This International Standard provides an architectural model of the OSI Network Layer as a framework for OSI Network Layer standardization, allowing incorporation of existing networks within the OSI architecture. This framework encourages the design of real subnetworks that fully support the OSI Network Service whilst accommodating the participation, in the OSI environment, of other subnetworks that do not fully support the OSI Network Service. This International Standard is intended for use both in the design and application of Network Layer protocols, operating between network-entities either in end systems providing the OSI Network Service, or in intermediate systems providing the routeing and relay functions. It shall be used to The organization defined herein does not address Network Layer management; in particular it is not concerned with the relationships among Network Layer entities which may be required for Network Layer management purposes. In addition, this International Standard does not specify the operational requirements for relay functions in intermediate systems, nor address how specific combinations of permitted functions might be practically and efficiently utilized.
CCITT Recommendation X.21 General purpose interface between data terminal equipment and data circuitterminating equipment for synchronous operation on public data networks.
CCITT Recommendation X.25 Interface between data terminal equipment and data circuit-terminating equipment for terminals operating in the packet mode on public data networks.
ISO/TR 8509 lnformation processing Systems — Open Systems lnterconnection — Service conventions.
CCITT Recommendation X.21 General purpose interface between data terminal equipment and data circuitterminating equipment for synchronous operation on public data networks.
CCITT Recommendation X.25 Interface between data terminal equipment and data circuit-terminating equipment for terminals operating in the packet mode on public data networks.
ISO/TR 8509 lnformation processing Systems — Open Systems lnterconnection — Service conventions.
ISO 7498 Information processing Systems — Open Systems lnterconnectjon — Basic Reference Model
ISO 7498/Add. 1 Information processing systems — Open Systems Interconnection — Basic Reference Model Addendum 1 Connectionless-mode transmission.
ISO 8208 Information processing systems — Data communications — X.25 Packet Level Protocol for Data Terminal Equipment.
ISO 8348 Information processing systems — Data communications — Network servicie definition
ISO 8348/Add. 1 Information processing systems — Data communications — Network service definition Addendum 1: Connectionless-mode transmission.
ISO 8802 Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications.1— Part 4, Token-Passing Bus Access Method and Physical Layer Specifications.1— Part 5, Token Ring Access Method and Physical Layer Specifications,1— Part 7, Slotted Ring Access Method and Physical Layer Specifications.1