NTTCP (New TTCP) times the transmission and reception of data between two systems using the UDP or TCP protocols. It differs from common ``blast'' tests, which tend to measure the remote inetd as much as the network performance, and which usually do not allow measurements at the remote end of a UDP transmission. The following is a short list of the improvements which have been made over "classic" TTCP: * Ported to a variety of operating systems * Can be started via inetd * Output can be customized on the commnad line * Centralized reporting of the measurements * Traffic checksumming to detect failures in UDP transmissions * Multicast support