Covers such areas as determining an optimum line rate to interconnect separate networks, estimating network traffic for networks to be installed but for which no prior traffic appraisal exists and calculating the effect upon performance of Ethernet and Token-Ring networks as those network configurations change. Mathematical models of various LAN performance issues are developed throughout the text enabling readers to determine answers to their specific networking needs. Includes several QuickBASIC programs to facilitate computations (available on a 3.5 inch IBM PC compatible disk).