Convention Meaning special type Indicates a literal example of system output or user input. In text, indicates command names, keywords, node names, file names, directories, utilities, and tools. All numbers are decimal unless otherwise noted. All Ethernet addresses are hexadecimal. A necessary part of any type of problem solving is fault isolation.
Fault isolation is the process used to determine the source of a problem.
Quick and efficient fault isolation is key to resolving network problems. OSI Network Layer Functions Table 1-1 briefly describes the functions of the OSI network layers. 7 Application Contains the application services and supporting protocols that use the lower layers. Allows distributed processing and access. 6 Presentation Coordinates data and data format conversion to meet the needs of individual application processes.