Cisco 300-550 Online Practice Questions and Exam Preparation

Cisco 300-550 Online Questions & Answers

• Question 81:

  Which feature enables service function chaining to steer traffic to virtual network functions?

  A. GRE B. VXLAN
  C. EH
  D. NSH
  E. REST
  D. NSH

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  Reference: https://www.opennetworking.org/images/stories/downloads/sdn-resources/onf-specifications/L4-L7_Service_Function_Chaining_Solution_Architecture.pdf

• Question 82:

  DRAG DROP

  Drag and drop the technology on the left to its appropriate use case on the right.

  Select and Place:

  

  

• Question 83:

  Which two protocols are examples of southbound APIs? (Choose two.)

  A. VXLAN-GPE
  B. LLDP
  C. NETCONF
  D. IPFIX
  E. SYSLOG
  F. OpFlex
  C. NETCONF
  F. OpFlex

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  Communication between the controller and network devices, ACI supports OpFlex and RESTful API for the southbound protocols.

  Reference: http://www.networkcomputing.com/networking/understanding-openflow-vxlan-and-ciscos-aci/551182896

• Question 84:

  You are developing a YANG data model to represent the functionality of a new network application. Which two YANG statements do you use to organize the model into a hierarchy? (Choose two.)

  A. module
  B. grouping
  C. submodule
  D. augment
  E. container
  D. augment
  E. container

  ---

  Organization - Leaf, leaf-list, container, lists, grouping, choice

  Reference: https://tools.ietf.org/html/rfc6244

• Question 85:

  Which authentication method can be used to access the ACI APIC controller?

  A. REST API using HTTP and header-based authentication
  B. REST API using HTTPS and JSON-formatted username/password payload
  C. SOAP API using header-based authentication
  D. SOAP API using SSL and header-based authentication
  B. REST API using HTTPS and JSON-formatted username/password payload

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  The APIC controller serves as an unified interface for the ACI fabric. The all interactions with the APIC leverage a RESTful API that, as depicted in Figure 6-5, can be accessed by tools provide by Cisco, such as the default GUI, or third party applications, for example, Cisco CloudCenter or Python scripts. The single RESTful interface provides uniformity of both the RESTful call and the provided data.

  Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/kb/b_KB_Signature_Based_Transactions.html

• Question 86:

  Which two parts are required for a RESTful API call? (Choose two.)

  A. resource
  B. parameter
  C. method
  D. query
  E. fragment
  A. resource
  C. method

• Question 87:

  Refer to the exhibit. A network engineer created a Bash script to automate some network device tasks. What are two potential risks when a network operator runs this script as written? (Choose two.)

  

  A. The script results in network devices losing connectivity.
  B. The script executes too slowly.
  C. The script configures unintended commands.
  D. The script exposes users' passwords.
  E. The script passes configuration data in cleartext.
  B. The script executes too slowly.
  C. The script configures unintended commands.

• Question 88:

  What are two node types in a YANG data model? (Choose two.)

  A. grouping
  B. leaf
  C. container
  D. module
  E. instance
  B. leaf
  C. container

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  The nodes types (for data modeling) are: leaf node - contains a single value of a specific type container node - contains a grouping of related nodes containing only child nodes, which can be any of the four node types

  Reference: http://www.cisco.com/c/en/us/td/docs/iosxr/ncs5000/DataModels/b-Datamodels-cg-ncs5000/b-Datamodels-cg-ncs5000_chapter_00.html

• Question 89:

  After completing the OCS setup wizard, the configuration does not get applied. Which two log files should you check to determine the errors that occurred? (Choose two.)

  A. /var/log/node_config_state.log
  B. /var/log/platform_services.log
  C. /var/log/ansible.log
  D. /var/log/messages.log
  E. /var/log/controller.log
  B. /var/log/platform_services.log
  C. /var/log/ansible.log

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  Step 5 Complete the setup wizard:

  Click Submit Cluster Configuration.

  If configuration does not complete:

  Check ansible.log and platform_services.log (located in the /var/log/ directory) to determine the errors that took place and make the necessary fixes.

• Question 90:

  Which YANG statement defines a block of other statements that can be easily referenced in other areas of a data model?

  A. grouping
  B. container
  C. submodule
  D. module
  D. module

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  module: A YANG module defines a hierarchy of nodes that can be used for NETCONF-based operations. With its definitions and the definitions it imports or includes from elsewhere, a module is self-contained and "compilable".

  Reference: https://tools.ietf.org/html/rfc6020