Question 1

What is computer security?

Accepted Answer

Computer security involves protecting computer systems and data from theft, damage, or misuse. It encompasses a wide range of practices and technologies.

Question 2

What are the three main goals of computer security (CIA triad)?

Accepted Answer

The CIA triad refers to Confidentiality, Integrity, and Availability. These are the three core principles.

Question 3

What is the difference between authentication and authorization?

Accepted Answer

Authentication verifies a user's identity, while authorization determines what a user is allowed to access. Authentication confirms who a user is.

Question 4

What is a firewall, and how does it work?

Accepted Answer

A firewall is a network security device that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

Question 5

Explain the concept of defense in depth.

Accepted Answer

Defense in depth is a security strategy that employs multiple layers of security controls to protect an asset. It is important to implement several layers.

Question 6

What is the principle of least privilege?

Accepted Answer

Granting only necessary access rights.

Question 7

What is the difference between a vulnerability and a threat?

Accepted Answer

A vulnerability is a weakness in a system that could be exploited by a threat. A threat is a potential danger that can exploit a vulnerability.

Question 8

What is a zero-day vulnerability?

Accepted Answer

A zero-day vulnerability is a security flaw that is unknown to the vendor or the public. It is a vulnerability that has not been patched.

Question 9

What is social engineering?

Accepted Answer

Social engineering is the art of manipulating people into divulging confidential information or performing actions that compromise security. It involves human interaction.

Question 10

What is phishing?

Accepted Answer

Phishing is a type of social engineering attack where attackers impersonate a trustworthy entity to steal sensitive information. It usually involves emails.

Question 11

What is a network protocol?

Accepted Answer

A network protocol is a set of rules and standards that govern how data is transmitted between devices over a network. It is a set of rules.

Question 12

What is TCP/IP?

Accepted Answer

TCP/IP (Transmission Control Protocol/Internet Protocol) is the fundamental communication language or protocol of the Internet. It is the foundation.

Question 13

What is the OSI model?

Accepted Answer

The OSI (Open Systems Interconnection) model is a conceptual framework that describes how data is transmitted over a network. It is a model.

Question 14

What is a VPN (Virtual Private Network)?

Accepted Answer

A VPN is a secure, encrypted connection over a public network, such as the internet. It provides a secure tunnel.

Question 15

What is a DNS (Domain Name System)?

Accepted Answer

DNS is a system that translates human-readable domain names (like example.com) into IP addresses. It's the internet's phonebook.

Question 16

What is a man-in-the-middle (MITM) attack?

Accepted Answer

A man-in-the-middle (MITM) attack is a type of attack where an attacker intercepts communication between two parties. It is an interception.

Question 17

What is a denial-of-service (DoS) attack?

Accepted Answer

A denial-of-service (DoS) attack is an attempt to make a machine or network resource unavailable to its intended users. It is an interruption.

Question 18

What is a distributed denial-of-service (DDoS) attack?

Accepted Answer

A distributed denial-of-service (DDoS) attack is a DoS attack that uses multiple compromised systems as sources of attack traffic. It is a widespread attack.

Question 19

What is port scanning?

Accepted Answer

Port scanning is a technique used to identify open ports on a network device. It is an investigation.

Question 20

What is network segmentation?

Accepted Answer

Network segmentation is the practice of dividing a computer network into smaller, isolated subnets. It is a division.

Question 21

What is a buffer overflow?

Accepted Answer

A buffer overflow is a type of security vulnerability that occurs when a program writes data beyond the allocated memory buffer. It is an overflow.

Question 22

What is SQL injection?

Accepted Answer

SQL injection is a type of attack where an attacker inserts malicious SQL code into an input field to manipulate a database. It is an injection.

Question 23

What is cross-site scripting (XSS)?

Accepted Answer

Cross-site scripting (XSS) is a type of attack where attackers inject malicious scripts into websites viewed by other users. It is a scripting attack.

Question 24

What is a software vulnerability scanner?

Accepted Answer

A software vulnerability scanner is a tool that identifies security vulnerabilities in software applications. It is an identification tool.

Question 25

What is input validation?

Accepted Answer

Input validation is the process of verifying that user-supplied data meets expected criteria. It is a verification process.

Question 26

What is output encoding?

Accepted Answer

Output encoding is the process of converting data to a safe format before it is displayed to the user. It is a conversion.

