Virtual machine technology has been successfully applied for the construction of fault-tolerant computing systems. For example, vmware Fault Tolerance and Xen Remus support transparent failover of VMs running on different physical machines in a local area network. However, high availability alone is in many application domains not sufficient. Especially in the context of Cyber-Physical Systems,...

As virtualization continues to become increasingly popular in enterprise and organizational networks, operators and administrators are turning to live migration of virtual machines for the purpose of workload balancing and management. However, the security of live virtual machine migration has yet to be analyzed. This paper looks at this poorly explored area and attempts to empirically demonstr...

Cloud computing platforms are considerably attractive for parallel applications that perform large-scale, computationally intensive tasks. These platforms can provide elastic computing resources to the parallel software owing to system virtualization technology. Almost every cloud service provider operates on a pay-per-use basis, and therefore, it is important to estimate the performance of par...

The prevalence of computer and the internet has brought forth the increasing spate of cybercrime activities; hence the need for evidence to attribute a crime to a suspect. The research therefore, centres on evidence, the legal standards applied to digital evidence presented in court and the main sources of evidence in the Windows OS, such as the Registry, slack space and the Windows event log. ...

This study provides performance comparisons of various storage connection options available to VMware® ESX Server. We used the widely used IOmeter benchmark for the comparison. The results show that all four network storage options can reach wire‐speed throughput when properly configured. The wire‐speed throughput is also maintained with multiple virtual machines driving concurrent I/Os, indica...

When Internet Protocol (IP) packets travel across networks, they must meet size requirements defined in the network’s Maximum Transmission Unit (MTU). If the packet is larger than the defined MTU, then it must be divided into smaller pieces, which are known as fragments. Attackers can exploit this process for their own purposes by attacking the systems. Packet fragmentation attacks have caused ...

Storage replication is one of the essential requirements for network environments. While many forms of network attached storage (NAS), storage area networks (SAN), and other forms of network storage exist, there is a need for a reliable synchronous storage replication technique between distant sites (greater than 1 mile). Such technology allows setting new standards for network failover and fai...

Virtualization is a framework of dividing the resources of a computer into multiple execution environments which offers a lot of benefits including flexibility, security, ease to configuration and reduction of cost but at the same time it also brings a certain degree of performance overhead. Furthermore, Virtual Machine Monitor (VMM) is the core component of virtual machine (VM) system and its ...

In this paper we have presented the main characteristics of the most important reference architectures designed for the cloud computing environment. Specifically, we have introduced the proposed architectures of the worldwide cloud computing companies like Cisco, IBM and VMware and we also had a look at the National Institute of Standards and Technology (NIST) reference architecture which is th...

There can be a lot of QoS parameters that can improved in IP MPLS network Backbone such as bandwidth, CPU utilization, memory requirement, resources distribution and database optimization of each router in the backbone. In this paper, we have optimized database of each router by involving DR/BDR election on each interface so that all involved routers use that elected DR router as to communicate...