Department: Information Systemsc. a software that consists of a set of rules d$.$ describes how to transmit or exchange data, especially across a network. layers that the message has to pass by till it arrives to local network as shown in the figure are a$.$ application layer, transport layer, internet layer b$.$ application layer, internet layer, transport layer c$.$ transport layer, application layer, internet layer d$.$ transport layer, internet layer, application layer nodes are connected by each of which can carry one or more a$.$ links, channels b$.$ physical entity, logical entity c$.$ capacity, bandwidth d$.$ both a$,$b A dedicated channel is established between the sender and receiver for the duration of the session is definition for: a$.$ example of messaging schemes b$.$