Itrace is a fairly simple tool so this will be short and sweet. Itrace is a program that implements traceroute functionality using ICMP echo request packets. Therefore, it looks like you are just pinging your target while you traceroute there. It often helps tracing behind firewalls.
The below is part of the output when receiving an error attempting to install the Perl DBD::mysql module using the CPAN shell. I rarely use the Perl CPAN shell since most of the packages are available on CentOS, my typical Linux distribution choice for servers, using the yum package manager. In this case I was working on installing Monarch on a server at work to assist with Nagios file management. Monarch allows you to backup the entire Nagios configuration files with the click of a button. Monarch will also provide a visual view of any Nagios build errors, Nagios configuration files (including users, user groups, services, check commands, etc.,), and more. So when attempting to build the Perl DBD:mysql module via the CPAN shell I received some errors which I initially did not understand because they did not explain the specific issue however I eventually located the problem which ended up being easy to resolve. Below I describe the error in detail as well as information on how to resolve.