--- service: i.root-servers.net start-period: '2013-09-05T00:00:00Z' end-period: '2013-09-06T00:00:04Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2448274083 dns-udp-queries-received-ipv6: 151910687 dns-tcp-queries-received-ipv4: 5533054 dns-tcp-queries-received-ipv6: 234025 dns-udp-responses-sent-ipv4: 2403629319 dns-udp-responses-sent-ipv6: 151908400 dns-tcp-responses-sent-ipv4: 5507686 dns-tcp-responses-sent-ipv6: 235561