Question 27

What is a security patch?

Accepted Answer

A security patch is a piece of software designed to fix a security vulnerability. It is a software update.

Question 28

What is a security audit?

Accepted Answer

A security audit is a systematic assessment of an organization's security posture. It is an assessment.

Question 29

What is penetration testing?

Accepted Answer

Penetration testing, also known as ethical hacking, involves simulating attacks to identify vulnerabilities in a system. It is a simulation.

Question 30

What is a code review?

Accepted Answer

A code review is a systematic examination of source code to identify vulnerabilities, bugs, and coding style issues. It is an examination.

Question 31

What is the purpose of a security information and event management (SIEM) system?

Accepted Answer

A SIEM system is designed to collect and analyze security-related data from various sources to detect and respond to security incidents. It is a data management tool.

Question 32

What is the role of a security analyst?

Accepted Answer

A security analyst monitors, analyzes, and responds to security incidents. They are the front line.

Question 33

What is the importance of incident response?

Accepted Answer

Incident response is a set of procedures and processes used to identify, contain, and recover from security incidents. It is a process.

Question 34

What is malware?

Accepted Answer

Malware, short for malicious software, is any software designed to disrupt, damage, or gain unauthorized access to a computer system. It is malicious.

Question 35

What is ransomware?

Accepted Answer

Ransomware is a type of malware that encrypts a victim's files and demands a ransom payment to restore access. It is a demand.

Question 36

What is a virus?

Accepted Answer

A computer virus is a type of malware that attaches itself to other files and spreads to other systems. It is an attachment.

Question 37

What is a worm?

Accepted Answer

A computer worm is a type of malware that self-replicates and spreads across a network without user interaction. It is a self-replicator.

Question 38

What is a Trojan horse?

Accepted Answer

A Trojan horse is a type of malware disguised as a legitimate program. It is a disguise.

Question 39

What is multi-factor authentication (MFA)?

Accepted Answer

Multi-factor authentication (MFA) requires users to provide multiple forms of verification to access a system. It is multiple factors.

Question 40

What is a security token?

Accepted Answer

A security token is a physical or digital device used to provide an additional layer of authentication. It is an authenticator.

Question 41

What are the different types of encryption algorithms?

Accepted Answer

Encryption algorithms are mathematical functions used to encrypt and decrypt data. They are mathematical tools.

Question 42

What is symmetric encryption?

Accepted Answer

Symmetric encryption uses the same key to encrypt and decrypt data. It is a shared key.

Question 43

What is asymmetric encryption?

Accepted Answer

Asymmetric encryption uses a pair of keys: a public key for encryption and a private key for decryption. It is a key pair.

Question 44

What is a digital signature?

Accepted Answer

A digital signature is an electronic signature used to verify the authenticity and integrity of a digital document. It is a verification tool.

Question 45

What is a certificate authority (CA)?

Accepted Answer

A certificate authority (CA) is a trusted entity that issues digital certificates. It is a trusted issuer.

Question 46

What is the purpose of a security policy?

Accepted Answer

A security policy is a document that outlines an organization's security rules, guidelines, and procedures. It is a guide.

Question 47

What is a risk assessment?

Accepted Answer

A risk assessment is a process of identifying, analyzing, and evaluating potential threats and vulnerabilities to an organization's assets. It is an evaluation.

Question 48

What is business continuity planning (BCP)?

Accepted Answer

Business continuity planning (BCP) is the process of creating a plan to ensure that an organization can continue its critical business functions during and after a disaster. It is a plan.

Question 49

What is disaster recovery (DR)?

Accepted Answer

Disaster recovery (DR) is the process of restoring IT systems and data after a disaster. It is a restoration.

Question 50

What is the role of cryptography in computer security?

Accepted Answer

Cryptography is the practice and study of techniques for secure communication in the presence of third parties. It is a study.

Question 51

What is the difference between a hash and encryption?

Accepted Answer

Hashing creates a unique fingerprint, while encryption transforms data for confidentiality.

Question 52

What is the difference between a worm and a virus?

Accepted Answer

Worms self-replicate and spread, while viruses require a host file.

Question 53

What is the purpose of a security token?

Accepted Answer

To provide an additional factor for authentication.

Question 54

What is the CIA triad?

Accepted Answer

Confidentiality, Integrity, and Availability.

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