NVLab, a Networking Virtual Web-Based Laboratory that Implements Virtualization and Virtual Network Computing Technologies
NVLab, a Networking Virtual Web-Based Laboratory that Implements Virtualization and Virtual Network Computing Technologies
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DOI：
10.1109/tlt.2009.31
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发表时间：
2010-04
影响因子：
3.7
通讯作者：
Muhammad Wannous;H. Nakano
中科院分区：
文献类型：
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作者：
Muhammad Wannous;H. Nakano
在各种信息和通信技术课程中，有必要建立一个适当的空间，每个学习者都可以访问一套网络设备，他/她可以使用这些设备构建和测试具有不同结构和组件的网络。这将使学习者能够像在真实的世界背景的情况下那样练习在多个设备上工作，并自由地对网络结构进行修改，以解决当前场景可能出现的任何问题。虽然校园设施的设计符合这一标准，但目前的基于Web的实验室要么有固定的网络设计，要么没有提供许多真实的设备来工作。为了建立基于Web的实验室，我们在NVLab中使用了开源虚拟化和虚拟网络计算技术，该系统为学习者提供了绘制，配置，测试，以及使用在主机上以虚拟模式运行的真实的操作系统实例来对网络设计进行故障排除。该系统的功能已通过引入一个案例研究练习一组远程学习者作为计算机网络课程的一部分进行了实验。评估参与者的进步是通过比较他们在完成练习之前和之后的答案来完成的。评估结果表明，学习者在完成练习后的水平测试中取得了较好的成绩，并能够有效地使用该系统。
In various ICT courses, it is necessary to establish a proper space where each learner has access to a set of network devices with which he/she can build and test networks with different structures and components. This will enable the learners to practice working on multiple devices as in the case of real world context, and freely apply modifications to the network structure to solve any issue that may arise with the current scenario. While on-campus facilities are designed to meet this criterion, current Web-based laboratories either have fixed network designs, or do not offer a number of real devices to work on. Taking a step forward toward building a Web-based laboratory, we used open source Virtualization and Virtual Network Computing technologies in NVLab, a system that offers the learners tools to draw, configure, test, and troubleshoot network designs using real Operating System instances running in the virtual mode on a host machine. The functionality of the system has been experimented by introducing a case study exercise to a group of remote learners as part of Computer Networks course. Evaluating the participants' advancement was done by comparing their answers to a level test prior and after completing the exercise. The evaluation showed that the learners achieved better results in the level test after completing the exercise and were able to use the system efficiently.