Which service is NOT typically provided by the Presentation Layer?

The Presentation Layer is responsible for preparing and translating data for the application layer, which includes the transformation of data into a format that the application can understand. Key functions of the Presentation Layer include data representation (such as conversion between different data formats, character sets, and ensuring proper syntax) as well as data encryption (to secure the data being transmitted) and data compression (to reduce the size of the data for more efficient transmission).

Data segmentation, however, is primarily a function associated with the Transport Layer. This layer is tasked with dividing a data stream into smaller packets for transmission across the network and reassembling those packets upon receipt. As such, while the Presentation Layer focuses on the format and presentation of the data, segmentation of the data into packets for delivery is not its responsibility. Therefore, identifying data segmentation as a service not typically provided by the Presentation Layer aligns with its defined roles within the OSI model.