A system and method includes stacking a first network node and a second network node on each other, making a surface contact between the network nodes using a first surface connector disposed on an upper surface of a first chassis of the first network node and a second surface connector on a lower surface of the second network node, directly connecting one of the first network node and the second network node to a computer network, and controlling another of the first network node and the second network node to connect the computer network through the surface contact made using the first surface connector and the second surface connector.