Single board and network equipment

The application discloses a single board and network equipment, and belongs to the technical field of a network. The single board comprises a bearing plate, a first heat dissipation assembly and an optical cage arranged on the bearing plate; the optical cage is provided with at least one layer of optical module interfaces; each layer of optical module interfaces comprises at least one optical module interface; each optical module interface is configured to assemble an optical module; the first heat dissipation assembly comprises a first cold plate and a first protrusion structure arranged on the first cold plate; the first cold plate is configured to be pressed against a first optical module by the first protrusion structure; and the first optical module is an optical module assembled in one layer of optical module interfaces in the optical cage, which is the closest to the bearing plate. The single board is helpful for solving a problem of poor heat dissipation effect of the optical module and the single boa