Novel genes expressed selectively by long-term dendritic cell lines from murine epidermis which retain important features of resident epidermal Langerhans cells are provided. The computer includes a memory, a wired network media access circuit for accessing a wired network, and a wireless network media access circuit, connected to the wired network media access circuit through a specific interface, for accessing a wireless network. The method includes initiating a communication exchange between at least one of the initiators and the SAN, the exchange including transmission of a command frame.