Match each definition with the apprepriate model layer.

Provides services to exchange the individual pieces of data over the network between identified end devices.

Describes methods for exchanging data frames between devices over common media.

Describes the mechanical, electrical, functional, and procedural means to activate, maintain, and deactivate connections for bit transmission to and from a network device.

Defines services to segment, transfer, and reassemble data for individual communications between end devices.

Provides the means for end$-$to$-$end connectivity between individuals in the human network using data networks.