What is meant by authentication? What are the types of authentications?
Authentication is the process of verifying a user’s identity before granting him or her access to a computer system. Password protection, biometric authentication, are some types of Authentications.
What is Trojan?
Trojan is a type of malware which conceals itself inside the software which seems legitimate.
What is the use of antivirus program?
An antivirus program is a software which can detect the presence of a virus on a computer and remove the virus
How will you keep your physically fit?
We will keep our computer physically fit by
* Cleaning the keyboard
* Cleaning the mouse
* Cleaning the monitor
What is malware? How does it affect your computer? Mention some types of malwares.
Malware is designed to damage or do unwanted actions on the computer system without authentication. The different types of malware are:
virus, worm, Trojan, spyware rootkit and backdoor
What is a virus?
A computer virus is a type of malware designed to corrupt data or files stored on the computer system, some computer viruses can spread if the computer is part of a network.
What is a Worm?
A computer worm is a type of malware that can replicate itself without human interaction, it consumes lots of memory space by replicating, this causes the infected computer to slow its processing speed and randomly stop tasks, it can spread to other computers by replicating.
What is spyware?
The function of spyware is to spy on a user’s activity and other things on his computer and send back the information it gathers to a hacker, spyware has no infection mechanisms, it is usually dropped by other malware types and then sits silently to avoid detection.
What is a zombie?
A zombie has no infection mechanism, it sits there silently doing nothing until the hacker gives it commands, sometimes, hackers can infect tens of thousands of computers and turn them to zombie machines.
What is ransomware?
Ransomware is a type of malware that kidnaps data from the host system by encrypting it, the hacker then forces the owner of the hacked computer to pay a large sum of money to get back access to their data.
What is a rootkit?
A rootkit is a type of malware that gains administrator access to the host system, once the hacker gains access to the system, the rootkit hides itself but keeps the access, it is hard to detect rootkits because they can use the administrator access to bypass tracking software.
What is a backdoor?
A backdoor is a type of malware which enters the computer bundled with other files or software, it is used to gain access to the host computer.
What is a firewall?
A firewall is a software that controls the network traffic that goes in and out based on an applied rule set, it acts like a gatekeeper and prevents unauthorized access to a computer network.
