Abstract Network Coordinate System is vulnerable while facing malicious attacks. Traditional works can mitigate the negative influence caused by malicious attacks but the computing processes take too much computation resources. Thus the security awareness mechanism of NCS is taken into consideration. Through which nodes can aware whether it is suffering attack or not, and decide how to deal with the situations... Network Coordinate System is vulnerable while facing malicious attacks. Traditional works can mitigate the negative influence caused by malicious attacks but the computing processes take too much computation resources. Thus the security awareness mechanism of NCS is taken into consideration. Through which nodes can aware whether it is suffering attack or not, and decide how to deal with the situations they faced on. To identify the current security situation, this paper explores an unsupervised learning method which utilizes the spectral radius of the estimation error matrix of the time series. Our method is evaluated on the Vivaldi algorithm against many attack models. In our simulations malicious nodes perform all known attack methods against NCS. Experiments show that this method can recognize the situation of the networks swiftly with low computation cost. Read More Read Less

Abstract Shared network sites (SNSs) are gradually increasing and more attracting the consideration of academic analysts and industry researchers (analysts) industry scientists (investigators) charmed by their affordances and reach. This Network Consist of each client profile joins in regards to open shared framework and a variety of services as career and life development activities. Communication (Social) Media is platform that allow... Shared network sites (SNSs) are gradually increasing and more attracting the consideration of academic analysts and industry researchers (analysts) industry scientists (investigators) charmed by their affordances and reach. This Network Consist of each client profile joins in regards to open shared framework and a variety of services as career and life development activities. Communication (Social) Media is platform that allow people or various industries or company that share the information. This Media can take support with help of Internet (WEB) or Phone based technology. These Media design a format that exposes a message. Coming to Networking communicates in two sides. The Transmission Technology of media operates in a transmission system like many sources to many receivers. This is in contrast to established media that operates under a single source transmission model (one source to many receivers).Shared (Social) network is a website or other application that enables users to communicate with each other by posting information, comments, messages, images, etc. Read More Read Less

Abstract Queueing theory is the study of prediction and evaluation of the system performance. It has been studied and used since long time. It mainly studies the waiting line or queues. A queueing system can be described as customers arriving for service, waiting for service if it is not immediate, and if having waited for service, leaving the system after... Queueing theory is the study of prediction and evaluation of the system performance. It has been studied and used since long time. It mainly studies the waiting line or queues. A queueing system can be described as customers arriving for service, waiting for service if it is not immediate, and if having waited for service, leaving the system after being served. Queueing theory was developed to provide models to predict the behavior of systems that attempt to provide service for such randomly arising demands. Different queueing models are proposed to measure the system performance. These models differentiate with each other according to the Kendall’s notation A/B/X/Y/Z which is indicating the arrival, service, servers, system capacity and the queue discipline, respectively. The purpose of our study is to design a discrete event simulation for a commonly used Queueing Model M/D/1. The model represents exponential arrival of customers with a deterministic service rate on a single server system e.g. a production company with a single server machine or an output buffer of an ATM multiplexer where packets arrive exponentially and serviced as deterministically. The case study of the output buffer of an ATM multiplexer is included to compare the simulation results with analytical findings of the Model. We have designed the simulation using C/C++ programming language. Read More Read Less