--- service: i.root-servers.net start-period: '2013-12-31T00:00:00Z' end-period: '2014-01-01T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2114053568 dns-udp-queries-received-ipv6: 132358879 dns-tcp-queries-received-ipv4: 4874676 dns-tcp-queries-received-ipv6: 243331 dns-udp-responses-sent-ipv4: 2065392087 dns-udp-responses-sent-ipv6: 132489504 dns-tcp-responses-sent-ipv4: 4930220 dns-tcp-responses-sent-ipv6: 246532