Describe the five IP addressing classes. Provide an example for each of classes in binary and dotted-decimal representation. Show the conversion of each of the addresses. Describe the function of the subnet address for each of the classes and how does it work.
 
Define message switching, circuit switching and packet switching. Draw a diagram for each method to show the difference between them. Identify the samples of network environment that use each of this switching method. What are the advantages and disadvantages?
 
Write a simple program to create three processes using fork() commands. Use any three of the six system calls to show how each child process executes new sub-programs using exec’s minions. Show the output of each of the child process with different data samples.
 
Compare the bus topology and the star topology. Draw a complete diagram for any given environment for each of the LAN topology. Provide your own assumptions and scenario for each topology to illustrate the concept. Provide the details requirements including the hardware and infrastructure to set-up the proposed solution.
 
Write a simple program in your Linux environment using C++ to identify PID, PPID and GID for the processes created in Question 3 and display the real and effective user  

b. Modify the program you wrote for Question 3 and include the alarm system call to kill one of the processes that you had created in 30 second.