According to an aspect of the invention, there is provided a management device used in a network to which nodes are connected. The management device includes an information requesting unit to send out a request packet requesting address information concerning addresses of each node through the network while using a predetermined single protocol, an information receiving unit to receive the address information retuned from each node as a response to the request packet, and an information displaying unit to display addresses contained in the received address information such that if two or more addresses are in the address information received from a single node, the two or more addresses are treated as addresses belonging to the single node.