--- service: i.root-servers.net start-period: '2015-01-05T00:00:00Z' end-period: '2015-01-06T00:00:07Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3136249852 dns-udp-queries-received-ipv6: 231654075 dns-tcp-queries-received-ipv4: 8430397 dns-tcp-queries-received-ipv6: 222299 dns-udp-responses-sent-ipv4: 3108283463 dns-udp-responses-sent-ipv6: 231580472 dns-tcp-responses-sent-ipv4: 8626591 dns-tcp-responses-sent-ipv6: 223996