Which among the following files provides email header information in the Microsoft Exchange server?

You are running through a series of tests on your network to check for any security vulnerabilities.
After normal working hours, you initiate a DoS attack against your external firewall. The firewall Quickly freezes up and becomes unusable. You then initiate an FTP connection from an external IP into your internal network. The connection is successful even though you have FTP blocked at the external firewall. What has happened?

This organization maintains a database of hash signatures for known software.

What operating system would respond to the following command?

Using Linux to carry out a forensics investigation, what would the following command accomplish?
dd if=/usr/home/partition.image of=/dev/sdb2 bs=4096 conv=notrunc,noerror