DifficultRound

Which cloud computing service model provides consumers with computing resources including servers, storage, and networking, while allowing them to control the operating systems, applications, and sometimes network components?

• Function as a Service (FaaS)

• Platform as a Service (PaaS)

• Infrastructure as a Service (IaaS)

• Software as a Service (SaaS)

Answer explanation

IaaS provides virtualized computing resources over the internet, giving users control over the operating system and applications (e.g., AWS EC2, Azure Virtual Machines).

A Content Delivery Network (CDN) is primarily used to:

• Host entire websites and web applications.

• Provide secure, encrypted tunnels for private network access.

• Improve the speed and reliability of content delivery by serving web content from geographically distributed servers.

• Manage virtual machines in a cloud environment.

Answer explanation

CDNs cache content at 'edge locations' closer to users, reducing latency and improving loading times.

What is the primary difference between symmetric and asymmetric encryption?

• Symmetric encryption uses the same secret key for both encryption and decryption, while asymmetric encryption uses a pair of public and private keys.

• Symmetric encryption uses different keys for encryption and decryption, while asymmetric uses the same key.

• Symmetric encryption is primarily used for digital signatures, while asymmetric encryption is used for data privacy.

• Asymmetric encryption is faster and more efficient for bulk data encryption.

Answer explanation

This is the fundamental distinction. Symmetric is faster but requires secure key exchange; asymmetric allows secure communication without prior key sharing.

What is the primary function of a digital certificate in cybersecurity?

• To verify the identity of a website or user and establish trust.

• To scan for and remove malware from a computer system.

• To create secure backups of critical data.

• To encrypt all data transmitted between two parties.

Answer explanation

Issued by Certificate Authorities (CAs), digital certificates bind a public key to an entity's identity, assuring users that they are communicating with the legitimate party.

Which system design principle advocates for minimizing dependencies between components, allowing them to be developed, tested, and maintained independently?

• Strong Encapsulation

• High Cohesion

• Loose Coupling

• Tight Integration

Answer explanation

Loose coupling refers to reducing the interdependencies between modules, making them more independent and easier to modify or replace.