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With the fast development of cloud computing and online business of Internet, the importance of data center is gradually increasing. Conventional Ethernet protocols can hardly meet the scalability and performance requirements of data centers (DCs). The traditional method solves the congestion problem by reducing the network throughput. In this paper, based on software-defined networks (SDNs) technology,...
Due to the centralized control, network-wide monitoring and flow-level scheduling of Software-Defined-Networking (SDN), it can be utilized to achieve Quality of Service (QoS) for cloud applications and services, such as voice over IP, video conference and online games, etc. However, most existing approaches stay at the QoS framework design and test level, while few works focus on studying the basic...
Many different types of applications simultaneously execute in current data centers (DCs). To provide low cost and improved performance, each application is typically deployed in distributed DCs. Tasks of users around the world first go through Internet service providers (ISPs) which deliver data between distributed DCs and users. However, capacities and bandwidth cost of different ISPs vary. Besides,...
More and more businesses are deploying their application(s) with different cloud providers which are close totheir customers in order to provide better Quality of Service(QoS) to their end customers. In this work, an optimized andsecure software-defined overlay network is proposed as an efficientmechanism to interconnect these geographically-dispersedapplications compared to using only plain IP routing...
In the last years, several projects are emerged with the aim to addressing the challenge of providing solutions for deployment, monitoring, adaptation, and management of clouds belonging to different enterprises/organisations. In such scenarios the network connectivity is one of the key factors. SDN technologies represent a good solution to face this challenge. Separating the control plane from the...
Cloud computing is proven service delivery model over the internet. Network play's an important role during this service provisioning but Cloud network have major security issue during service delivery. Network security and reliability achieve together is much more difficult task. Now a day cloud traditional network is replaced by the programmable and unified software defined network which have separate...
A novel internetworking paradigm, software-defined exchange (SDX), allows multiple independent administrative domains to share computing, storage, and networking resources. Although the term SDX is very recent, the concept has already been used by many distinct disciplines. For example, cloud-computing researchers use it to add network virtualization resources to their inter-clouds, while networking...
Network Function Virtualization (NFV) provides the technology pathway to meet next-generation application needs for mobile cloud adoption. Underpinning this is the virtualization of core infrastructure, such as compute, storage, and networking. Virtualizing key mobile networking functions, such as access networks (4G, LTE, CDMA, non-3GPP Wi-Fi), transport networks (radio access network [RAN], eNodeB,...
In cloud data centers, a resource controller is currently used to deploy virtual machines (VMs) and create virtual networks. To decide which servers VMs are deployed on and migrated to, conventional resource controllers take into account the amount of server resources and usage but not physical network loads. Network resources are more difficult to adjust than server resources since manipulations...
Nowadays the use of enterprise VPN services is integrated in every larger company. SOHO and SMB also use VPN for connection with internet providers, VoIP, banking transactions. Our approach suggests to automatize building and using multicomponent VPN topologies. We also proposed the cloud to build full-mesh dynamic multipoint VPNs based on routers using scripts.
Quality of Service (QoS) -- based bandwidth allocation plays a key role in real-time computing systems and applications such as voice IP, teleconferencing, and gaming. Likewise, customer services often need to be distinguished according to their service priorities and requirements. In this paper, we consider bandwidth allocation in the networks of a cloud carrier in which cloud users' requests are...
There are two key issues that prevent Application Service Providers (ASPs) from fully leveraging the cloud "advantage." First, in modern enterprise and Internet-based application environments, a separate middlebox infrastructure for providing application delivery services such as security (e.g., firewalls, intrusion detection), performance (e.g., SSL off loaders), and scaling (e.g., load...
With network infrastructure reaching capacity limits, new ways of managing network traffic and devices in Cloud data centres need to be investigated to better scale and manage the data centre resources. Open Flow can be a good fit for the usage within a datacentre due to its promise to reduce the cost of operations by reducing the time needed to configure network resources and flexibly managing the...
Co-operative peer-to-peer systems have lot of relevance due to their desirable properties like lack of centralized control and transparency. But in certain applications, the stability of peer-to-peer systems is affected when concentrated load spikes occur. In this work, we explore the case for cloud-assisted peer-to-peer systems to handle spikes using peer-to-peer search as a case study. We identify...
Traditional Infrastructure-as-a-Service offerings provide customers with large numbers of fixed-size virtual machine (VM) instances with resource allocations that are designed to meet application demands. With application demands varying over time, cloud providers gain efficiencies through resource consolidation and over-commitment. For cloud customers, however, this leads to inefficient use of the...
Malware and computer forensic researchers often communicate with malicious servers, either directly or indirectly, through the web browser or other ports utilized by malicious software. Communication with this form of adversary can sometimes necessitate the use of a proxy server in order to conceal the true origin of the researcher's traffic. Open source projects such as OpenVPN currently offer a...
In cloud-computing environments, migration of virtual machines (VMs) between data centers can solve many problems such as load balancing and power saving. One of the difficulties in wide-area migration, however, is the “address-warping” problem, in which the address of the VM warps from the source server to the destination server. This confuses or complicates the status of the WAN, and the LANs connected...
In order to fully realize the potential of Cloud and High Performance Computing (HPC) applications, significant improvement is required in the cost/performance of data center networks. While recent industry standards such as Quantized Congestion Notification (QCN) for Converged Enhanced Ethernet (CEE) have begun to address this issue, there are still significant problems left open. Therefore we propose...
A new cloud computing architecture introducing customization of network functions based on active network is studied. To flexibly reconfigure the network functions depending on the requirement of each cloud computing environment, network functions are deployed on a virtual machine. Customizable sequences of network functions are essential for cloud computing environments. The content-based packet...
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