Design and Implementation of Software Protocol in VAX/VMS Using Ethernet Local Area Network

摘要

This thesis presents the design and implementation of a software protocol for the VAX-11/780, under the VMS operating system, to allow message and file transfer to and from the INTELIEC MDS system, under CP/M-80 operating system, via the Ethernet local area network. The design of this software protocol is based on the protocol hierarchies where the network is organized as a series of layers or levels, each one build upon its predecessor. The purpose of each layer is to offer certain services to the higher layers, shielding those layers from the details of how the offered services are actually implemented. With this design concept, the desired software protocol will be transportable in the sense that it can be used by different kinds of computer systems with minimal modifications. The Ethernet local area network is also designed in this same highly structured way. (Author)