You have discovered that your company has suffered a security breach, and it seems that some sensitive client information has been stolen by unidentified individuals. You have no way of knowing...

You have discovered that your company has suffered a security breach, and it seems that some sensitive client information has been stolen by unidentified individuals. You have no way of knowing whether it was an internal or external attack. When monitoring your network traffic, keep the following points in mind:
Give an outline of the types of traffic you will be looking at in order to establish where and when the attack occurred.