300-550 Dumps Which Everyone In The Cisco 300-550 Industry Should Be Using

This exam tests a candidate's knowledge and skills related to Network programmability fundamentals, APIs and automation protocols, data models, operations, and controllers.

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Question: 1

How are authentication credentials sent in a Cisco APIC REST API authorization request?

A. by using OAuth

B. in a token in the header

C. by using Basic Auth

D. in JSON in the payload

Answer: D

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/1-x/api/rest/b_APIC_RESTful_API_User_Guide/b_IFC_RESTful_API_User_Guide_chapter_0100.html

Explanation:

Authentication to the REST API for username/password-based authentication uses a special subset of request URIs, including aaaLogin, aaaLogout and aaaRefresh as the Dn target of a POST operation. Their payloads contain a simple XML or JSON payload containing the MO representation of an aaaUser object with attributes name and pwd defining the username and password, for example: <aaaUser name=’admin’ pwd=’insieme’/>. The response to the POSTs will contain an authentication token as both a Set-Cookie header as well as an attribute to the aaaLogin object in the response named token, for which the XPath is /imdata/aaaLogin/@token if encoded as XML. Subsequent operations on the REST API can use this token value as a Cookie named “APIC-cookie” to have future requests authenticated.

Reference:

http://aci-troubleshooting-book.readthedocs.io/en/latest/rest.html

Question: 2

Which two statements about OpenFlow are true? (Choose two.)

A. The OpenFlow flow table contains header fields, counters, and actions.

B. OpenFlow automatically determines network forwarding rules.

C. OpenFlow interfaces with the management plane.

D. OpenFlow is a southbound protocol.

E. OpenFlow is an agentless technology, like Ansible.

F. OpenFlow is a northbound protocol.

Answer: AD

Reference:

For A, http://archive.openflow.org/documents/openflow-spec-v1.0.0.pdf

For D, https://learninglabs.cisco.com/lab/restconf-101/step/3

Reference:

http://archive.openflow.org/documents/openflow-spec-v1.0.0.pdf

Question: 3

Where is the node-ui.log stored on the Cisco APIC-EM appliance?

A. in the /var/Iog/grapevine/services/node-ui directory within the container that is running the node-ui instance

B. in the Cassandra database instance that is running within the container that is running the node-ui instance

C. in the /opt/CSCOapicem/logs/node-ui directory within the Cisco APIC-EM appliance root

D. in the /var/log/grapevine/services/node-ui directory within the Cisco APIC-EM appliance root

E. in the Cisco APIC-EM Cassandra database instance

Answer: D

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