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- CCNA Routing and Switching 200-105
141.
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?
- A.Using private WAN connections directly to the cloud provider
- B.Using an Internet connection without VPN
- C.Using an intercloud exchange
- D.Using an Internet connection with VPN
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| Both options that use the Internet allow for easier migration because public cloud providers typically provide easy access over the Internet. An intercloud exchange is a purpose-built WAN service that connects to enterprises as well as most public cloud providers, with the advantage of making the cloud migration process easier. The one correct answer—the worst option in terms of being prepared for migrating to a new cloud provider—is to use a private WAN connection to one cloud provider. While useful in other ways, migrating when using this strategy would require installing a new private WAN connection to the new cloud provider. |
142.
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.)
- A.Using private WAN connections directly to the cloud provider
- B.Using an Internet connection without VPN
- C.Using an intercloud exchange
- D.Using an Internet connection with VPN
- Answer & Explanation
- Report
Answer : [A and C]
Explanation :
Explanation :
| 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. |
143.
Which of the following best describes a virtual network function in a public cloud
service?
- A.A subset of a physical networking device, configured by the cloud provider and allocated for use by that customer only
- B.A networking function implemented by the cloud provider for the customer, but with no direct customer access to the server that provides the service
- C.A networking function implemented by the cloud provider for the customer as a VM that is directly accessible and configurable by the customer
- D.Any networking feature implemented on a VM in a cloud service
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
|
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. |
144.
A Layer 2 switch examines a frame’s destination MAC address and chooses to forward that frame out port G0/1 only. That action is an action that occurs as part of
which plane of the switch?
- A.Data plane
- B.Management plane
- C.Control plane
- D.Table plane
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| The data plane includes all networking device actions related to the receipt, processing, and forwarding of each message, as in the case described in the question. The term table plane is not used in networking. The management plane and control plane are not concerned with the per-message forwarding actions. |
145.
A router uses EIGRP to learn routes and adds those to the IPv4 routing table. That
action is an action that occurs as part of which plane of the switch?
- A.Data plane
- B.Management plane
- C.Control plane
- D.Table plane
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| The control plane includes all networking device actions that create the information used by the data plane when processing messages. The control plane includes functions like IP routing protocols and Spanning Tree Protocol (STP). The term table plane is not used in networking. The management plane and data plane are not concerned with collecting the information that the data plane then uses. |
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