Computer Studies - Junior Secondary 3 - Internet and computer virus

Internet and computer virus

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Term: 1st Term

Week: 7

Class: Junior Secondary School 3

Age: 14 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Computer studies

Topic:-       Internet and Computer Virus

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Define computer virus
  2. List and explain the types of computer virus

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher revises the previous lesson on digital divide

Students pay attention

STEP 2

EXPLANATION

She defines computer virus

Students pay attention and participates

STEP 3

DEMONSTRATION

She lists and explains the types of virus

 

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

INTERNET AND COMPUTER VIRUS

Computer viruses are software programs that are designed to delete, change, steal or block files or settings on computer.

Viruses tend to interfere with the smooth running of computer systems

Some types of viruses are simply annoying, while other types can be intrusive, hostile, or even destructive. Viruses are mostly spread through internet but are also widely spread through USB sticks and mobile devices.

What are viruses designed to do?

Through the course of using the internet and your computer, you may have come in contact with computer viruses. A computer virus might corrupt or delete data on your computer, use your email program to spread itself to other computers, or even everything on your hard disk.

 

TYPES OF COMPUTER VIRUSES

There are several different categories of viruses and malware. Here is a breakdown of the types of computer viruses around today.

  1. Trojan Horse: Is a deceptive form of virus that disguises its true intention until downloaded unto a computer drive.
  2. Worms is a program that makes and facilitates the distribution of copies of itself; for example, from one disk drive to another, or by copying itself using email or another transport mechanism to cause damage on a computer.
  3. Boot sector Virus: This virus type that attaches itself to the first part of the hard disk that is read by the computer upon boot – up. These are normally spread by floppy disks.
  4. Macro Virus: Macro viruses are viruses that use another application’s macro programming language to distribute themselves. They infect document such as MS Word or MS Excel and are typically spread to other similar document.
  5. Memory Resident Viruses: Memory Resident Viruses reside in a computers’ volatile memory (RAM).
  6. Rootkit Virus: Is an undetectable virus which attempts to allow someone to gain control of a computer system.
  7. Polymorphic Viruses: Is a virus that replicates itself by creating multiple files of itself, but it also changes its digital signature every time it replicates.
  8. Logic Bombs/Time Bombs: These are viruses which are programmed to initiate at a specific date or when a specific event occurs. Some examples are virus which deletes your photos.

EVALUATION:    1. Define computer virus

  1. Mention and explain five types of computer virus

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively