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NEW QUESTION # 55
Which two statements about NETCONF are true? (Choose two.)
Answer: C,D
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 C are 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.
Reference:
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
NEW QUESTION # 56
What is the correct sequence for Python script execution?
Answer: D
Explanation:
Python follows a specific execution flow when a script is run:
The code is interpreted:
Python is an interpreted language, meaning that the Python interpreter reads the code line by line. When a Python script is executed, the interpreter first reads the source code.
The code is translated to bytecode:
After interpreting the source code, Python translates it into bytecode. Bytecode is an intermediate representation of the source code that is portable and efficient for execution by the Python Virtual Machine (PVM).
The bytecode is executed in runtime:
Finally, the Python Virtual Machine (PVM) executes the bytecode. The PVM is a part of the Python runtime environment, responsible for interpreting the bytecode into machine-specific instructions for execution.
Hence, the correct sequence is: interpreted → translated to bytecode → bytecode executed in runtime.
Why the Other Options Are Incorrect:
Options A, C, and D present an incorrect order of the script execution process, especially in how bytecode is generated and executed.
Reference:
Python's documentation on the interpreter and its execution model explains this standard process.
NEW QUESTION # 57
A REST API client uses which two HTTP methods to execute RPC requests on the server? (Choose two.)
Answer: B,C
Explanation:
REST APIs use HTTP methods to perform different operations on resources. In the context of RPC (Remote Procedure Call) requests:
GET: This method is used to retrieve data from the server. In a REST API, it is commonly used to fetch information about resources, such as the current configuration or operational state.
POST: This method is used to send data to the server to create or update a resource. In the context of RPC, POST is often used to execute a procedure on the server that may result in the modification of a resource or triggering of an action.
Options B (HEAD) and D (CONNECT) are not typically used for executing RPC requests:
HEAD is similar to GET but only retrieves the headers, not the body of the response.
CONNECT is used to establish a tunnel to the server, primarily for SSL-encrypted communication, and is not commonly associated with RESTful RPC operations.
Supporting Reference:
Juniper Networks REST API Documentation: The documentation provides detailed information about the use of HTTP methods in Juniper's RESTful services.
"RESTful Web Services" by Leonard Richardson and Sam Ruby: This book explains the principles of REST and how different HTTP methods, particularly GET and POST, are used to interact with RESTful APIs.
NEW QUESTION # 58
You are asked to develop an on-box Junos script that prevents deletion of the SNMP configuration.
Which type of script serves this purpose?
Answer: B
Explanation:
A commit script in Junos is used to enforce policies and configuration constraints on the device. These scripts are written in Extensible Stylesheet Language Transformations (XSLT) or Python and are executed automatically during the commit process of a configuration change.
In this context, to prevent the deletion of the SNMP configuration, a commit script is the appropriate choice. It can be designed to check the configuration changes being committed and reject any commit that attempts to delete or modify the SNMP configuration. This script essentially acts as a gatekeeper, ensuring that only allowable changes are committed to the device configuration.
Supporting Reference:
Juniper Networks Commit Scripts Documentation: The official Juniper documentation provides examples and use cases of commit scripts, including how they can be used to prevent unauthorized changes to the device configuration.
"Junos Automation Scripting" by Jonathan Looney: This resource gives practical examples and best practices for creating commit scripts to enforce configuration policies in Junos OS.
NEW QUESTION # 59
Exhibit.
Referring to the exhibit, which statement about REST is correct?
Answer: A
NEW QUESTION # 60
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