Networking Basics for DevOps Beginners

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What is a Network?

A network connects devices so they can communicate and share data. Understanding networks is key to managing DevOps systems effectively.

Key Concepts

1. IP Address: The unique identifier for a device in a network, like your home address.
2. DNS (Domain Name System): Converts website names into IP addresses for communication.
3. Ports: Entry/exit points for connections, like specific doors for tasks.
4. Protocols: Rules for data exchange, such as HTTP, HTTPS, and SSH.

Quick Exercises

1. Find Your IP Address:  

Windows: ipconfig
Linux/Mac: ifconfig

1. Check a Domain's IP Address:

nslookup example.com

1. Ping a Server to Test Connection:

ping example.com

Common Ports

HTTP: 80
HTTPS: 443
SSH: 22
DNS: 53

Why It's Important

Understanding networking helps troubleshoot issues, secure systems, and ensure smooth communication between services in DevOps environments.

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