hey...
This PPT is about Computer Virus and its prevention Technique
1. What is computer virus
2. Types of computer virus
3. How to prevent computer from Virus
4. Antivirus
5. Types of antivirus
This ppt is useful for
B.Ed course / MCA/BCA/ BBA/BCOM/MCOM/M.Ed etc.
Malicious Software,Terminology of malicious programme,Malicious programs,Nature of Viruses,Virus Operation-four phases or life cycle of virus,Virus Structure,Types of Viruses,Anti-Virus Software
hey...
This PPT is about Computer Virus and its prevention Technique
1. What is computer virus
2. Types of computer virus
3. How to prevent computer from Virus
4. Antivirus
5. Types of antivirus
This ppt is useful for
B.Ed course / MCA/BCA/ BBA/BCOM/MCOM/M.Ed etc.
Malicious Software,Terminology of malicious programme,Malicious programs,Nature of Viruses,Virus Operation-four phases or life cycle of virus,Virus Structure,Types of Viruses,Anti-Virus Software
This Presentation explains about Firewalls, Viruses and Antiviruses. I hope this presentation may help you in understanding about Viruses, Firewall and Antiviruses Software.
Hello friends. I am back with the new presentation related to the important treat in 21th century computer world. The Virus and the saviours that is antivirus.
This presentation will give you the information about what are the virus and its types and how can you use antivirus to protect the system from it.
OBJECTIVES
Introduction
What Is Virus?
Why Virus Are Called “Virus”?
How Do Virus Spread?
Virus Operation
How Virus work?
Common Virus Entry Points
Symptoms Of Virus Attack
Types of Computer Virus
Techniques used by Viruses
Anti-Virus Software
Methods used by Antivirus Software
Actions to Prevent Virus Infection
Conclusion
1. What is a computer security risk?
2. Virus
3. Trojan Horse
4. Worms
5. Stand-Alone Utility Programs
6. How can a virus spread through an e-mail message?
7. How does an antivirus program inoculate a program file
?
8. What is a firewall?
.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
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The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
1. A program or piece of code that is loaded onto your computer without
your knowledge and runs against your wishes.
A computer virus is a computer program that can copy itself and infect a
computer. The term "virus" is also commonly but erroneously used to
refer to other types of malware, adware, and spyware programs that do
not have the reproductive ability. A true virus can only spread from one
computer to another (in some form of executable code) when its host is
taken to the target computer.
The major difference between a computer virus and spyware is that
spyware does not replicate itself. A computer virus will gain entry onto
your computer using only one file and replicate its code many times onto
other files in your computer. Spyware is generally contained to one file
and can easily be deleted to rid your system of the problem.
2. Computer viruses can not infect write protected disks or infect written
documents.
Viruses do not infect compressed files, unless the file was infected prior
to the compression. [Compressed files are programs or files with its
common characters, etc. removed to take up less space on a disk.]
Viruses do not infect computer hardware, such as monitors or computer
chips; they only infect software.
In addition, Macintosh viruses do not infect DOS / Window computer
software and vice versa. For example, the Melissa virus incident of late
1998 and the ILOVEYOU virus of 2000 worked only on Window based
machines and could not operate on Macintosh computers
WHAT VIRUSES CAN DO
An annoying message appearing on the computer screen.
Reduced memory or disk space.
Modification of data.
Files overwritten or damaged.
Hard drive erased.
3. Viruses begin to work and spread when you start up the program or
application of which the virus is present. For example, a word processing
program that contains a virus will place the virus in memory every time
the word processing program is run.
Once in memory, one of a number of things can happen. The virus may be
programmed to attach to other applications, disks or folders. It may infect
a network if given the opportunity.
Viruses behave in different ways. Some viruses stay active only when the
application it is part of is running. Turn the computer off and the virus is
inactive. Other viruses will operate every time you turn on your computer
after infecting a system file or network.
4. 1. Macro Viruses:
Macro Viruses are one of the most commonly seen computer viruses. These are
platform independent viruses and hence they are seen in applications. They will be
making the application malfunctioning and thus we won’t be getting the desired
results out of it. These viruses are ported directly into the desired applications for
which it has been written. But don’t think that they won’t be doing any harm to other
parts of your system. They will surely be harming the whole performance of your
computer.
Examples: DMV, Nuclear, Word Concept.
2. Boot viruses:
These viruses infect floppy disk boot records or master boot records in hard disks.
They replace the boot record program (which is responsible for loading the operating
system in memory) copying it elsewhere on the disk or overwriting it. Boot viruses
load into memory if the computer tries to read the disk while it is booting.
Examples: Form, Disk Killer, Michelangelo, and Stone virus
3. Polymorphic viruses:
A virus that can encrypt its code in different ways so that it appears differently in
each infection. These viruses are more difficult to detect.
