--- service: j.root-servers.net start-period: '2015-01-19T00:00:00Z' end-period: '2015-01-19T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 3487905307 dns-udp-queries-received-ipv6: 255462125 dns-tcp-queries-received-ipv4: 28761976 dns-tcp-queries-received-ipv6: 5623419 dns-udp-responses-sent-ipv4: 3487169161 dns-udp-responses-sent-ipv6: 255459016 dns-tcp-responses-sent-ipv4: 28963970 dns-tcp-responses-sent-ipv6: 4841466