Provided are an electronic device and operating method, which includes a first operation, performed when the electronic device is not connected to an external output device, including displaying a first screen including a plurality of icons representing a plurality of application programs in a first format, and a second operation, performed when the electronic device is inserted into an external docking device for connecting to the external output device, including rendering a second screen including a plurality of icons displayed in the second format while the external docking device is connected to a wired local area network (LAN), and providing data associated with the second screen using the connector, and connecting the electronic device to the wired LAN through the connector using a first media access control address shared with the external device on the wired LAN.