Describe the three-schema architecture. why do we need mapping between schema levels?
Cybersecurity is crucial in today's digital world due to several reasons: 1. Protection of Data: With vast amounts of personal, financial, and organizational data stored online, cybersecurity ensures that sensitive information remains confidential and secure from unauthorized access, theft, or manipRead more
Cybersecurity is crucial in today’s digital world due to several reasons:
1. Protection of Data: With vast amounts of personal, financial, and organizational data stored online, cybersecurity ensures that sensitive information remains confidential and secure from unauthorized access, theft, or manipulation.
2. Prevention of Cyber Attacks: As cyber threats evolve and become more sophisticated, cybersecurity measures help in detecting, preventing, and mitigating various types of cyber attacks such as malware, phishing, ransomware, and denial-of-service (DoS) attacks. attacks can disrupt operations, steal data, and cause financial losses.
3. Protection of Infrastructure: Critical infrastructure sectors such as energy, transportation, and healthcare depend on interconnected systems and networks. Cybersecurity helps in securing these infrastructures from cyber threats that could potentially impact public safety and national security.
4. Privacy and Trust: Maintaining cybersecurity fosters trust among users and customers. It assures individuals that their personal information is handled responsibly and securely, enhancing confidence in digital transactions and online services.
5. Legal Requirements: Many industries are subject to regulatory requirements and standards related to data protection and cybersecurity. Adhering to these regulations not only helps in avoiding legal repercussions but also demonstrates commitment to protecting stakeholders’ information.
In essence, cybersecurity is vital for safeguarding digital assets, ensuring business resilience, maintaining trust, and upholding privacy in an increasingly interconnected and digitalized world.
The three-schema architecture separates database definition into three levels: External Schema (Views): Customized views for different users. Conceptual Schema: Overall logical structure, independent of storage. Internal Schema: Physical storage details (invisible to users). Mappings connect these lRead more
The three-schema architecture separates database definition into three levels:
Mappings connect these levels:
This layered approach offers benefits:
- Data Independence: Changes to storage won’t affect user views.
- Security: Users only see authorized data.
- Flexibility: New user views can be added easily.
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