dns-udp-responses-sent-ipv6: 50625224 dns-tcp-responses-sent-ipv4: 6909567 dns-tcp-responses-sent-ipv6: 58