Prerequisite, CPSC 231. Students explore the principles and techniques of data communications and give special emphasis to networks and distributed systems. The I.S.O. Reference Model for open systems interconnection will be investigated and the function and operation of each protocol layer analyzed in detail. (Offered fall semester.) 3 credits. Enrollment Requirements: Take CPSC-231 300 Level require 30 GRADED credits, or signatures of instructor and chair.