BS 7221:1989
Current
The latest, up-to-date edition.
Open systems interconnection: specification for internal organization of the Network Layer
Hardcopy , PDF
English
12-31-1989
National foreword
Committees responsible
Specification
0 Introduction
1 Scope and field of application
2 References
3 Definitions
4 Abbreviations
5 Network Layer concepts and terminology
6 Organization of the Network Layer
7 Application of the Network Layer Internal
organization
8 Interconnection scenarios
Tables
1 Correspondence between real world objects and
abstract elements
2 Summary of interconnection scenarios
Figures
1 "Direct" communication between end systems (without
an intermediate system)
2 End systems communicating through an intermediate
system
3 Interconnection of real subnetworks that include
integral interworking unit functionality
4 Interconnection of real subnetworks by a separate
interworking unit
5 Relationship between subnetwork service and data
transmission service
6 Network Layer protocol rules
7 Provision of CO-NS or CL-NS over a single data-link
8 Provision of CO-NS or CL-NS over a single subnetwork
9 Interconnection of subnetworks utilizing a single NL
protocol to provide the CO-NS or CL-NS over two CO-
or CL- subnetworks
10 Provision of the CO-NS over two CO- subnetworks
using hop-by-hop harmonization
11 Provision of the CO-NS over two CL- subnetworks
using an internetworking protocol approach
12 Provision of the CL-NS over two CL- subnetworks
using hop-by-hop harmonization
13 Provision of the CL-NS over two CL- subnetworks
using an internetworking protocol approach
14 Provision of the CL-NS over two CO- subnetworks
using hop-by-hop harmonization
15 Provision of the CL-NS over two CO- subnetworks
using an internetworking protocol approach
16 Provision of the CO-NS over two CL- subnetworks
using hop-by-hop harmonization
17 Provision of the CO-NS over two CL- subnetworks
using an internetworking protocol approach
18 Provision of the CL-NS over a CL- subnetwork and a
CO- subnetwork using hop-by-hop harmonization
19 Provision of the CL-NS over a CL- subnetwork and a
CO- subnetwork using an internetworking protocol
approach
20 Provision of the CO-NS over a CL- subnetwork and a
CO- subnetwork using hop-by-hop harmonization
21 Provision of the CO-NS over a CL- subnetwork and a
CO- subnetwork using an internetworking protocol
approach
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