Page 37 - iPlus_Ver_2.0_class_7
P. 37

i +  ANTIVIRUS   i +  FIREWALL

 A set of programs that identifies and removes malware is known as antivirus software. You must   The term ‘firewall’ originally referred to a wall intended to confine a fire or potential fire within
 have antivirus software installed on your computer. It detects the virus in the computer and   a building. On a computer, a firewall is a software or hardware-based network security system
 prevents it from replicating itself on your computer system.  that controls the incoming and outgoing network traffic based on an applied rule set. It acts like

 Hundreds of new viruses are  developed every  hour.  Antivirus software  developers regularly   a gatekeeper and prevents unauthorised access to a computer network. It inspects every data
 release updates on the Internet that allow their programs to detect the latest known viruses. You   packet that arrives on a network and decides, on the basis of a set of predefined rules, whether
 can update your copy of antivirus only through the Internet. So, it is essential to have an Internet   to pass or not. A firewall establishes a barrier between a trusted, secure internal network and
 connection to update antivirus software. Eradicating a virus is the term used for cleaning a   another network (for example, the Internet) that is not assumed to be secure and trusted.
 computer.
 There are several methods of eradication. Some of them are:
                    To Sum Up
 •  Removing the code in the infected file that corresponds to a virus

 •  Removing the infected file    A computer virus is a type of unwanted computer program which is developed by
 •  Quarantining the infected file, which involves moving it to a location where it cannot be run   miscreants with an intention to infect the files of a computer, to corrupt a database or
                        to hamper the functioning of a computer system.
 •  Informing the user about the presence of the malware and the action that has been taken
                         Malware  is a  type  of  malicious program  designed  to  damage  or  carry  out  other
 •  Separating all the infected files and applications so that the infection cannot spread further
                        unwanted actions on a computer system.
 Some well-known  antivirus  programs  are  Norton,  AVG,  McAfee,  Symantec,  SmartDog,
                         The different types of malware are the worm, trojan horse, spyware,  ransomware,
 Kaspersky, Quick Heal, etc.
                        rootkit and backdoor.
                         A set of programs that identifies and removes malware is known as antivirus software.
                         A firewall is a software or hardware-based network security system that controls the
                        incoming and outgoing network traffic based on an applied rule set.




                                                           Exercise

 Info Byte
                                                       Section A (Objective)
 Scan your files through an antivirus program before opening or downloading from the
                 A.  Tick (3) the correct option.
 internet. If your antivirus software detects a virus, clean it; if the software is unable to
                     1.  Which of the following is not a type of computer virus?
 clean it, delete the file.
                        a. Macro virus                                  b. E-mail virus
 #Digital Literacy      c. Boot Sector virus                            d. Trojan horse

 Let’s CatCh Up      2.  What is another name for a program file virus?


 Identify the following pictures and write their names:      a. File-infecting virus      b. File injector virus

                        c. Both a and b                                 d. None of these
                     3.  What is Norton?

                        a. System software                              b. Antivirus

                        c. Operating system                             d. All of these




                                                                                                                  35
                                                                                                Computer Virus
   32   33   34   35   36   37   38   39   40   41   42