--- service: i.root-servers.net start-period: '2013-04-26T00:00:00Z' end-period: '2013-04-27T00:00:02Z' metric: traffic-volume dns-udp-queries-received-ipv4: 2058440152 dns-udp-queries-received-ipv6: 111134495 dns-tcp-queries-received-ipv4: 4799671 dns-tcp-queries-received-ipv6: 140202 dns-udp-responses-sent-ipv4: 2072337129 dns-udp-responses-sent-ipv6: 117448581 dns-tcp-responses-sent-ipv4: 4840252 dns-tcp-responses-sent-ipv6: 141032