--- service: i.root-servers.net start-period: '2015-01-23T00:00:00Z' end-period: '2015-01-24T00:00:12Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3342390716 dns-udp-queries-received-ipv6: 239430274 dns-tcp-queries-received-ipv4: 6844399 dns-tcp-queries-received-ipv6: 211546 dns-udp-responses-sent-ipv4: 3317179379 dns-udp-responses-sent-ipv6: 240407673 dns-tcp-responses-sent-ipv4: 6876511 dns-tcp-responses-sent-ipv6: 217340