Cisco 400-007 Practice Test - Questions Answers, Page 24
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Which SDN architecture component is used by the application layer to communicate with the control plane layer to provide instructions about the resources required by applications?
southbound APIs
northbound APIs
orchestration layer
SDN controller
An enterprise plans to evolve from a traditional WAN network to a software-defined WAN network.
The existing devices have limited capability when it comes to virtualization. As the migration is carried out, enterprise applications and services must not experience any traffic impact. Which implementation plan can be used to accommodate this during the migration phase?
Deploy controllers, deploy SD-WAN edge routers. In the data center, and migrate branch sites.
Migrate data center WAN routers, migrate branch sites, and deploy SD-WAN edge routers.
Migrate branch sites, migrate data center WAN routers, and deploy controllers.
Deploy SD-WAN edge routers in the data center, deploy controllers, and migrate branch sites
Company XYZ was not satisfied with the reconvergence time OSPF is taking. BFD was implemented to try to reduce the reconvergence time, but the network is still experiencing delays when having to reconverge. Which technology will improve the design?
OSPF fast hellos
BFDecho
Change the protocol to BGP
Change the OSPF hello and dead intervals
Company XYZ wants to redesign the Layer 2 part of their network and wants to use all available uplinks for increased performance. They also want to have end host reachability supporting conversational learning. However, due to design constraints, they cannot implement port-channel on the uplinks. Which other technique can be used to make sure the uplinks are in active/active state?
TRILL
LISP
MSTP
switch stack
An engineer must design a network for a company that uses OSPF LFA to reduce loops. Which type of loop would be reduced by using this design?
DTP
micro loops
STP
REP
A key to maintaining a highly available network is building in the appropriate redundancy to protect against failure. This redundancy is carefully balanced with the inherent complexity of redundant systems. Which design consideration is relevant for enterprise WAN use cases when it comes to resiliency?
Design in a way that expects outages and attacks on the network and its protected resources
The design approach should consider simple and centralized management aspect
Design in a way that it simplifies and improves ease of deployment
Design automation tools wherever it is appropriate for greater visibility
Which two factors must be considered for high availability in campus LAN designs to mitigate concerns about unavailability of network resources? (Choose two.)
device resiliency
device type
network type
network resiliency
network size
Which two features are advantages of SD-WAN compared to MPLS-based connectivity? (Choose two.)
uses FEC constructs for traffic forwarding, thereby improving efficiency
separates infrastructure and policy
uses policy-based forwarding of real-time traffic with less complexity
unifies the WAN backbone
manages failures through backup links
What is an architectural framework created by ETSI that defines standards to decouple network functions from proprietary hardware-based appliances and have them run in software on standard x86 servers?
NPIV
NFVIS
NFV
VNF
Which three components are part of the foundational information security principles of the CIA triad? (Choose three.)
cryptography
confidentiality
authorization
identification
integrity
availability
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