PLC adapter readily establishes a home network using its electrical wiring as a high-speed large-capacity communication line. This PLC adapter allows the use of a 4-port LAN, making it easy to connect multiple devices to the Internet. The adapter is plugged in directly to an electrical outlet, thus the adapter is designed to naturally fit in with the domestic environment. The round top face clears the way for easy access for the other electrical socket. The adapter is designed with ease of use in mind, including a texture pattern on the sides to make it easier to plug and unplug.