- File Access, Command Terminals

- Host Services, Network Control

- Task-To-Task Communication

- Adaptative Routing

- Host Services

- Packet Transmission/Reception

DNA LAYERS DNA PROTOCOLS

USER User Protocol

NETWORK APLICATION Data Acess Protocol(DAP) e outros

SESSION CONTROLER Session Control Protocol

END COMMUNICATION Network Services Protocols(NSP)

ROUTING Routing Protocol

DATA LINK DDCMP,ETHERNET,CI,X.25

PHYSICAL LINK DDCMP,ETHERNET,CI,X.25