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The TCP/IP Guide  9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)       9  Name Systems and TCP/IP Name Registration and Name Resolution            9  Name System Issues, Concepts and Techniques

Name System Overview and Motivation 1 2 Name Spaces and Name Architectures (Flat and Hierarchical)

Relationships Between Name System Functions

The name space is more of a “descriptive” function; it is a definition of how names work in the system. Name registration and resolution are more “active” functions, with each name system including one or more specific procedures for how these jobs are carried out. Name registration and resolution are in some ways complements of each other, so certain registration techniques are most often associated with particular resolution methods. In turn, the types of registration and resolution methods that are possible depends on the name space and in particular its architecture. These relationships are shown in simplified form in Figure 231.

The processes of registration and resolution can be either quite plain or fairly complicated, depending on the type of name system used. Simple name systems are largely manual in operation, easy to understand and best used in smaller networks. Larger, more complex networks and internetworks require more sophisticated methods of registration and resolution, which work with less need for administrator intervention and scale better as new machines are added to the network.

I should also point out that while I consider name registration and name resolution as “functions” at the highest level, they are probably better thought of as sets of functions. Name registration is necessarily tied into issues such as name system administration and management, and understanding resolution requires that we look at a number of important implementation issues in the areas of efficiency and reliability. The next few topics expand on this overview by considering each of these three functions in more detail.

Name System Overview and Motivation 1 2 Name Spaces and Name Architectures (Flat and Hierarchical)