Question

Please answer the following questions:
1) Describe the main functions of a computer network (12 marks)

2) In your own words, compare the three types of files: directories, ordinary files, and special files. Explain what would happen if a user modified a directory file (10 marks)

3)What are the advantages of having a Windows system using the menu-driven interface, instead of typing commands. Give at least one example where having menus is an advantage (6 marks)

4) Identify at least five major types of threats to systems running Windows and the policies that system administrators must take to protect the system from unauthorized access. Compare the practical problems when balancing the need for accessibility with the need to restrict access and suggest the first action you would take to secure a Windows computer or network if you managed one, and why that would be your first choice (12 marks)

5) Google owns Android as well as the Chrome operating system. Compare the similarities and differences between the two systems (10 marks)

6) Describe in your own words how you would manage access control for a network with multiple system administrators (10 marks)

7) Give at least two advantages of installing a network operating system (NOS) instead of a distributed operating system (DO/S) for a small business. If it’s necessary to make assumptions about the small business for your answer, be sure to state them (6 marks)

8) Imagine that you are managing a university system that becomes CPU-bound at the conclusion of each school semester. If you were allowed to double the number of processors, what effect on throughput would you expect? If you could make one additional change to the system, what would it be? Explain why you’d expect your changes to improve performance

9) Without using jargon, explain the key advantages of a UNIX operating system as if you were explaining it to a high school student who is unfamiliar with a computer science terminology

Answer 1

Answer.)

1) Computer Networks plays an important role in each and every aspects of our day to day activities, be it a small mobile based game or a company with various world wide users.
It provides support to each and every computing environment, within that network to stay connected in terms of working functionality and feasibility. The various main functions are :

• Data Sharing Mechanism :

With the data sharing mechanism in computer networks, the ease to share or transfer data within the same network is more convenient and reduces time complexity. Now, within the same network various people can share and access various files as per requirement very easily.

• Resource Sharing Mechanism :

With Data Sharing mechanism, Computer network also provides resource sharing mechanism, in which various I/o devices, internet connections, servers, etc can be share within the same network. Hence, enhancing flexibility of various resource accesses.

• Network based inter communication :

In networking, it supports various computing devices within a same network to communicate with one another, hence, enabling network based inter communications.

• Data Security :

Computer networks provide huge security over data into networks, by the process of data distribution. In this process, various copies of data are distributed over the networks into various computing devices. Hence, preventing data loss by achieving data security.

• Reducing Complexity and saving power:

Various complex problems are broken down into multiple smaller operations and shared over the network with each small operation to be executed in various computing devices over the network, hence reducing complexity and saving power for highly recommended complex problems.

These are the various important functions of Computer networks.