Cisco 300-550 Online Practice Questions and Exam Preparation

Cisco 300-550 Online Questions & Answers

• Question 1:

  An organization leverages a multivendor network to sell connectivity services using Layer 3 VPN and VPLS. Where possible, the organization wants to use common APIs across vendors, in order to automate the configuration of network services. Which technology should be organization consider for the southbound interface?

  A. BGP-LS
  B. OpFlex
  C. OpenFlow
  D. NETCONF
  E. PCEP
  A. BGP-LS
  D. NETCONF
  E. PCEP

  ---

  Other technologies for southbound interfaces, such as NETCONF, YANG, PCEP, and BGP-LS, also allow controllers to centrally control networks.

  Reference: https://www.google.com/url?sa=tandrct=jandq=andesrc=sandsource=webandcd=1andved=0ahUKEwiw1-vLu7nOAhXBAxoKHZUrCp4QFggcMAAandurl=http%3A%2F%2Fwww-file.huawei.com%2F~%2Fmedia%2FCNBG%2FDownloads%2FTechnical% 2520Topics%2FFixed%2520Network%2FWP-SDN%2520WAN%2520V12-ENandusg=AFQjCNHnjUfA7rYGbt2g4W5Kni1gJDyNnwandsig2=h9HG66D_RfmkWb0zw_7uZQandbvm=bv.129422649,d.bGsandcad=rja

• Question 2:

  What is an advantage of using a virtual Cisco Nexus 9000 (NX-OSv) over a traditional Cisco Nexus 9000 for testing purposes?

  A. lower cost
  B. higher performance
  C. more available ports
  D. higher throughput
  A. lower cost

• Question 3:

  How do you access the APIC-EM Grapevine developer console?

  A. https://controller IP address>/devconsole
  B. https://controller IP address>:41000
  C. https://controller IP address>/grapevinedev
  D. https://controller IP address>:14141
  D. https://controller IP address>:14141

  ---

  Reference: https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/application-policy-infrastructure-controller-enterprise-module/1-0-x/deploy-guide/b_apic-em_deploy_guide_v_1_0_0_x/b_apicem_deploy_guide_v_1_0_0_x_chapter_0110.html

• Question 4:

  A web service returns a JSON object to your Python script. What is the most logical object in which to store the JSON response?

  A. an integer
  B. a dictionary
  C. a tuple
  D. a string
  E. a list
  B. a dictionary

• Question 5:

  Which service does a VIRL host use to validate a license?

  A. Puppet
  B. Ansible
  C. Chef
  D. SaltStack
  D. SaltStack

  ---

  Step 9:Activate VIRL Don't' be alarmed.

  Until you successfully connect to Cisco's SaltStack infrastructure and validate your VIRL license you can expect to encounter a number of 'Failed to...' error messages. Unless these occur after Step 22 they can safely be ignored.

  Reference http://virl-dev-innovate.cisco.com/vs.client.php

• Question 6:

  RESTCONF supports which two resources? (Choose two.)

  A. /restconf/data
  B. /restconf/operations
  C. /restconf/diagnostic
  D. /restconf/performance
  E. /restconf/fault
  A. /restconf/data
  B. /restconf/operations

  ---

  YANG Tree Diagram for an API Resource:

  +--rw restconf

  +--rw data

  +--rw operations

  +--ro yang-library-version

  Reference:

  https://yumaworks.freshdesk.com/support/solutions/articles/1000229884-what-restconf-features-are-supported-by-yumapro-sdk- https://tools.ietf.org/html/draft-ietf-netconf-restconf-14#section-3.3

• Question 7:

  Which communication mechanism does NETCONF use?

  A. SOAP over HTTPS
  B. YAML over SSH
  C. YAML over HTTPS
  D. RPC over SSH
  D. RPC over SSH

  ---

  NETCONF uses a simple RPC-based mechanism to facilitate communication between a client and a server. The client can be a script or application typically running as part of a network manager. The server is typically a network device. The terms "device" and "server" are used interchangeably in this document, as are "client" and "application".

  Reference: https://tools.ietf.org/html/rfc6241

• Question 8:

  Which two installable packages does the Cisco API Python SDK require? (Choose two.)

  A. ciscoasi
  B. acimodel
  C. modpy-aci
  D. acicobra
  E. ciscopython
  F. aci-toolkit
  B. acimodel
  D. acicobra

  ---

  Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/api/python/install/b_Install_Cisco_APIC_Python_SDK_Standalone.html

• Question 9:

  Which command tests a REST API?

  A. nc
  B. tcpdump
  C. curl
  D. telnet
  C. curl

  ---

  Test your REST api from the command line, you can use curl.

  Reference: https://developer.cisco.com/site/devnet/learn/coding-101-tutorial/index.gsp#apic-em-example:-get-hosts

• Question 10:

  How is a service ticket used when constructing a Cisco APIC-EM API request?

  A. to identify the service type
  B. to identify a service on the controller
  C. to determine the request type
  D. as a security token
  D. as a security token