69 related command entries are available in Commands.
Networking and Remote Access
Addresses, DNS, routes, ports, firewalls, and remote access.
Networking
Networking and Remote Access
Use Networking when you need connectivity, name resolution, reachability, and remote-access workflows to feel like one connected system.
This domain is public-ready across Learning, Practice, Troubleshooting, and Reference.
What you will learn
- Separate addressing, routing, DNS, and service reachability clearly
- Use layered diagnostics instead of one-command superstition
- Understand remote access as exposure control, not just connectivity
Coverage in this domain
Best when you want to troubleshoot connectivity step by step instead of memorising isolated commands.
Lesson order
Start at the top and move forward if you want the full learning path for this domain.
Lesson 1 Networking
Network Model: How Networks Work Understand the basic networking model of identity, local scope, routing, and name resolution so common network problems feel explainable instead of mysterious. Lesson 2 Networking
Network Config: GUI Inspect network settings in graphical tools and understand when a static IP is appropriate versus when DHCP should remain in control. Lesson 3 Networking
Network Config: CLI Inspect network state from the command line and treat live configuration changes with enough caution to avoid breaking access unexpectedly. Lesson 4 Networking
SSH Foundation Master the Secure Shell (SSH) protocol to securely connect to remote servers, and implement key-based authentication to eliminate passwords. Lesson 5 Networking
DNS Deep Dive Inspect DNS resolution directly so you can separate naming problems from connectivity problems and understand local overrides such as the hosts file. Lesson 6 Networking
Network Diagnostics Troubleshoot network problems layer by layer using connectivity tests, route tracing, DNS checks, and port inspection. Lesson 7 Networking
Firewall: GUI and CLI Understand what a host firewall does, inspect common firewall tools, and make only deliberate, minimal rule changes in the right context. Lesson 8 Networking
Network Lab: Full Connectivity Debug Use a layered troubleshooting sequence to diagnose a broken connection without guessing, skipping layers, or changing settings too early. Lesson 9 SysAdmin
Remote Access: Advanced Use safer remote-access patterns for SSH, RDP, and PowerShell remoting, and understand why bastion hosts and VPNs reduce exposure. Practice this domain NETWORK & COMMUNICATION
Interfaces and IP Addresses
Identify local network interfaces and addresses so you can tell which interface is active and which address actually matters for the current network path.
Networking and Communication Ping and ReachabilityUse ping to test reachability in a more structured way, separating local stack checks, gateway checks, and broader connectivity checks.
Networking and Communication DNS and Name ResolutionQuery DNS directly and recognize when a hostname problem is different from a reachability problem.
Networking and Communication Ports and ConnectionsInspect listening ports and active connections so you can tell whether a service is actually waiting for traffic.
Networking and Communication Fix related problems
Cannot Reach a Remote Host
Use this when a remote system or service cannot be reached and you need to separate naming, routing, firewall, and service reachability.
Internet and Network DNS Works by IP but Not by NameUse this when direct IP connectivity works but hostnames do not resolve or connect correctly.
Internet and Network SSH or Remote Session Keeps FailingUse this when remote login fails and you need to separate network path, listening service, authentication, and policy restrictions.
Internet and Network Reference quick access
Inspect Open Ports and Listening Services
Check which ports are listening, which process owns them, and whether that actually matches the service you expect.
Task guide Test DNS and Connectivity Step by StepSeparate DNS, reachability, routing, and service checks instead of calling everything a network problem.
Task guide DNS and Network Request FlowUnderstand name resolution, routing, service reachability, and firewall checks as one layered network path.
Flow map Remote Access and Firewall Exposure MapSee how remote access depends on addresses, listening services, firewall policy, and exposed trust boundaries.
System map