ISSN: 2996-671X
Authors:
The prevalence of Covid-19 has made it impossible to put various kinds of scientific experiments into practice, especially in Japanese senior high schools, because scientific experiments necessarily require many students to gather in the inside of one laboratory and to keep academic discussion with each other. This is the reason why on-line lectures, which can be substituted for on-site lectures, have been developed. Actually, the network skills enabling lectures and meetings to be delivered among the conference venues on the Internet such as Zoom, Microsoft Teams and Google Meet cannot help senior high school teachers to conduct on-line scientific experiments. More concretely speaking, they point out that there exist some problems accompanying on-line lectures, some of which can be summarized as the following: • Problem 1: Though Zoom can deliver the one-way lectures where the contents are streamed from teachers to students only, it cannot deliver the round-trip lectures where the contents are streamed not only from teachers to students but from students to teachers. • Problem 2: It is difficult to deliver some contents from teachers to students and other contents from students to teachers in parallel. In this paper, we introduce a method of constructing virtual ICT laboratories which enables teachers and students to participate in a common ICT experiment where they can deploy such network application tools as web browsers and web servers and they can observe individual ICT settings mutually. This method can be realized by the simultaneous combined use of Zoom, SoftEther VPN and Cisco Packet Tracer. Throughout this paper, this method is assumed to be applied to several groups of teachers and students belonging to senior high schools which are geographically separated from each other. We can classify this system into the following: • Case 1: The case where several PCs on which virtual ICT laboratories are deployed by teachers and students exist in a common network segment. • Case 2: The case where several PCs on which virtual ICT laboratories are deployed by teachers and students exist in several network segments which are geographically separated from each other. It is one thing to realize Case 1 and quite another to realize Case 2, because the former case does not need the Internet, but the latter case needs it. In other words, while the network circumstances following Case 1 require wireless LAN routers, the network circumstances following Case 2 require some other network application tools such as SoftEther VPN and so on.
Keywords: Cisco Packet Tracer; Multiuser Listening System; Zoom; SoftEther VPN
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