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ANTIVIRUS

                  A set of programs that  identify and  remove malware  are  known  as antivirus software.  You

                  must have an antivirus software installed on your computer. It detects the virus in the computer
                  and does not let the virus copy itself on your computer system.

                  Hundreds of new viruses are developed every hour. Antivirus software
                  developers regularly release updates on the Internet that allow their
                  programs to detect the latest known viruses. You can update your copy
                  of antivirus only through the Internet. So, it is essential to have an Internet
                  connection to update antivirus software.

                  Some well-known  antivirus programs  are  Norton,  Quick Heal,  AVG, McAfee,  Symantec,
                  Kaspersky, etc.














                           Norton                  Quick Heal                  AVG                    McAfee

                      FIREWALL

                  The term ‘firewall’ originally referred to a wall intended to confine a fire or potential fire within
                  a  building.  In  computer,  a  firewall  is a  software or  hardware-based  network  security  system
                  that controls the incoming and outgoing network traffic according to a set of predefined rules.
                  A firewall acts like 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.

                     Recap


                           A computer virus is a ‘piece of code’ or 'program' developed to corrupt the data or
                          program files stored on the computer system.

                           A malware is a type of malicious program designed to damage or carryout other
                          unwanted actions on a computer system.
                            The different types of malware are worm, trojan horse, spyware, ramsomware and
                           rootkit.
                            A set of programs that identify and remove malware are known as antivirus software.
                            A computer gets infected through various ways like e-mail attachments, infected
                           removable media, malicious ads etc.


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