Ccna certification Practice Tests

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Appendix 

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  Answers to Practice Test Questions

 62.  C.  When an internal IT department hosts the virtualization for a company, they are 

hosting a private cloud. A public cloud is virtualization infrastructure that is open to the 

public. An elastic cloud is a cloud that has elasticity. Rapid elasticity is one of the five 

characteristics that NIST defines as a characteristic of cloud computing. Internal cloud is 

not a term that describes virtualization; therefore, it is an invalid answer.

 63.  B.  A cloud services catalog satisfies the self-service aspect of cloud computing. It does 

this by listing all of the available virtual machines (VMs) that can be created in the cloud 

environment, such as web servers, application servers, databases, and so on. The cloud 

services catalog does not define the capabilities for the cloud, since the capabilities could 

be much more expansive than the cloud services catalog. The cloud services catalog does 

not define the available VMs currently running in the cloud. The cloud services catalog 

also does not define the drivers for VMs in the cloud; this would be the agent or services 

file required for VMs running in the cloud.

 64.  C.  A hosted medical records service is an example of the SaaS, or Software as a Service, 

model. The customer cannot choose variables such as vCPU or RAM. The cloud provider 

is responsible for the delivery of the software, maintenance of the OS, and maintenance 

of the hardware. An example of Platform as a Service (PaaS) would be Google App 

Engine or Microsoft Azure, where code could be executed on a virtual stack of equipment 

(programming platform). An example of Infrastructure as a Service (IaaS) is Amazon 

Web Services (AWS) Elastic Compute (EC2), where a VM can be started up with virtual 

network services with only a credit card and you are billed periodically. An example of 

Backup as a Service (BaaS) is Microsoft Azure cloud backup or Google Drive, just to name 

a couple.

 65.  A.  A hosted service that allows you to develop upon it is an example of the Platform as 

model. The cloud provider is responsible for the delivery of APIs that developers can use to 

create programs. An example of Infrastructure as a Service (IaaS) is Amazon Web Services 

(AWS), where a VM can be started up with virtual network services with only a credit 

card and you are billed periodically. An example of Software as a Service (SaaS) is your 

email provider or a customer relation management (CRM) company such as Salesforce. An 

example of Backup as a Service is Microsoft Azure cloud backup or Google Drive, just to 

name a couple.

 66.  C.  An intercloud exchange is a service that connects multiple public clouds through 

a common private WAN connection. This allows a network engineer to configure the 

private WAN once and be able to transition between the public clouds on the service side 

without reconfiguration of the private WAN. A Multiprotocol Label Switching (MPLS) 

VPN is a VPN connection that is built over an MPLS network (private connection). 

An Internet VPN is a VPN connection that is built over the public Internet (public 

connection). A private wide area network (WAN) is one or more network connections 

between your facilities using public WAN connectivity methods.

 67.  A, D.  Internal bandwidth usage is not a consideration after conversion to an SaaS 

application. External bandwidth should be considered since internal users will access the 

application through the Internet. Location of the users should also be a deciding factor in 

moving to an SaaS model.

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Chapter 1: Network Fundamentals (Domain 1)