Why Networking is Critical for DevOps
Every DevOps workflow depends on networking — from accessing servers via SSH,
deploying applications, exposing services, to monitoring and alerting.
Understanding networking fundamentals helps you debug issues faster and design reliable systems.
Core Networking Concepts
- IP Address – Identifies a device on a network
- Port – Entry point for services (22, 80, 443)
- Protocol – Communication rules (TCP, UDP)
- DNS – Resolves domain names to IP addresses
TCP vs UDP
- TCP: Reliable, ordered, error-checked (HTTP, HTTPS, SSH)
- UDP: Fast, connectionless (DNS, streaming, monitoring)
Essential Linux Networking Commands
ip a
ip route
ping google.com
ss -tulnp
netstat -tulnp
curl http://example.com
traceroute google.com
Firewalls and Security
Firewalls control incoming and outgoing traffic.
In Linux, tools like iptables, firewalld,
and ufw are used to secure systems.
DevOps Networking Use Cases
- Reverse proxy and load balancer setup
- Docker and Kubernetes networking
- CI/CD pipeline connectivity
- Monitoring and logging traffic
What You Learned
- Networking fundamentals for Linux
- TCP vs UDP differences
- Common Linux networking commands
- Security and firewall basics
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