MTR

mtr is another implementation of trace route, it is included with most recent Linux distros.
There is also a port for windows which can be found at http://winmtr.sourceforge.net/.

Here is the man page.

MTR(8)
NAME
mtr - a network diagnostic tool.

SYNOPSIS
mtr [-hvrctglsni] [--help] [--version] [--report] [--report-cycles COUNT][--curses] [--split] [--raw] [--no-dns] [--gtk] [--address IP.ADD.RE.SS][--interval SECONDS] [--psize BYTES -p BYTES] HOSTNAME [PACKETSIZE]

DESCRIPTION
mtr combines the functionality of the traceroute and ping programs in a single Network diagnostic tool.
As mtr starts, it investigates the network connection between the host mtr runs on and HOSTNAME. By sending packets with purposly low TTLs. It continues to send packets with low TTL, noting the response time of the intervening routers.This allows mtr to print the response percentage and response times of the internet route to HOSTNAME. A sudden increase in packet loss or response time is often an indication of a bad (or simply overloaded) link.

OPTIONS
-h --help - Print the summary of command line argument options.
-v --version - Print the installed version of mtr.
-r --report - This option puts mtr into report mode.

When in this mode, mtr will run for the number of cycles specified by the -c option, and then print statistics and exit. This mode is useful for generating statistics about network quality. Note that each running instance of mtr generates a significant amount of network traffic. Using mtr to measure the quality of your network may result in decreased network performance.

-c COUNT --report-cycles

COUNT Use this option to set the number of pings sent to determine both the machines on the network and the reliability of those machines. Each cycle lasts one second. This option is only useful with the -r option.