200-301 practice questions 1,051–1,060

1. Question 1051 · 1334 in bank

   Which configuration management mechanism uses TCP port 22 by default when communicating with managed nodes?

   • AAnsible
   • BPython
   • CPuppet
   • DChef

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   Answer: A

   Explanation

   Ansible: - uses SSH (port 22) for remote device communication - uses YAML for fundamental configuration Chef: - uses TCP port 10002 for configuration push jobs - uses Ruby for fundamental configuration elements Puppet: - uses TCP 8140 for communication - fundamental configuration elements are stored in a manifest

   Source: Adapted from community discussion — ZayaB

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2. Question 1052 · 1334 in bank

   Under which condition is TCP preferred over UDP?

   • AUDP is used when low latency is optimal, and TCP is used when latency is tolerable.
   • BTCP is used when dropped data is more acceptable, and UDP is used when data is accepted out-of-order.
   • CTCP is used when data reliability is critical, and UDP is used when missing packets are acceptable.
   • DUDP is used when data is highly interactive, and TCP is used when data is time-sensitive.

   Show answer

   Answer: C

   Explanation

   C is correct for the current question context "Under which condition is TCP preferred over UDP?". However, A will be the answer for alternative question context of "Under which condition is UDP preferred over TCP?". Be ware

   Source: Adapted from community discussion — ismatdmour

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3. Question 1053 · 1334 in bank

   What does an SDN controller use as a communication protocol to relay forwarding changes to a southbound API?

   • AJava
   • BREST
   • COpenFlow
   • DXML

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   Answer: C

   Explanation

   How Do SDN Southbound APIs Work? Southbound APIs facilitate control over the network and enable the SDN Controller to dynamically make changes according to real-time demands and needs. OpenFlow, which was developed by the Open Networking Foundation (ONF), is the first and probably most well-known southbound interface. OpenFlow defines the way the SDN Controller should interact with the forwarding plane to make adjustments to the network, so it can better adapt to changing business requirements. With OpenFlow, entries can be added and removed to the internal flow-table of switches and routers to make the network more responsive to real-time traffic demands.

   Source: Adapted from community discussion — Aleks123

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4. Question 1054 · 1334 in bank

   What uses HTTP messages to transfer data to applications residing on different hosts?

   • AOpenStack
   • BOpFlex
   • CREST
   • DOpenFlow

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   Answer: C

   Explanation

   C is correct. Explanation: A RESTful API is an architectural style for an application program interface (API) that uses HTTP requests to access and use data. That data can be used to GET, PUT, POST and DELETE data types, which refers to the reading, updating, creating and deleting of operations concerning resources. https://searchapparchitecture.techtarget.com/definition/RESTful-API

   Source: Adapted from community discussion — dicksonpwc

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5. Question 1055 · 1334 in bank

   Which JSON data type is an unordered set of attribute-value pairs?

   • Astring
   • Barray
   • CBoolean
   • Dobject

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   Answer: D

   Explanation

   JSON Object : An object is an unordered set of name/value pairs. An object begins with { (left brace) and ends with } (right brace). Each name is followed by : (colon) and the name/value pairs are separated by , (comma). JSON Array : An array is an ordered collection of values. An array begins with [ (left bracket) and ends with ] (right bracket). Values are separated by , (comma).

   Source: Adapted from community discussion — MikD4016

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6. Question 1056 · 1334 in bank

   Which protocol is used in Software Defined Access (SDA) to provide a tunnel between two edge nodes in different fabrics?

   • AGeneric Router Encapsulation (GRE)
   • BVirtual Local Area Network (VLAN)
   • CVirtual Extensible LAN (VXLAN)
   • DPoint-to-Point Protocol (PPP)

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   Answer: C

   Explanation

   VXLAN is a network encapsulation technique used in modern data center environments and Software Defined Networking (SDN) architectures, including SDA. It is designed to enable scalable and flexible network virtualization by encapsulating Layer 2 Ethernet frames in UDP (User Datagram Protocol) packets. In SDA, VXLAN is employed to create an overlay network that can span across different fabrics and provide connectivity between edge nodes in a scalable and efficient manner. VXLAN helps overcome the limitations of traditional VLAN-based networks and allows for more dynamic and automated provisioning of network services in a software-defined environment.

   Source: Adapted from community discussion — Cynthia2023

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7. Question 1057 · 1334 in bank

   Which plane is centralized by an SDN controller?

   • Amanagement-plane
   • Bdata-plane
   • Cservices-plane
   • Dcontrol-plane

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   Answer: D

   Explanation

   B is correct. SDN Architecture The SDN control plane is centralized while the data plane is distributed. The centralized nature of the control plane makes the network flexible and enhances flow forward decision-making. The SDN controller resides in the control plane of an SDN architecture that can be programmed externally.

   Source: Adapted from community discussion — dicksonpwc

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8. Question 1058 · 1334 in bank

   Where is the interface between the control plane and data plane within the software-defined architecture?

   • Aapplication layer and the management layer
   • Bapplication layer and the infrastructure layer
   • Ccontrol layer and the application layer
   • Dcontrol layer and the infrastructure layer

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   Answer: D

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9. Question 1059 · 1334 in bank

   Why would a network administrator choose to implement automation in a network environment?

   • ATo simplify the process of maintaining a consistent configuration state across all devices
   • BTo centralize device information storage
   • CTo implement centralized user account management
   • DTo deploy the management plane separately from the rest of the network

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   Answer: A

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10. Question 1060 · 1334 in bank

    Select 2

    Which two events occur automatically when a device is added to Cisco DNA Center? (Choose two.)

    • AThe device is placed into the Managed state.
    • BThe device is placed into the Unmanaged state.
    • CThe device is assigned to the Local site.
    • DThe device is assigned to the Global site.
    • EThe device is placed into the Provisioned state.

    Show answer

    Answer: AD

    Explanation

    Device in Global Site: When you successfully add, import, or discover a device, Cisco DNA Center places the device in the Managed state and assigns it to the Global site by default. So I believe the answer is A and D.

    Source: Adapted from community discussion — Wong93

    References

    • Cisco documentation
    • Cisco documentation

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200-301 practice, question 1051. 1334 questions available.