[RFC 2018] TCP Selective Acknowledgment Options.
[RFC 2330] Framework for IP Performance Metrics.
[RFC 2498] IPPM Metrics for Measuring Connectivity.
[RFC 2678] IPPM Metrics for Measuring Connectivity.
[RFC 2883] An Extension to the Selective Acknowledgement (SACK) Option for TCP.
[RFC 3819] Advice for Internet Subnetwork Designers.