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What is the purpose of the Cisco VIRL software tool?
Cisco VIRL (Virtual Internet Routing Lab) is a powerful network simulation platform designed to simulate and model networks. It allows users to create and test network topologies, run simulations, and visualize network behavior in a controlled virtual environment. This tool is particularly valuable for network engineers and administrators to test configurations, troubleshoot issues, and validate network designs without the need for physical hardware.
A developer is developing a web application that uses username and password to authenticate to the next service. The user credentials must be available at any time in the application. The developer must choose and implement a secure method of storing the authentication credentials that are used in the automation code. Which password handling method must be used to minimize the security risk?
To minimize the security risk, storing the username and password in a vault is the best practice. A vault, such as HashiCorp Vault or AWS Secrets Manager, securely stores and manages sensitive information, providing encryption and access control. This approach ensures that credentials are not hard-coded or stored in insecure locations, reducing the risk of exposure.
Which model-driven programmability protocol does Cisco IOS XE Software support?
Cisco IOS XE supports model-driven programmability using protocols such as gNMI (gRPC Network Management Interface). gNMI is a protocol that provides a way to manage and configure network devices using a standardized approach to data models and APIs.
Model-Driven Telemetry: gNMI is used for streaming telemetry data from network devices.
Configuration Management: It allows for the configuration of network devices using standardized YANG models.
A developer is working on a new feature in a branch named 'newfeat123456789' and the current working primary branch is named 'prim987654321'. The developer requires a merge commit during a fast forward merge for record-keeping purposes. Which Git command must be used?
The --no-ff option in the git merge command ensures that a merge commit is always created, even when a fast-forward merge is possible. This is useful for keeping a clear history of feature branches being merged into the main branch.
Fast Forward Merge: By default, Git performs a fast-forward merge if there are no diverging changes. This can result in a linear commit history without a separate merge commit.
Using --no-ff: The --no-ff option forces Git to create a merge commit, preserving the context that a feature branch was merged into the main branch, which is crucial for record-keeping and audit trails.
Refer to the exhibit.
The JSON data in the exhibit has been parsed and stored in a variable, ''data''. What returns the value ''172.16.0.11'' ?
To extract the value '172.16.0.11' from the given JSON data, you need to navigate through the JSON structure using the correct keys and indices. The JSON structure provided is as follows:
'items': [{
'kind': 'object#NetworkObj',
'selfLink': 'https://10.201.230.5/api/objects/networkobjects/db01',
'name': 'db01',
'host': {
'kind': 'IPv4Address',
'value': '172.16.0.11'
},
'objectId': 'db01'
}]
}
Access the 'items' key: This gives you a list containing one object.
Access the first object in the 'items' list: Using the index [0].
Access the 'host' key: This contains the 'kind' and 'value' keys.
Access the 'value' key within the 'host' object: This gives you the required value '172.16.0.11'.
Thus, the correct way to access the value '172.16.0.11' is data['items'][0]['host']['value'].
JSON Parsing in Python: Python JSON Module
Cisco DevNet Documentation: DevNet JSON Handling
