What is decentralized ledger technology and how does it relate to block chain?

• Blockchain is a specific type of decentralized ledger technology that uses blocks of data linked together in a chain.

• Decentralized ledger technology has no relation to blockchain

• Blockchain is a type of centralized ledger technology

• Decentralized ledger technology is a type of centralized database system

Explain what a DDoS attack is and how it can impact a network.

• A DDoS attack has no impact on a network

• A DDoS attack can improve network performance

• A DDoS attack only affects individual devices, not the entire network

• A DDoS attack can impact a network by causing it to become slow or unresponsive, leading to service disruption and potential financial losses.

What are some common types of malware and ransomware and how can they be prevented?

• Never updating software and operating systems

• Clicking on every email attachment and link

• Using antivirus software, keeping software updated, being cautious of email attachments and links, and regularly backing up data

• Using the same password for all accounts

Describe the concept of block chain and its key features.

• Blockchain is a decentralized and distributed physical ledger that records transactions across multiple computers. Its key features include mutability, transparency, security, and centralization.

• Blockchain is a centralized digital ledger that records transactions on a single computer. Its key features include mutability, opacity, insecurity, and centralization.

• Blockchain is a decentralized and distributed digital ledger that records transactions across multiple computers. Its key features include immutability, transparency, security, and decentralization.

• Blockchain is a centralized and distributed digital ledger that records transactions across multiple computers. Its key features include immutability, opacity, security, and decentralization.

What are some common cyber security threats and how can individuals protect themselves from them?

• Never updating software or systems

• Using strong, unique passwords, enabling two-factor authentication, keeping software and systems updated, being cautious of phishing attempts, and using a reliable antivirus program.

• Clicking on any link received in an email

• Sharing passwords with friends and family

How does decentralized ledger technology contribute to the security of block chain?

• It allows easy access to sensitive data

• It increases the risk of single points of failure

• It ensures data integrity and prevents single points of failure.

• It has no impact on the security of block chain

What are some strategies for preventing DDoS attacks?

• Implementing strong network security measures, using DDoS protection services, deploying firewalls and intrusion prevention systems, and regularly monitoring network traffic for unusual patterns

• Asking the attacker to stop the DDoS attack

• Ignoring network security altogether

• Installing more malware to counter the DDoS attack

How can organizations protect themselves from malware and ransomware attacks?

• Never updating software and leaving it vulnerable

• Using weak passwords and sharing them with colleagues

• Ignoring security measures and relying on luck

• Regularly updating software, using strong passwords, implementing security measures, and educating employees

Explain the process of mining in the context of block chain technology.

• Sending emails to request approval for adding new transactions to the blockchain

• Asking permission from the government to add new transactions to the blockchain

• Solving complex mathematical puzzles to validate and add new transactions to the blockchain.

• Using a pickaxe to extract digital coins from the internet

What are some best practices for maintaining cyber security in a digital environment?

• Never updating software and leaving it vulnerable to attacks

• Using simple and easily guessable passwords

• Not educating employees about cyber threats

• Implementing strong passwords, regularly updating software, using firewalls and antivirus software, educating employees about cyber threats, and regularly backing up data.