Cisco 200-901 - DevNet Associate (DEVASC)

REST APIs are designed around resources that are identified by URLs. Operations are performed on these resources using standard HTTP methods like GET, POST, PUT, and DELETE. In contrast, RPC (Remote Procedure Call) APIs are designed around actions or operations, where the focus is on invoking methods or functions rather than manipulating resources.

When conflicts occur during a merge, the git merge --abort command can be used to stop the merge process and revert the repository to its state before the merge began.

Merge Conflicts: Occur when changes from different branches cannot be automatically reconciled.

Abort Merge: git merge --abort undoes the merge process and restores the pre-merge state of the repository.

Option D is correct as it correctly uses the git merge --abort command to revert to the pre-merge state.

DNS (Domain Name System) is the technology responsible for matching a name to an IP address of an application running on a host. When a user types a domain name into a browser, DNS translates that domain name into the corresponding IP address, enabling the user's device to connect to the server hosting the application.

References:

Cisco DevNet Documentation - DNS

Cisco DevNet Associate Certification Guide

When you run the git add . command, the changes are moved to the staging area. The git diff command, by default, shows differences between the working directory and the last commit. Since the changes have been staged, git diff will not show any differences because it is comparing the working directory to the last commit, not the staging area. To see the changes that have been staged, you need to use the git diff --staged command, which compares the staged changes with the last commit.

References:

Pro Git Book, Chapter 2: Git Basics - Recording Changes to the Repository

Git Documentation

The Bash script provided in the exhibit performs two find commands:

find /home/user/backup -mtime +30 -type f -print: This command searches for files in the /home/user/backup directory that have been modified more than 30 days ago and prints their names.

find /home/user/backup -mtime +30 -type f -delete: This command searches for files in the /home/user/backup directory that have been modified more than 30 days ago and deletes them.

Thus, the workflow being automated by this Bash script is the deletion of backup files that are older than 30 days.

References:

GNU find Documentation

Cisco DevNet Associate Certification Guide

The provided script sends a POST request to the Meraki API endpoint to add a new media server for monitoring. The payload includes the name and address of the media server, indicating that the action being automated is the addition of a media server to the monitoring list.

The observer pattern is designed to create a relationship where an object (subject) maintains a list of its dependents (observers) and notifies them of any state changes. This pattern achieves loose coupling between the subject and its observers, allowing them to interact without being tightly bound to each other. This flexibility ensures that changes in the subject do not heavily impact the observers, and vice versa.

Cisco Modeling Labs (CML) is a network simulation tool that allows users to create, configure, and simulate networks with Cisco devices and topologies.

Cisco Modeling Labs (CML): CML provides a virtual environment where users can simulate network topologies and devices, including routers, switches, and other network components.

Simulation and Testing: CML allows users to test configurations, troubleshoot network issues, and study network behavior in a controlled environment.

References:

Cisco Modeling Labs: Cisco Modeling Labs