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FIREWALL

                 The term 'firewall' originally referred to a physical barrier designed to contain a fire or prevent
                 its spread within a building. In a computer, a firewall is a software or hardware-based network

                 security  system  that  controls  incoming  and  outgoing  network  traffic  according  to  a  set  of
                 predefined rules. It acts as a gatekeeper and prevents unauthorised access to a computer network.
                 A firewall examines each data packet that arrives on the network and decides whether to allow or
                 block it based on these rules. Essentially, a firewall creates a barrier between a trusted and secure
                 internal network and an external network (such as the Internet) that is considered untrusted and

                 potentially insecure.

                    Reb            t


                         A computer virus is a ‘piece of code’ or program developed to corrupt data or program
                       files stored on a computer system.
                        Malware is a broad term for various types of malicious software designed to damage,
                       disrupt, or gain unauthorised access to a computer system.
                        The different types of malware  are  the worms, trojan  horses, spywares,  ransomware,
                       rootkits, and backdoors.

                        Antivirus software is a program designed to identify, prevent, and remove malware from
                       your computer.
                        A firewall is a software or hardware-based network security system that controls incoming
                       and outgoing network traffic according to a set of predefined rules.





                   OneOne Touch          Learn                                              Section A (Objective)



                 A.  Tick ( ) the correct option.
                    1.  Which of the following is not a type of a computer virus?
                       a. Macro Virus                                       c. Boot Sector Virus

                       b. E-mail Virus                                      d. Trojan Horse

                    2.  Which virus is also known as a file-infecting virus?

                       a. file-infecting                                    c. Both a and b

                       b. file injector                                     d. None of these

                    3.  Norton is a/an ................................ .

                       a. system software                                   c. operating system

                       b. antivirus software                                d. device driver




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