Question # 1
| Which two statements about NETCONF are true? (Choose two.) | | A. It uses the operations layer to lock the configuration of a Junos device. | | B. It uses the messages layer to commit the configuration of a Junos device. | | C. It uses the messages layer to lock the configuration of a Junos device. | | D. It uses the operations layer to commit the configuration of a Junos device. |
A. It uses the operations layer to lock the configuration of a Junos device.
D. It uses the operations layer to commit the configuration of a Junos device.
Explanation:
NETCONF (Network Configuration Protocol) operates through different layers, with the operations layer being particularly important for managing configurations:
Operations Layer (A & D): This layer is responsible for actions like locking and committing the configuration on a Junos device. The lock operation prevents other sessions from modifying the configuration, and the commit operation applies the configuration changes to the device.
Options B and Care incorrect because the messages layer handles the communication aspects, such as exchanging data between the client and server, not performing configuration operations like locking and committing.
IETF RFC 6241 (NETCONF): Describes the protocol layers and their functions, with a focus on the operations layer.
Juniper Networks NETCONF Documentation: Provides insights into how NETCONF operations are managed in Junos
Question # 2
| What is the difference between a list and a tuple in Python? | | A. Lists are immutable objects thatuse square brackets, and tuplesare mutable objects that use parentheses. | | B. Lists are mutable objects that use square brackets, and tuples are immutable objects that use parentheses. | | C. Lists are immutable objects that use parentheses, and tuples are immutable objects that use square brackets. | | D. Lists are mutable objects that use parentheses, and tuples are immutable objects that use square brackets. |
B. Lists are mutable objects that use square brackets, and tuples are immutable objects that use parentheses.
Explanation:
In Python, the distinction between lists and tuples is essential for efficient programming:
Lists:
Mutable (B): This means that once a list is created, its elements can be changed, added, or removed. Lists are versatile and commonly used when the data is expected to change.
Square Brackets: Lists are defined using square brackets[].
Example:
my_list = [1, 2, 3]
my_list[0] = 10 # Modifying the first element
Tuples:
Immutable (B): Once a tuple is created, it cannot be altered. Tuples are used when a fixed collection of items is needed, providing more integrity to the data.
Parentheses: Tuples are defined using parentheses().
Example:
my_tuple = (1, 2, 3)
# my_tuple[0] = 10 # This would raise an error because tuples are immutable
Python Official Documentation: The Python Language Reference provides detailed information on data types like lists and tuples, including their mutability and syntax.
Automation Scripts: In the context of automation, understanding when to use mutable or immutable data structures can significantly impact script performance and reliability.
Question # 3
| Which two statements are true about an XML schema document? (Choose two.) | | A. It is formatted as an XLT file. | | B. It cannot be examined in the Junos CLI. | | C. It is an authoritative source for operational and configuration XML. | | D. lit is formatted as an XSD file. |
C. It is an authoritative source for operational and configuration XML.
D. lit is formatted as an XSD file.
Explanation:
An XML schema document (XSD) is a key component in defining the structure and constraints of XML data used in various applications, including Junos:
Authoritative Source (C): An XML schema document serves as the authoritative definition of the structure, content, and semantics of XML documents. It ensures that the XML data adheres to specific rules and formats, which is essential for both operational and configuration XML.
XSD Format (D): XML schema documents are typically written in the XSD (XML Schema Definition) format, which provides a formal description of the XML document's structure.
Option A is incorrectbecause XML schemas are not formatted as XLT files (which are related to XSLT transformations), andOption B is incorrectbecause XML schemas can indeed be examined in the Junos CLI using appropriate commands.
W3C XML Schema Definition Language (XSD) Documentation: Provides comprehensive information on the XSD format.
Juniper Networks Documentation: Discusses the role of XML schemas in managing Junos configurations.
Question # 4
| Which type of on-box automation script is designed to run every time a user executes a configuration change? | | A. event | | B. SNMP | | C. commit | | D. operation |
C. commit
Explanation:
In Junos OS, acommit scriptis an on-box automation script that runs every time a configuration change is committed. Commit scripts are used to enforce configuration policies, validate configuration changes, or make automatic adjustments to configurations when certain conditions are met.
Commit Script (C): Executes automatically during the commit process, ensuring that the new configuration adheres to specific rules or conventions before it is applied to the system.
Event, SNMP, and operation scriptsare used for other purposes in Junos automation but do not run automatically with every configuration change.
Junos OS Automation Scripts Guide: Provides details on different types of scripts, including commit scripts, and their use cases.
Juniper Networks Documentation: Offers examples and best practices for creating and using commit scripts.
Question # 5
| You want to use a Python package or module.
In this scenario, which statement would accomplish this task? | | A. reap | | B. dir | | C. input | | D. Import |
D. Import
Explanation:
In Python, to use a package or module, you use theimportstatement. This statement allows you to load a module into your script so that you can use its functions, classes, and variables. For example, if you wanted to use themathmodule, you would writeimport math. This makes all the functions and constants in themathmodule available for use in your program.
Option A (reap), B (dir), and C (input)do not serve the purpose of importing modules.diris used to list the attributes of an object,inputis used to get user input, andreapis not a valid Python command related to importing modules.
Supporting References:
Python Documentation on Imports:The Python documentation provides clear guidelines on how to use theimportstatement to include modules in your Python scripts.
Question # 6
| Which two statements about NETCONF are correct? (Choose two.) | | A. The default port for NETCONF is port 930. | | B. The default port for NETCONF is port 830. | | C. NETCONF cannot use the default SSH port. | | D. NETCONF can use the default SSH port. |
B. The default port for NETCONF is port 830.
D. NETCONF can use the default SSH port.
Explanation:
NETCONF (Network Configuration Protocol) is used for network device management and can operate over SSH. The following are true about NETCONF:
Default Port 830 (B): By default, NETCONF uses port 830 for communication over SSH. This is the standard port reserved for NETCONF sessions.
Use of Default SSH Port (D): NETCONF can also operate over the standard SSH port (port 22) if configured to do so. This allows flexibility in network management scenarios where port 830 might not be available or used.
Options A and C are incorrectbecause they refer to incorrect or non-applicable port numbers for NETCONF.
IETF RFC 6241: Specifies the use of NETCONF over SSH, including port details.
Juniper Networks NETCONF Documentation: Discusses the configuration and operation of NETCONF on Junos devices, including port usage.
Question # 7
| You are asked to use the REST API to retrieve interface configuration information from your Junos device. You decide to use a cURL HTTP GET command to retrieve this information.
In this scenario, which statement is correct? | | A. The request is handled by the mod process runningon the Junos device. | | B. The request is handled by the isrpd process runningon the Junos device. | | C. The request is handled by the rpd process runningon the Junos device. | | D. The request is handled by the isd process runningon the Junos device |
B. The request is handled by the isrpd process runningon the Junos device.
Explanation:
When using the REST API on a Junos device, theisrpd(Integrated Service Routing Process Daemon) process is responsible for handling REST API requests. This process listens for incoming HTTP requests and processes them accordingly, including retrieving interface configuration information when a GET request is made.
Option Bis correct because theisrpdprocess handles the REST API requests on a Junos device.
Options A (mod process), C (rpd process), and D (isd process)are incorrect in this context as they either do not exist or serve different purposes on a Junos device.
Supporting References:
Juniper Networks REST API Documentation:Provides insights into how REST API requests are managed and processed by theisrpdprocess on Junos devices.
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