Cyber Security Interview Questions And Answers | Cyber Security Interview Preparation | Intellipaat

Summary

This video by Intellipaat covers essential cybersecurity interview questions and answers, simulating a real interview scenario. Topics include defining cybersecurity, the differences between hacking and cybersecurity, types of hackers, firewalls, and encryption. The video also discusses key concepts like the CIA triad, TCP handshake, DNS, VPN, ARP, and the OSI model layers. It introduces security measures like salting, VPNs, and honeypots, and compares SSL with HTTPS. The session concludes with multiple-choice questions to test knowledge, aiming to help viewers prepare for cybersecurity interviews.

Takeaways

• 🔐 Cyber security is essential for protecting data and networks from unauthorized access, such as hacking and data destruction.
• 🛡️ Hacking is offensive, while cyber security is defensive. Firewalls help protect networks by filtering traffic based on rules.
• 💻 The three types of hackers are black hat (malicious), white hat (ethical), and gray hat (situational).
• 🌐 DNS (Domain Name System) translates human-readable domain names like google.com into IP addresses.
• 🔑 The CIA triad in cyber security stands for Confidentiality, Integrity, and Availability, which are crucial for securing information.
• 🔑 Symmetric encryption uses one key for both encryption and decryption, while asymmetric encryption uses a pair of public and private keys.
• 🔍 Vulnerability assessment identifies potential flaws in systems, whereas penetration testing actively exploits them to find vulnerabilities.
• 🌐 A three-way handshake is a process in TCP communication used to establish a reliable connection between a host and a client.
• 🕵️‍♂️ VPN (Virtual Private Network) creates a secure, encrypted connection, ensuring privacy and data protection during online communication.
• 💻 RDP (Remote Desktop Protocol) allows users to connect to another computer over a network for remote management and access.

Q & A

What is cyber security?

Cyber security is the practice of protecting your data or network from unauthorized access to prevent hackers from stealing or destroying information. Examples include cryptography and two-factor authentication.

What is the difference between hacking and cyber security?

Hacking is an offensive term where a hacker gains unauthorized access to a system to steal or destroy data. Cyber security, on the other hand, is a defensive term that involves protecting systems from hacking.

What is a firewall, and how does it work?

A firewall is a network security device that monitors incoming and outgoing network traffic based on predetermined security rules. It either allows or blocks packets, acting as a barrier between a trusted internal network and the open internet.

What are the different types of hackers?

There are three types of hackers: Black hat hackers (malicious), White hat hackers (ethical, hired to find vulnerabilities), and Grey hat hackers (who may switch between both roles depending on circumstances).

What is DNS (Domain Name System)?

DNS is like the internet's phonebook. It translates human-readable domain names (like google.com) into machine-readable IP addresses (like 168.192.0.1).

What is the CIA triad in information security?

The CIA triad is a model designed to guide security policies within organizations. It stands for Confidentiality (restricting access to data), Integrity (ensuring data is trustworthy), and Availability (ensuring authorized access to data when needed).

What is the difference between symmetric and asymmetric encryption?

Symmetric encryption uses a single key for both encryption and decryption, while asymmetric encryption uses a pair of public and private keys. Symmetric encryption is faster and used for large data transfers, while asymmetric is slower and used for secure key exchanges.

What is the difference between hashing and encryption?

Both hashing and encryption convert readable data into an unreadable format, but while encrypted data can be reversed back to its original form through decryption, hashed data cannot be reversed to its original form.

What is a three-way handshake process in TCP?

A three-way handshake is a process used in TCP for establishing a reliable connection between a client and a server. It involves three steps: the client sends a SYN packet, the server responds with a SYN-ACK, and the client replies with an ACK to confirm the connection.

What is VPN (Virtual Private Network), and how does it work?

A VPN establishes a secure connection between a user and the internet, encrypting data to protect it from interference, snooping, or censorship. It helps ensure privacy and security when using the internet.