This content is 19 years old. I don't routinely update old blog posts as they are only intended to represent a view at a particular point in time. Please be warned that the information here may be out of date.
A few weeks back, I was troubleshooting some DHCP issues and came across Microsoft knowledge base article 259786, which gives a link to a handy reference of DHCP console icons. Unfortunately at the time of writing, the link in the knowledge base article is broken – the DHCP console icons reference is available in the Microsoft Windows Server TechCenter.