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• Function Expansion of Network Topology inMininet

  Dao Nhu Ngoc, Pham Quang Dung

  Date Received: 22-07-2015 / Date Accepted: 03-09-2015 / Date Published: 13-06-2025

   Abstract PDF (VIETNAMESE)

  The Software Defined Networking technology promises a bright future to IP network. Many researcheshave beenbeing conducted. However, until now there are only a few frameworks supportingemulation and implementation to verify the research. Mininet is one of the most popular tools because of the openness, cost effectiveness, and full Openflow support. By default, Mininet helps to create a standalone typical SDN network along with lightweight clients. In this paper, we explorethe extended functions of network topology emulation in Mininet based on Virtualbox, such as Internet connection, independent OS clients, standard routing controller, and automatic flow logging. Therefore, it brings about an easier and convenient facility to research and training.

  DOI: https://doi.org/10.31817/tckhnnvn.2015.13.6.

• Research on Security of Software-definednetworking(SDN) and Application

  Nguyen Thi Thao, Tran Vu Ha, Luong Minh Quan

  Date Received: 02-08-2021 / Date Accepted: 15-08-2022

   Abstract PDF (VIETNAMESE)

  In this article, we focus on software-defined networking(SDN) technology. SDN is a flexible, manageable, high-performance, and adaptable architecture. SDN has shownits potentials for application that require high bandwidth and flexibility. However, it also poses challenges in terms of datasecurity. To better understand SDN, we study the characteristics, advantages and disadvantages of SDN, compareit with traditional network. Next, we discuss the security threats in a SDN-based network. We also present some techniques that can be used to prevent and mitigate the risks to the network. Along with theory about SDN, we implement a demo SDN system using Mininet and Onos. This virtual system is simple but it showsall the advantage and disadvantage of a typical software-defined network.