May 2018

Cloud object storage stores unstructured data(like application images or media files) in the cloud.  Object storage is elastic, flexible and easily scalable into multiple petabytes which ideal for environment where data growth is unlimited hence it is considered a good fit for the cloud. Contrary to Block Storage which deal data as block and logical volumes, file storage which is a hierarchical files structure storage; Object Storage Architecture stores and manages data as objects.  Block and file storage prove expensive …

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OpenFlow is a standard protocol of SDN which assist SDN Controller to communicate directly with the forwarding plane of network devices such as switches and routers, both physical and virtual (hypervisor-based), so it can better adapt to changing business requirements. Generally the conventional switches forwards the packets which are called the Forwarding Plane and do high-level routing that happens on the Control Plane which occur on same device but in OpenFlow switch it separates the forward plane from the control …

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SDN or Software-defined networking is a new technology which will soon replace the traditional Data Center networking architecture specially after introduction of Virtulization and Cloud. This term comprises of several kinds of network technologies which aimed at making the network as agile and flexible for virtualized server and storage infrastructure of the modern Data Center. The opennetwork.org defined SDN as “The physical separation of the network control plane from the forwarding plane, and where a control plane controls several devices.” …

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Tcpdump is a network sniffer tool. It is most powerful and widely used command line tool for Linux/Unix. It sniff or capture the TCP/IP traffic that receive or transfer over a network. tcpdump has an option to save captured packets in a file for future analysis. It can be save in a pcap format file, that can be viewed by tcpdump command or a open source GUI based tool called Wireshark (GUI Network Packet analyser tool) that reads tcpdump pcap format files. 1. Prequisite for …

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