1.3 Summarize cloud concepts and connectivity options.

Question 1

What is Network Functions Virtualization (NFV)?

Answer 1

• Replaces physical network devices with virtual versions of them in the cloud.
• You can manage them from the hypervisor.
• Click and deploy from the hypervisor

Question 2

What is the Virtual Private Cloud (VPC)?

Answer 2

• A pool of resources created in a public cloud.
• Common to have different ones for different application instances.
• Uses transit gateway to connect all the instances together.

Question 3

What are network security groups?

Answer 3

This allows you grant access to users for certain resources that co-exist on a virtual network where there are resources that they DO NOT need to access.
- These allow admins to provide additional granularity with regards to specific rules to groups.

Question 4

What are network security lists?

Answer 4

A firewall that is created for your cloud-based services that can control inbound and outbound traffic flows.
- Layer 4 (TCP/UDP port numbers)
- Layer 3 (Individual addresses, CIDR block notation, IPv4 or IPv6)
- They can be vrey broad and do NOT provide a lot of granularity.

Question 5

What is an Internet/Transit Gateway (Cloud)?

Answer 5

Connects users on the internet from anywhere in the world and allows them to have access to your applications.

Question 6

What is a Network Address Translation (NAT) gateway (CLOUD)?

Answer 6

• The are private cloud subnets connected to external resources.
• External resources cannot access the private cloud.

Question 7

What is a Virtual Private Network (VPN) (CLOUD)?

Answer 7

Site-to-site VPN through the internet by accessing the transit gateway.

Question 8

What does it mean to have a direct connection in the CLOUD?

Answer 8

A direct connection between cloud provider networks using a VPC Endpoint.

Question 9

Explain public deployment for the CLOUD.

Answer 9

It would be available to everyone over the internet.

Question 10

Explain private deployment for the CLOUD.

Answer 10

Your own virtualized local data center.

Question 11

Explain hybird deployment for the CLOUD.

Answer 11

It is a mix of public and private cloud.

Question 12

Explain SaaS in the CLOUD.

Answer 12

• Software as a Service
• No local installation
• Someone else has written the application and manages the application.
• A complete application offering.

Question 13

Explain PaaS in the CLOUD.

Answer 13

• Platform as a Service.
• No servers, no software, no maintenance team.
• Someone else handles the platform, you handle the development.
• You do not have direct control of the data, people, or infrastructure.
• You put the building blocks together based on what is available to you on the platform.

Question 14

Explain IaaS in the CLOUD.

Answer 14

• Infrastructure as a Service
• Can also be referred to as Hardware as a Service (HaaS).
• You are outsourcing your equipment and using your own software on-top of it.
• You would manage all of it on the hardware and would be responsible for the data on the hardware.

Question 15

Explain Scalability in the CLOUD.

Answer 15

The ability of a cloud infrastructure to change in size or their use of resources to meet the changing workload demands.

Question 16

Explain elasticity in the CLOUD.

Answer 16

The ability to scale up or down as needed.

Question 17

Explain multitenancy in the CLOUD.

Answer 17

Many different customers are using the same cloud infrastructure.

Question 18

What is an example(s) of SaaS?

Answer 18

Google Mail or Microsoft Office 365

Question 19

What is an example of IaaS?

Answer 19

A web server provider.

Question 20

What is an example of PaaS?

Answer 20

SalesForce.com