--- service: i.root-servers.net start-period: '2014-12-31T00:00:00Z' end-period: '2015-01-01T00:00:06Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2648869400 dns-udp-queries-received-ipv6: 207754242 dns-tcp-queries-received-ipv4: 6372101 dns-tcp-queries-received-ipv6: 187990 dns-udp-responses-sent-ipv4: 2629447117 dns-udp-responses-sent-ipv6: 207707033 dns-tcp-responses-sent-ipv4: 6528245 dns-tcp-responses-sent-ipv6: 191848