--- service: a.root-servers.net start-period: '2013-10-20T00:00:00Z' end-period: '2013-10-20T23:59:59Z' metric: traffic-volume dns-udp-queries-received-ipv4: 1351133453 dns-udp-queries-received-ipv6: 86634961 dns-tcp-queries-received-ipv4: 6151012 dns-tcp-queries-received-ipv6: 1481137 dns-udp-responses-sent-ipv4: 1349148267 dns-udp-responses-sent-ipv6: 86648188 dns-tcp-responses-sent-ipv4: 6680180 dns-tcp-responses-sent-ipv6: 17449