No abstract

Networking in computer science is the connection of two or more computers electronically with the sole aim of data or peripheral sharing. As the computers and peripherals connected to a network increases, using routers and switches alone is no longer reliable to contain broadcast traffic. Therefore this research employed VLAN technology to improve the performance of an extended star network topology by dividing a single switching network into a number of overlaying virtual networks called VLANs that can accommodate various functionalities, security needs and easy administration. For Inter-VLAN routing, a layer 3 switch that support 802.1Q trunking on a fast Ethernet or GigabitEthernet interface was used. This study is conducted using a white-box approach and the waterfall methodology to design, simulate and compare. After configuration, it was seen that the presence of failure in the main network is abstracted from the network users as the VLANS is configured logically to access and share resource with systems on all blocks. Subsequently, A ring topology can be introduced to the system were each block will have a backup switch and can serve as a backup for the block nearest to it. Also a Dual ISP can be introduced to provide steady internet access.

The intent of this paper is to define a common case study for the domain-specific modeling research community. The domain of the case study is oil and gas pipeline design management systems, i.e., systems that help in identifying, handling, and controlling a pipeline design task by coordinating the communication between all component models and dimensions involved in handling the design, by allocating and managing resources, and by providing access to relevant designrelated information to domain experts. This document contains general informal requirements for a pipeline design management systems (PDMSs), a feature model for the PDMS product line, and a domain model for the PDMS, as well as an informal physical pipeline model of the PDMS. Domain specific modeling researchers who want to demonstrate the power of their technique can hence apply the approach in other related areas at the most appropriate level of abstraction in the domain of pipeline engineering.

Domain specific modeling methodology employed in this solution provides abstractions in the problem domain that expresses designs in terms of concepts in the application domain. Presented in this paper therefore is a metamodelling tool, an integrated platform which offers layered collections of reusable software primitives whose semantics are familiar only to engineering design mechanisms. It is intended to eliminate the complexities associated with the domain of computing technologies such as CAD systems where the focus is solely on engineering designs expertise in the software systems logic. This tool which was built on the DSL processor engine that compiles the DSL Builder files at the core will enable non design experts to be able to evolve designs specific to their domains of operations and reflecting their view points. At the Development Interface, the templates are created for every transformation added to our model that can be applicable in the physical design of objects in the engineering industry. It will in line remove hassles and complexities of expertise centric design platforms to produce artifacts that will help engineers manage very complex design concepts.

Domain specific modeling services, especially when made available to pipeline systems that transport oil and gas, constitute an interesting but very challenging domain. It poses fundamental problems for requirements engineering, software architecture, and their relationship. We propose a novel, domain-based framework for requirements engineering for this class of applications. The framework addresses the key concepts in this field, such as changing complexities for design platforms and domain specific requirements. We report experimental lessons learned on this framework and suggest requirements analysis products for documentation and future system design directions.