Day 8 Quiz - Cloud Concepts & Wireless

Objective 1.8/Day 8 -

​ (a)   = services are provided over the internet to multiple organizations or users.

​ (b)   = services are provided with in a single organization's network.

​ (c)   = combines elements of both public and private cloud models.

​ (d)   = shared infrastructure and resources are used by a specific community of organizations or users.

• Public
• Private
• Hybrid
• Community

Answer explanation

Public = Services are provided over the internet to multiple organizations or users.

Private = Services are provided within a single organization's private network.

Hybrid = Combines elements of both public and private cloud models.

Community = Shared infrastructure and resources are used by a specific community of organizations or users.

Objective 1.8/Day 8 -

Match each cloud concept with its characteristics:

• Infrastructure as Code

• Offers virtualized computing resources over the internet, including virtual machines, storage, and networking.

• Desktop as a Service (DaaS)

• Provides a platform with development tools, middleware, and runtime environments for building, deploying, and managing applications.

• Software as a Service (SaaS)

• Provides software applications over the internet on a subscription basis.

• Platform as a Service (PaaS)

• Delivers virtual desktop environments over the internet to end-users, accessible from any device.

• Infrastructure as a Service (IaaS)

• Represents the practice of managing and provisioning infrastructure resources using code and automation tools.

Answer explanation

Software as a Service (SaaS) = Provides software applications over the internet on a subscription basis.

Infrastructure as a Service (IaaS) = Offers virtualized computing resources over the internet, including virtual machines, storage, and networking.

Platform as a Service (PaaS) = Provides a platform with development tools, middleware, and runtime environments for building, deploying, and managing applications.

Desktop as a Service (DaaS) = Delivers virtual desktop environments over the internet to end-users, accessible from any device.

Infrastructure as Code = Represents the practice of managing and provisioning infrastructure resources using code and automation tools.

Objective 1.8/Day 8 -

Which cloud concept refers to the ability of a cloud environment to dynamically allocate and deallocate resources based on workload demands?

• Multitenancy

• Elasticity

• Scalability

• Security implications

Answer explanation

Elasticity in cloud computing describes the ability of a cloud environment to automatically adjust the amount of resources—such as compute power, storage, or network capacity—based on current workload demands. This means resources can be scaled up or down dynamically, ensuring that the system can handle varying loads efficiently without manual intervention.

Objective 1.8/Day 8 -

What cloud characteristic describes the capability of a cloud system to handle an increasing workload by adding resources without causing a disruption in service?

• Multitenancy

• Elasticity

• Scalability

• Security implications

Answer explanation

Scalability refers to the ability of a cloud system to expand and manage increased workloads by adding more resources, such as compute instances or storage, seamlessly and without affecting the availability or performance of the service. This ensures that the system can grow to meet demands while maintaining consistent service levels.

Objective 1.8/Day 8 -

In cloud computing, the term "multitenancy" refers to:

• The ability to quickly adapt to changing workloads.

• The practice of providing services to multiple users or tenants from a shared infrastructure.

• Ensuring data confidentiality and integrity in a cloud environment.

• The automatic scaling of resources based on demand.

Answer explanation

Multitenancy allows multiple customers (tenants) to share the same physical resources while keeping their data and configurations isolated from one another. This approach is often used to maximize resource utilization and reduce costs.

Objective 1.8/Day 8 -

When considering cloud security, what aspect should IT professionals primarily focus on to ensure the protection of sensitive data in a shared environment?

• Multitenancy

• Elasticity

• Scalability

• Security implications

Answer explanation

Security implications involve understanding and addressing the risks and challenges associated with securing data and systems in a cloud environment. This includes implementing robust security measures such as encryption, access controls, and monitoring to protect sensitive data and ensure that it remains secure even in a shared infrastructure.

Objective 2.4/Day 8 -

Match the following 802.11 standards with their characteristics:

• 802.11a

• Maximum data rate up to 600 Mbps in the 2.4 GHz and 5 GHz frequency bands

• 802.11n

• Operates in the 2.4 GHz frequency band with a maximum data rate of 11 Mbps.

• 802.11b

• Maximum data rate up to 54 Mbps in the 5 GHz frequency band.

Answer explanation

802.11a = Maximum data rate up to 54 Mbps in the 5 GHz frequency band.

802.11b = Operates in the 2.4 GHz frequency band with a maximum data rate of 11 Mbps.

802.11n = Maximum data rate up to 600 Mbps in the 2.4 GHz and 5 GHz frequency bands.

Objective 2.4/Day 8 -

Match the following 802.11 standards with their characteristics:

• 802.11ax

• Maximum data rate up to 54 Mbps in the 2.4 GHz frequency band.

• 802.11ac

• Maximum data rate up to 1.3 Gbps in the 5 GHz frequency band.

• 802.11g

• Maximum data rate of up to 9.6 Gbps in the 2.4 GHz and 5 GHz frequency bands.

Answer explanation

802.11g = Maximum data rate up to 54 Mbps in the 2.4 GHz frequency band.

802.11ac = Maximum data rate up to 1.3 Gbps in the 5 GHz frequency band.

802.11ax = Maximum data rate of up to 9.6 Gbps in the 2.4 GHz and 5 GHz frequency bands.

Objective 2.4/Day 8 -

​ (a)   = Deprecated and insecure security protocol, susceptible to various attacks.

​ (b)   = Improved security over WEP, introduced in response to vulnerabilities. Utilizes TKIP for encryption.

​ (c)   = Provides encryption and authentication for personal networks using a pre-shared key (PSK).

​ (d)   = Utilizes a combination of AES and TKIP encryption methods for enhanced security.

• WEP
• WPA
• WPA2-Personal
• WPA/WPA2-Enterprise
• WEP
• WPA3
• WPA-PSK

Answer explanation

WEP =Deprecated and insecure wireless security protocol, susceptible to various attacks.

WPA = Improved security over WEP, introduced in response to vulnerabilities. Utilizes TKIP for encryption.

WPA2-Personal = Provides encryption and authentication for personal networks using a pre-shared key (PSK).

WPA/WPA2-Enterprise = Utilizes a combination of AES and TKIP encryption methods for enhanced security.

Objective 5.4/Day 8 -

What does RSSI measure in wireless networking?

• Speed

• Distance

• Signal strength

• Throughput

Answer explanation

RSSI is a value that indicates the power level of the received signal from a wireless device, such as a router or access point. Higher RSSI values generally represent stronger signal strength, which can impact the quality and reliability of the wireless connection.