E. Answer the following:
1. What is a virus? Write its types.
2. What is the function of an Antivirus software?
3. What is a firewall?
4. Define Spam
5. Compare hackers and crackers.
6. Define Recovery utilities.
7. What are the various security provisions in E-commerce?
8. What do you understand by the term Worm?
Describe the term Trojan Horse.
0. List the problems that can be caused by a virus in a computer.
1. What do you understand by Data backup? Explain any two techniques of
Answers
Step-by-step explanation:
1) A computer virus, much like a flu virus, is designed to spread from host to host and has the ability to replicate itself. Similarly, in the same way that flu viruses cannot reproduce without a host cell, computer viruses cannot reproduce and spread without programming such as a file or document.
Types are :
1. boot sector virus
2. web scripting virus
2) Antivirus software is a program or set of programs that are designed to prevent, search for, detect, and remove software viruses, and other malicious software like worms, trojans, adware, and more.
3) A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.
4) Spam is any kind of unwanted, unsolicited digital communication, often an email, that gets sent out in bulk.
5) hacker:
1. The good people who hack for knowledge purposes.
2. They are skilled and have a advance knowledge of computers OS and programming languages.
Cracker :
1. The evil person who breaks into a system for benefits.
2. They may or may not be skilled, some of crackers just knows a few tricks to steal data.1.
Answer:
1) Last Updated: 29-05-2018. A virus is a fragment of code embedded in a legitimate program. Virus are self-replicating and are designed to infect other programs. They can wreak havoc in a system by modifying or destroying files causing system crashes and program malfunctions.
2) Antivirus software is a program or set of programs that are designed to prevent, search for, detect, and remove software viruses, and other malicious software like worms, trojans, adware, and more.
3)in computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet.
4) irrelevant or unsolicited messages sent over the internet, typically to a large number of users, for the purposes of advertising, phishing, spreading malware, etc.
5) A hacker is a person intensely interested in the arcane and recondite workings of any computer operating system. Hackers are most often programmers. ... A cracker is one who breaks into or otherwise violates the system integrity of remote machines with malicious intent.
6) Most data loss is caused by human error, rather than malicious attacks, according to U.K. statistics released in 2016. In fact, human error accounted for almost two-thirds of the incidents reported to the U.K. Information Commissioner's Office. The most common type of breach occurred when someone sent data to the wrong person.
Other common causes of data loss include power outages, natural disasters, equipment failures or malfunctions, accidental deletion of data, unintentionally formatting a hard drive, damaged hard drive read/write heads, software crashes, logical errors, firmware corruption, continued use of a computer after signs of failure, physical damage to hard drives, laptop theft, and spilling coffee or water on a computer.
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8) Blaster Worm., the worm has been designed to tunnel into your system and allow malicious users to control your computer remotely. A Trojan horse is not a virus. It is a destructive program that looks as a genuine application. Unlike viruses, Trojan horses do not replicate themselves but they can be just as destructive.
9) Here is a list of 20 computer virus symptoms or indicators that your computer may have a virus.
Your Computer Slows Down. ...
Crashing. ...
Pop-ups. ...
Hard Drive Malfunction. ...
Running Out of Storage Space. ...
Unwanted Programs or Messages That Start Automatically. ...
Disabled Security Solution. ...
Sending Strange Messages Automatically.
10) Data Backup – What is it? Backup is the process of creating a copy of the data on your system that you use for recovery in case your original data is lost or corrupted. You can also use backup to recover copies of older files if you have deleted them from your system.
