Wired Network Performance Consider a wired network model (OMNET++) using a Gigabit Ethernet (GbE) backbone switch linked to several Ethernet sub-switches (also called subnet) so that large number of wired nodes/clients can be accommodated to the network. For example, one subnet can support up to 20 nodes (for optimum performance). So, if you are simulating a network with 100 nodes in total, your network model should have 5 subnets linked to a GbE backbone. Simulation parameters: • Number of nodes/clients: 100 • Simulation time: 3600 Sec (longer required for Video streaming) • Traffic type: Video streaming • Packet type: UDP packet • Performance metrics: (a) Video Throughput; (b) Video End-to-end delays; (c) Video packet losses. [Hint: Video streaming uses UDP transport layer protocol, and hence UDPVideoStreamCli, UDPVideoStreamSvr can be used for video client and video Server, respectively.] Investigation: Effect of increasing the number of video clients on system performance You may use the following table to record your simulation results. Analyse the results (including model validation) and write your report (4-6 pages) by summarising your research findings. Hint: You can draw several graphs including number of clients versus video throughput, end-to-end delays, and packet losses.

Title: Performance Analysis of a Gigabit Ethernet (GbE) Wired Network Model for Video Streaming

Introduction:
In recent years, with the exponential growth of video content on the internet, the demand for efficient video streaming networks has significantly increased. As a result, there is a particular interest in studying the performance of wired networks for video streaming applications. This research aims to investigate the effect of increasing the number of video clients on system performance using a wired network model with a Gigabit Ethernet (GbE) backbone switch.

Network Model and Simulation Parameters:
The network model considered in this study consists of a GbE backbone switch connected to multiple Ethernet sub-switches, also known as subnets. Each subnet can accommodate up to 20 wired nodes/clients, ensuring optimum performance. For simulating a network with 100 nodes, five subnets are linked to the GbE backbone switch.

The simulation parameters for this study are as follows:
– Number of nodes/clients: 100
– Simulation time: 3600 seconds (longer duration required for video streaming)
– Traffic type: Video streaming
– Packet type: UDP packet
– Performance metrics:
a) Video throughput
b) Video end-to-end delays
c) Video packet losses

To simulate video streaming, UDP transport layer protocol is used, and the UDPVideoStreamCli and UDPVideoStreamSvr modules are employed for video clients and video server, respectively.

Simulation Results and Analysis:
To analyze the performance of the network model, the following simulation results need to be recorded and analyzed:

1. Video throughput: The video throughput represents the amount of video data successfully transmitted from the server to the clients within a given time frame. By varying the number of video clients and measuring the corresponding video throughput, the relationship between the two can be examined. The results can be visualized using a graph, plotting the number of clients against the video throughput.

2. Video end-to-end delays: End-to-end delays refer to the time taken for a video packet to travel from the server to a client. This metric is crucial in ensuring real-time video delivery without noticeable delays. Similar to the video throughput, the end-to-end delays can be plotted against the number of clients to assess how the network performance is impacted.

3. Video packet losses: Packet losses occur when video packets fail to reach their destination. These losses can lead to degradation in video quality and interruptions in the streaming experience. By varying the number of clients and measuring the corresponding packet losses, it is possible to evaluate the impact on system performance.

Model validation involves comparing the simulation results with theoretical expectations and existing research findings. If the simulated results align with the established knowledge, it lends credibility to the model and the research findings.

Conclusion:
Based on the analysis of the simulation results, it is expected that an increase in the number of video clients in the wired network model would have an impact on video throughput, end-to-end delays, and packet losses. By understanding this relationship, network administrators can optimize their systems to support a higher number of clients without compromising performance.