Network: Cubieboard sports an Ethernet 100M port. No wifi, but you can plug a tiny USB dongle if you need it. * Video: HDMI slot * Sound: Of course HDMI can output sound, but you also get a Jack output. There is also a line in on the Cubie. * USB: 2 ports on Cubieboard. Cubie also has a micro USB female slot * GPIO: you can connect to the real world (e.g. with sensors) with GPIO connectivity.