The present invention relates to the field of communications, in particular, to a server for solving the problem related to the incompatibility between normal blades and multi-processing blades in a conventional server. The server according to an embodiment of the invention includes a backboard, on which backboard wiring and a first slot are disposed. At least two second slots are further disposed on the backboard. Both a first interface configured to be connected to a normal blade and a second interface configured to be connected to a multi-processing blade are disposed on each of the second slots, the first interface being connected to a corresponding Cluster Switch interface disposed on the first slot via the backboard wiring, and the second interface being interconnected directly via the backboard wiring or being connected to a corresponding Symmetrical Multi-Processing Switch interface disposed on the first slot via the backboard wiring.