Free Cisco 200-901 Exam Practice Questions & Explanations
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Refer to the exhibit.
A network engineer must copy the ''config.txt'' file from directory TEST to directory PROD. The copied file must also be renamed into ''current.txt''. Which command must be used to accomplish these tasks?
To copy a file from one directory to another and rename it in the process, the cp (copy) command in Linux can be used with the appropriate source and destination paths:
Command Breakdown:
cp: The copy command.
./TEST/config.txt: The source file path.
./PROD/current.txt: The destination file path with the new name.
Thus, the correct command to achieve this task is: cp ./TEST/config.txt ./PROD/current.txt
Linux cp Command Manual
Cisco DevNet Associate Certification Guide
A developer created a new secure API and is testing the functionality locally. The API was added to a container for further testing, and other team members and applications need to connect to the API. Which command exposes the API in the container as port 8443 and allows connections external to the host?
The docker run command is used to create and start a new container from an image. The -p option maps a port on the host to a port in the container.
Port Mapping: The syntax -p [host_ip:host_port:container_port/protocol] is used to map ports.
Exposing Port 8443: The correct mapping to expose the API on port 8443 and allow external connections is 0.0.0.0:443:8443/tcp, which maps port 443 on the host to port 8443 in the container.
Option B correctly maps the ports and allows external connections.
Docker Documentation: Docker Run Reference
What is a function of the default gateway in a network?
A default gateway is a router or network device that serves as an access point to another network, often the internet, when no other route is specified for a given data packet. In other words, it is used to forward traffic from the local subnet to different subnets, including external networks. When a host needs to communicate with a device on a different subnet, it sends the traffic to the default gateway, which then routes the traffic accordingly.
Cisco DevNet Associate Certification Guide
Cisco Networking Essentials, Chapter on Routing and Switching Basics
Users cannot access a webserver and after the traffic is captured, the capture tool snows an ICMP packet that reports "time exceeded in-transit". What is the cause of this webserver access issue?
An ICMP 'time exceeded in-transit' message indicates that the TTL (Time to Live) of a packet has expired. The TTL value is a counter that decreases by one each time the packet passes through a router. When the TTL reaches zero, the packet is discarded, and an ICMP 'time exceeded' message is sent back to the sender. This typically happens when the packet takes too many hops or the destination is too far away, causing the TTL to expire before reaching the destination.
What is a component of the first stage of an application development CI/CD pipeline?
The first stage of a CI/CD (Continuous Integration/Continuous Deployment) pipeline typically involves developers committing and pushing code into a version control system (VCS) such as Git. This stage sets the foundation for subsequent automated processes.
Initial Commit: The act of committing code means saving changes to the local repository.
Push to Repository: Pushing code sends the committed changes to a remote repository, making them available for the CI/CD pipeline to trigger automated processes such as building and testing.
Continuous Integration Fundamentals: CI/CD Overview