Technology Fundamentals
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Your Networking Fundamentals apply directly on Linux — with a few key commands.
ip a / ip route — view addresses and routing (the modern replacement for ifconfig).ss -tulpn — see listening ports and connections (replaces netstat).ssh user@host — secure remote access, the backbone of Linux administration.ufw (Ubuntu) or firewalld (RHEL) apply default-deny, least-privilege rules.Secure remote access and host firewalls tie into cloud networking and Security+.
How this topic actually shows up in interviews — and how to demonstrate you understand it.
Linux hosts are everywhere in networks and the cloud; employers expect basic network troubleshooting.
ss -tulpn to list listening ports and the owning process.
Show SSH keys, disabling password/root login, and firewall rules.
Expected answer: Check the service is listening (ss), the host firewall (ufw/firewalld) and routing (ip route).
Where this knowledge takes you — the jobs, skills and certifications it feeds into.
Networking + Linux Fundamentals → cloud/network/security roles.
That you can navigate, administer and troubleshoot Linux from the command line.
Use ip a (and ip route for routing) — the modern replacement for ifconfig.
A secure protocol for remote command-line access and file transfer — the standard way to manage Linux servers.
Use ss -tulpn (the modern replacement for netstat).
Practise what you've learned
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