Cisco 300-550 Online Practice Questions and Exam Preparation

Cisco 300-550 Online Questions & Answers

• Question 21:

  Which computer security concept is violated when a web server is written that uses the "root" account for all interactions with a Linux system?

  A. RBAC
  B. PermitRootLogin
  C. certificate-based authentication
  D. principle of least privilege
  A. RBAC

• Question 22:

  Which two network configuration protocols use XML as a data representation format? (Choose two.)

  A. NETCONF
  B. CORBA
  C. TOSCA
  D. SNMP
  E. RESTCONF
  A. NETCONF
  E. RESTCONF

  ---

  Data modeling language for the definition of data sent over the NETCONF network configuration protocol.

  RESTCONF Request and response data can be in XML or JSON format. XML has structure according to yang by XML-YANG and JSON by JSON-YANG.

  Reference: https://en.wikipedia.org/wiki/YANG http://sdntutorials.com/what-is-restconf/

• Question 23:

  The Cisco APIC REST API supports which two methods? (Choose two.)

  A. POST
  B. PATCH
  C. PUT
  D. OPTIONS
  E. GET
  F. RESET
  A. POST
  E. GET

  ---

  The API supports HTTP POST, GET, and DELETE request methods

  Reference https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/2-x/rest_cfg/2_1_x/b_Cisco_APIC_REST_API_Configuration_Guide/ b_Cisco_APIC_REST_API_Configuration_Guide_chapter_01.html#concept_21284AACF779429A8E6EEED11D143716

• Question 24:

  Which two statements about the NX-API are true? (Chose two.)

  A. NX-API supports XML-RPC
  B. NX-API is enabled by default
  C. NX-API supports JSON-RPC
  D. The nxapi_auth cookie expires in 30 minutes.
  E. NX-API maps to NX-OS NETCONF.
  A. NX-API supports XML-RPC
  C. NX-API supports JSON-RPC

  ---

  NX-API is an enhancement to the Cisco Nexus 9000 Series CLI system, which supports XML output. NX-API also supports JSON output format for specific commands.

  Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus7000/sw/programmability/guide/b_Cisco_Nexus_7000_Series_NX-OS_Programmability_Guide/b_Cisco_Nexus_7000_Series_NXOS_Programmability_Guide_chapter_0101.html

• Question 25:

  In ACI, where is a concrete object in the MIT most often located?

  A. hypervisor DB
  B. integrated Layer 4 to Layer 7 device
  C. switch ASIC
  D. leaf or spine
  C. switch ASIC

  ---

  Resolved = created by the APIC as a unit/object to communicate and pass information to the switches Concrete = objects used by the switches to program hardware

  Reference: https://clnv.s3.amazonaws.com/2015/usa/pdf/BRKACI-2101.pdf

• Question 26:

  DRAG DROP

  Drag and drop the tools on the left to their corresponding functions on the right.

  Select and Place:

  

  

• Question 27:

  What is an advantage of using SDK?

  A. to deconstruct the low-level object model
  B. to develop useful code quickly by using abstractions
  C. to learn the underlying service that is exposed by an API
  D. to create a flexible applications framework
  D. to create a flexible applications framework

• Question 28:

  What is the main benefit of having an out-of-band management network for an infrastructure controller?

  A. Data plane disruption is less likely.
  B. It provides separation on the management and data planes.
  C. Configuration of the controller is faster and simpler
  D. It is less expensive.
  D. It is less expensive.

  ---

  Out-of-band management is presented as a more efficient way to cut costs and improve service levels and productivity.

  Reference: http://www.it-administrator.de/download/whitepapers/Avocent_OutofBandManagement_WP.pdf

• Question 29:

  Which statement indicates that an element in a YANG data model contains data that describes operational state information about the device or service?

  A. state true
  B. config false
  C. mode state
  D. state enabled
  D. state enabled

• Question 30:

  Which network configuration protocol uses JSON as a data representation format?

  A. NETCONF
  B. SOAP
  C. RESTCONF
  D. HTML
  C. RESTCONF

  ---

  JSON-RPC is an RPC protocol built on JSON, as a replacement for XML-RPC or SOAP. It is a simple protocol that defines only a handful of data types and commands. JSON-RPC lets a system send notifications (information to the server that does not require a response) and multiple calls to the server that can be answered out of order. Example of a JSON-RPC 2.0 request and response using positional parameters.

  Reference: https://tools.ietf.org/html/draft-ietf-netconf-restconf-13#section-1.1.1 5.3.2 https://tools.ietf.org/html/draft-box-http-soap-00 XML payload format in SOAP