--- service: i.root-servers.net start-period: '2015-01-01T00:00:00Z' end-period: '2015-01-02T00:00:10Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3124643983 dns-udp-queries-received-ipv6: 226683029 dns-tcp-queries-received-ipv4: 14120565 dns-tcp-queries-received-ipv6: 289513 dns-udp-responses-sent-ipv4: 3107539253 dns-udp-responses-sent-ipv6: 226617259 dns-tcp-responses-sent-ipv4: 14234886 dns-tcp-responses-sent-ipv6: 279770