Scale Distributed Computing and Applications †MyAssignmenthelp.com

Question: Discuss about the Scale Distributed Computing and Applications. Answer: Introduction: When a system is proposed that requires strong authentication and authorization then multi-tier client server architecture is most preferred and effective. In this model handling of application is done at the client and functions data management is done at the server. Management of data is performed right-on and thus, interaction handling between application processing and the clients is not necessary. In multi-tier architecture application modules are separated and subdivided into several tiers depending on their functionalities. Every tier basically executes on different systems. This offers distribution and, therefore, doing away with the disadvantage of single point failure. As compared to single or two-tier, security of applications and data is higher in multi-tier architecture (Helmer, Poulovassilis, Xhafa, 2011). Single point of failures is eliminated in the application. Utilization of load balancer in the distribution of traffic across several web servers aids in removal of single point failure. Provides high level security: deployment of many tiers assists in enhancing data and application security. Attackers are limited by the absence of point of failures, therefore, their ability to take control over data and applications have been narrowed. The possibility of clients interacting with unauthorized data has been greatly reduced as clients dont to access the database directly. Diverse networks have distinctive security needs which limits how an end user interacts with the server. For instance, if an end user is connected to the internet, their communication with the servers is regulated by a firewall. The existence of a firewall that is not under the manipulation of a client restricts the selection of the protocols to use. several firewalls are set up to enable HTTP (hypertext transfer protocol) to go through them and not IIOP (internet inter-orb protocol). (Singh, 2011). Authentication is also influenced by security requirements. Authentication of users if a client and server are within similar security domain like an intranet of company as compared where they are on different domains like over the internet which requires more sophisticated scheme for logging in (Vogel, Arnold, Chughtai, Kehrer, 2011). According to Qian (2010),functionality of the multi-tier Architecture is considered unique as it is subdivided into 3 logical modules including; application, business management and data services. These logical modules can be mapped into three or several physical nodules. Application services- the general functionality of this module is more of the user interface and presentation needs and is run on the client side, that is, it is run on the clients desktop/ browser which support widowing operating platform. modifications in functionality is determined by the simplicity of use or creative considerations, basically human factors. Data services are deployed using the technologies of database servers, which is likely to be run on high bandwidth and immense performance stations that handle a lot of clients interconnected over a network. Data services are likely to be modified when relationship among stored data and representation changes. Business services mirror the encrypted information about business processes. They handle and incorporate data received from the data services and make it available to application services. Business services are basically utilized by several clients and so they are likely to be situated on unique servers despite the fact that they may be located on similar node as data services. According to Cristea, (2010), partitioning functionality offers a comparatively stable design for scalability. Reference List HELMER, S., POULOVASSILIS, A., XHAFA, F. (2011).Reasoning in event-based distributed systems. Berlin, Springer. https://public.eblib.com/choice/publicfullrecord.aspx?p=3066610. SINGH, S. K. (2011).Database systems: concepts, design and applications management. Delhi, Dorling Kindersley (India). https://proquest.safaribooksonline.com/?fpi=9788131760925. QIAN, K. (2010).Software architecture and design illuminated. Sudbury, Mass, Jones and Bartlett Publishers. CRISTEA, V. (2010).Large-scale distributed computing and applications: models and trends. Hershey, PA, Information Science Reference. VOGEL, O., ARNOLD, I., CHUGHTAI, A., KEHRER, T. (2011).Software architecture a comprehensive framework and guide for practitioners. Berlin, Springer.