Peer Review

Selective Repeat / Go Back N

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Overall Rating:

Content Quality:

Effectiveness:

Ease of Use:

Overview:: Simulator on Selective Repeat / Go Back N
Type of Material:: Simulation
Recommended Uses:: The animations can complement a lecture on ARQ protocols (e.g., to show the animations after presenting some lecture slides). It can also be used in a tutorial or lab exercise (e.g., to let students explore the protocol by changing the settings).
Technical Requirements:: A typical browser can run the simulation.
Identify Major Learning Goals:: It explains the selective repeat and Go-back N ARQ protocol through animations. Users change can the settings and do some simple experiments.
Target Student Population:: Undergraduate students Suitable for a basic networking course
Prerequisite Knowledge or Skills:: Basic knowledge of networking or data communications Some basic computing knowledge

Rating:
Strengths:: The animation is clear and concise. Information sufficiency is good. Students can change the setting easily. It provides a good way to demonstrate the concept by allowing students to try different parameters. In other words, it demonstrates the core concept. Its overall quality is good - it can be applied in different situations.
Concerns:: It is better if more explanations or instructions can be provided.

Rating:
Strengths:: It is generally effective because students can see the protocol operation clearly. Teachers can change the settings easily (e.g., using some special settings) to demonstrate different cases. The animation can in particular reinforce the concept because most lecture slides on ARQ protocols are static. It can be integrated with an assignment (e.g., to ask students to use different parameters to see the effect).
Concerns:: It does not have assessment tasks to measure students' learning outcome. Students need to have a basic understanding about the parameters when using this simulation. It is better if some exercises can be provided.

Rating:
Strengths:: It is easy to use. User engagement is good because users can change the parameters (i.e., it is interactive). The animation is visually appealing. The interface quality is good.
Concerns:: It does not have an instruction. It does not have any background or link about the concepts to be learnt.

Other Issues and Comments:: It is an interactive simulation tool for explaining Selective Repeat / Go Back N. It is effective and easy to use. However, students need to have a basic understanding of the two concepts before using this tool.
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