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Cisco® 300-550 Exam Practice Questions (P. 5)

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Question #21
Management protocols like NETCONF access network elements on well-known ports. Which design practice hardens a network device implementation?
  1. A
    Specify the source interface for SSH
  2. B
    Limit access to port 830, well-known clients, and SSH VTY.
  3. C
    Enable CoPP.
  4. D
    Configure ip http secure-server.

Correct Answer:
A
The management plane is used in order to access, configure, and manage a device, as well as monitor its operations and the network on which it is deployed. The management plane is the plane that receives and sends traffic for operations of these functions. You must secure both the management plane and control plane of a device, because operations of the control plane directly affect operations of the management plane. This list of protocols is used by the management plane:
✑ Simple Network Management Protocol
✑ Telnet
✑ Secure Shell Protocol
Reference:
http://www.cisco.com/c/en/us/support/docs/ip/access-lists/13608-21.html

Question #22
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.)
  1. A
    module
  2. B
    grouping
  3. C
    submodule
  4. D
    augment
  5. E
    container

Correct Answer:
DE
Reference:
https://tools.ietf.org/html/rfc6244

Question #23
Which network is used by default for cluster sync between Cisco APICs?
  1. A
    out of band management network
  2. B
    VXLAN overlay network
  3. C
    in-band management network
  4. D
    infra-VTEP network

Correct Answer:
C

Question #24
YANG modeling supports which two comment styles? (Choose two.)
  1. A
    A block comment is enclosed within "<--"and"-->".
  2. B
    A single-line comment starts with "#" and ends at the end of the line.
  3. C
    A single-line comment starts with "!" and ends at the end of the line.
  4. D
    A block comment is enclosed within "/*" and "*/".
  5. E
    A single-line comment starts with "//" and ends at the end of the line.

Correct Answer:
DE
Comments are C++ style. A single line comment starts with "//" and ends at the end of the line. A block comment is enclosed within "/*" and "*/".
Reference:
https://tools.ietf.org/html/draft-ietf-netmod-yang-00

Question #25
A web service returns a JSON object to your Python script. What is the most logical object in which to store the JSON response?
  1. A
    an integer
  2. B
    a dictionary
  3. C
    a tuple
  4. D
    a string
  5. E
    a list

Correct Answer:
A
Reference:
http://www.tutorialspoint.com/json/json_quick_guide.htm

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