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CS432 Network Modeling and Simulation Assignment No 02 Fall 2020 Solution / Discussion

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CS432 Network Modeling and Simulation Assignment No 02 Fall 2020 Solution

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Assignment No. 02

Semester: FALL 2020

CS432: Network Modeling and Simulation



The objective of this assignment is to enhance the learning capabilities of the students about:

  • Mean time between failure (MTBF) & mean time to repair (MTTR)
  • Role of OMNET++ simulation
  • Network security vulnerabilities


Please read the following instructions carefully before submitting assignment:

You need to use MS word document to prepare and submit the assignment on VU-LMS.

It should be clear that your assignment will not get any credit if:



Question No. 1:                

Suppose a system has mean time between failure (MTBF) 5000 hours and mean time to recover (MTTR) 10 hours then calculate the system’s availability.

Note: Mention all necessary calculations and formula(if any)


Solution :


Availability = MTBF / (MTBF+MTTR)

                                     = 5000/ 5010 》 0.998

                   Availability = 99.8%


 Question No. 2

  • Simulation analysis is the extraction and representation of meaningful data from the scalar and vector files. Which type of methodology can be adopted to draw useful conclusions of simulation analysis?



The statistical methods useful to draw better conclusion of simulation analysis.


  • What is the role of analysis file (.anf) during the OMNET++ simulation? How you will analyze its data?


The role of Analysis File (.anf) is to  automates the steps to analyze the results.

By following these steps : We able to analyze the data  in first Loading result files  than Filter them respectively Transform data at last Chartify the results.


Question No. 3:                                                                                                                                    

  • By considering network security, comprehensive planning is half success, when you are planning network security of your wireless network which type of protection you will like to adopt to avoid the War driving? According to your understanding, which type of recce attack it will be?



For the protection of wireless network from war driving attack  change your router administration account name and password and also activate the Media Access Control (MAC) Address filtering feature of your router .

According to the given scenario, it’s a  Passive reconnaissance attack.


  • Intruders use sniffers to steal sensitive information. As a network administrator, how you can use sniffer for the security of the network?


As a network administrator monitors network traffic flow. Anti-sniff scans are useful when guarding against sniffer attacks, as are switched networks.


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