Examples: Involuntary, Stimulate, Cascade, Phoenix, Evil, Proud, Virus 101
5. 4. Trojan Horse:
Strictly speaking, a Trojan horse is NOT a virus because it does not replicate like
ordinary viruses do. A Trojan horse is an unfriendly program which will appear to be
something other than what it is, for example a program that is disguised as a
legitimate software program. The Trojan virus once on your computer, doesn't
reproduce, but instead makes your computer susceptible to malicious intruders by
allowing them to access and read your files. Making this type of virus extremely
dangerous to your computer's security and your personal privacy. Therefore, you
should avoid downloading programs or files from sites if you're not 100 percent
positive of what the file or program does. Below are some common Trojans:
Back Orifice 2000 : BO2K allows outsiders to access and modify any information on
a Windows 95, 98 and NT machines through an invisible server program installed by
the program. It also allows outsiders to spy on what user is doing. BO2K is expected
to be released on 10/7/1999.
5. Program viruses:
These infect executable program files, such as those with extensions like .BIN, .COM,
.EXE, .OVL, .DRV (driver) and .SYS (device driver). These programs are loaded in
memory during execution, taking the virus with them. The virus becomes active in
memory, making copies of itself and infecting files on disk.
Examples: Sunday, Cascade
6. 6. Stealth viruses:
These viruses use certain techniques to avoid detection. They may either redirect the
disk head to read another sector instead of the one in which they reside or they may
alter the reading of the infected file’s size shown in the directory listing. A stealth
virus actively hides the changes it has made to the hard disk so that it appears that it
has not infected the system.
For example, a file infector might stay memory resident and misreport the size of
infected files so they don't appear to be infected. Boot sector viruses can trap attempts
to read the boot sector and return forged data that makes them appear to be "clean".
For instance, the Whale virus adds 9216 bytes to an infected file; then the virus
subtracts the same number of bytes (9216) from the size given in the directory.
Examples: Frodo, Joshi, Whale
7. WORM:
A Worm is a virus program that copies and multiplies itself by using computer networks and
security flaws. Worms are more complex than Trojan viruses, and usually attack multi-user
systems such as Unix environments and can spread over corporate networks via the
circulation of emails. Once multiplied, the copied worms scan the network for further
loopholes and flaws in the network. A classic example of a worm is the ILOVEYOU virus.
The best way you can protect yourself from worms is by updating your security patches.
Operating systems and application vendors normally provide these patches. In addition, you
should avoid opening email attachments from unknown senders.
7. Antivirus (or anti-virus) software is used to prevent, detect, and remove
malware, including computer viruses, worms, and Trojan horses.. Such
programs may also prevent and remove adware, spyware and other forms
of malware(malicious software)
A software utility that searches a hard disk for viruses and removes any
that are found. Most antivirus programs include an auto-update feature
that enables the program to download profiles of new viruses so that it can
check for the new viruses as soon as they are discovered.
These programs scan the code of every file on your computer for traces of
viruses and spyware, and if found, the file is quarantined until the code
can be removed or the file deleted.
8. Protection
Antivirus software can provide real-time protection, meaning it can prevent unwanted
processes from accessing your computer while you surf the Internet.
Cleanup
Antivirus software allows you to scan your computer for viruses and other unwanted
programs, and provides you with the tools to get rid of them.
Alerts
Antivirus programs can alert you when something is trying to access your computer,
or when something in your computer is trying to access something on the Internet.
Updates
Antivirus programs can update themselves, keeping your computer's protection up to
date without you having to manually update it.
Further Protection
If an antivirus software finds an infected file that cannot be deleted, it can quarantine
the file so that it cannot infect other files or programs on your computer.
10. Conventional disk scanners:
This is the standard virus check program. It is run when the user requests it, and it scans the
contents of the disks, directories or files that the user wants, for any boot sectors and/or files
that contain viruses that it recognizes, based on the virus description information in its virus
definition files. Usually run manually by the user either as a preventive maintenance activity
or when a virus is suspected, scanning can also be automated through the use of a program
scheduler. This is the most common type of virus scanning program
Memory resident scanners:
Some antivirus software now comes with a special program that sits in the background while
you use your PC and automatically scans for viruses based on different triggers. These
programs typically can be configured to automatically scan programs as they are run or scan
floppy disks when you issue a shutdown command to the operating system.
Start up scanners:
Antivirus products often come with a special program that is designed to be run every time
the PC is booted up. It does a quick scan of the disk's boot sectors and critical system files
(instead of a full disk scan which takes a long time). The idea is to catch critical viruses,
especially boot sector viruses, before the PC boots up (which can give the virus a chance to
spread).
Inoculation:
This is a totally different approach to virus detection. Instead of looking for the
viruses themselves, this technique looks for the changes that the viruses make to files
and boot sectors. Starting with a clean system, the software "inoculates" each boot
sector and program file by storing a snapshot of information about it based on its
content and size. Then, periodically, it re-examines these files to see if anything has
changed. If it has, then the utility will inform you; if you haven't made the change, a
virus may have.
11. However, no matter how useful antivirus software is, it can sometimes
have drawbacks.
Antivirus software can degrade computer performance if it is not
designed efficiently.
Inexperienced users may have trouble understanding the prompts and
decisions that antivirus software presents them with. An incorrect
decision may lead to a security breach.
One study found that the detection success of major antivirus software
dropped over a one-year period.