An enterprise plans to start using a public cloud service, and is considering different WAN options. The answers list four options under consideration. Which options provide good security by keeping the data private while also providing good QoS services? (Choose two answers.)
Please select 2 correct answers
Private WAN options use technologies like Ethernet WAN and MPLS, both of which keep data private by their nature and which include QoS services. An intercloud exchange is a purpose-built WAN service that connects to enterprises as well as most public cloud providers, using the same kinds of private WAN technology with those same benefits. For the two incorrect answers, both use the Internet, so both cannot provide QoS services. The Internet VPN option does encrypt the data to keep it private.
Which of the following cloud services is most likely to be used for software development?
PaaS (Platform as a Service) supplies one or more virtual machines (VM) that have a working operating system (OS) as well as a predefined set of software development tools. As for the wrong answers, Software as a Service (SaaS) supplies a predefined software application, but typically with no ability to then later install your own applications. IaaS (Infrastructure as a Service) supplies one or more working VMs, optionally with an OS installed, so it could be used for software development, but the developer would have to install a variety of development tools, making IaaS less useful than a PaaS service. Finally, SLBaaS (Server Load Balancing as a Service) can be offered as a cloud service, but it is not a general service in which customers get access to VMs on which they can then install their own applications.
What are the two primary methods used to ensure there is a hostname-to-IP address lookup available for a newly deployed cloud application?
Please select 2 correct answers
The two primary methods of implementing name lookup service for cloud applications is either to create a new address record directly on the enterprise DNS servers or to configure the enterprise DNS servers with an alias record to an address record that exists on the cloud provider’s DNS servers.
Which cloud service is specific to one company that owns both the tools/infrastructure that creates the cloud and the people that use the services?
A private cloud is defined as a service that is private to a single company that owns and operates the infrastructure and includes the people that will be requesting and using the services offered. A public cloud, on the other hand, is a service that is owned and operated by a third party and the people that request and use the service can be from a number of different companies.
Which cloud service model provides access to an application that is built, monitored, and offered by the cloud provider?
Software as a Service (SaaS) is likely one of the most publicly used services on the modern Internet. Common examples include iCloud, Google Drive, Dropbox, Office 365, and many more. When using a SaaS, the customer doesn’t need to deal with any hardware or software issues that come up as part of the host system; they only need to handle issues related to the specific service being provided
A _________ is a virtual instance of a traditional networking device that a consumer can use in a cloud.
A virtual network function (VNF) is a virtual instance of a traditional networking device that a consumer can use in a cloud. This type of solution is an alternative to a networking service that is ordered by the consumer but is created and managed by the cloud provider.
Which of the following best describes a virtual network function in a public cloud service?
A virtual network function (VNF) is a virtual version of a networking appliance, such as a virtual router (like the Cisco CSR) or virtual firewall (like the Cisco ASAv). VNFs are deployed as a VM, with customer access to the user interface, so that customers can then configure the VNF to meet their needs. Cloud providers can implement many networking services that create the cloud network, but not give the customer direct access to the VM or appliance. For instance, public cloud providers typically provide DNS services and address assignment services that use DHCP behind the scenes, but without giving the customer direct access to a VM that implements a DNS or DHCP server.
Which of the following cloud services is most likely to be purchased and then used to later install your own software applications?
IaaS (Infrastructure as a Service) supplies one or more working virtual machines (VM), optionally with an OS installed, as a place where you can then customize the systems by installing your own applications. Software as a Service (SaaS) supplies a predefined software application, but typically with no ability to then later install your own applications. Platform as a Service (PaaS) could be used to install your own application, because PaaS does supply one or more VMs, but it is most likely used as a software development environment, a service designed specifically to be used for development, with VMs that include various tools that are useful for software development. Finally, SLBaaS (Server Load Balancing as a Service) can be offered as a cloud service, but it is not a general service in which customers get access to VMs on which they can then install their own applications.
What is the name of the Cisco virtualization offering that can be used to completely replace the functionality of the VMware vSwitch?
Many of the different virtualization solutions offer the ability to completely replace some of their built-in functionality with the functionality offered by a third party; in this case, Cisco has developed the Nexus 1000v virtual switch solution with the capability to replace the built-in VMware vSwitch.
Each virtual OS instance that exists on a server is referred to as a ___________
In virtualization a virtual machine (VM) is a single instance of an operating system (OS).
Which cloud service model is primarily targeted toward the software development community and provides the ability to not only customize the hardware being virtualized but also offer different development tools and utilities that are commonly used for a specific environment?
Platform as a Service (PaaS) is a very popular cloud offering as it provides for a dynamic environment that can be used by developers to both code and test their specific solutions. A common problem before PaaS was that developers had to build specific hardware/software environments that would be used to emulate each specific customer demographic to ensure that their solutions would work correctly. With PaaS, now these environments can be quickly created and be used to test solutions much more efficiently.
An enterprise plans to start using a public cloud service, and is considering different WAN options. The answers list four options under consideration. Which one option has the most issues if the company chooses one cloud provider but then later wants to change to use a different cloud provider instead?
It is typical for server processors to utilize a technique that allows each physical processing core to be split into a number of virtual cores; this is commonly referred to as __________.
One of the many different ways that processor manufacturers have enabled more efficient use of their processors is by supporting technologies like multi-threading that allow each physical core to be split into separate virtual cores that can be tasked by the operating system or operating systems (virtualized) that use it.
