PingLabz has grown to more than 758 articles, 60+ free CCNA labs, and 29 complete topic guides. That is a lot of content, and if you just landed here, it is fair to ask: where do I start? This page is the map. Every tutorial on this site is grounded in real Cisco IOS XE and NX-OS output captured live in Cisco Modeling Labs (CML) - no simulator screenshots, no fabricated show commands. Pick the path below that matches where you are today, and it will walk you through the site in the right order.
Last updated: August 19, 2026. This page is refreshed weekly as new content publishes.
New Here? Read These 5 First
If you want a feel for how PingLabz teaches before committing to a full path, start with these five. They cover the site's core promise: real labs, real output, and explanations that connect theory to what you actually see on screen.
Choose Your Path
Most readers fall into one of five groups. Find yours and follow the steps in order - each path is sequenced so every article builds on the one before it.
Path 1: I'm New to Networking
Start with the fundamentals cluster. These articles assume zero background and build the vocabulary and mental models everything else depends on.
Path 2: I'm Studying for the CCNA
This is the biggest reader group on the site, and the deepest content track. The 60-lab library maps directly to the CCNA 200-301 exam domains, and every lab runs on the free tier of Cisco Modeling Labs.
Path 3: I'm a Working Engineer Going Deeper
Skip the basics and go straight to the complete guides. Each one is a full reference for its protocol, from fundamentals through enterprise design, hardening, and troubleshooting, with a reading-order index of every deep-dive article in that cluster.
Path 4: I Want to Build a Home Lab
Everything on this site runs in Cisco Modeling Labs, and the free tier is enough for most of it. This sequence takes you from nothing to a working lab.
Path 5: I'm Focused on Network Security
Three clusters cover the security side of the house: port-based access control, the ASA firewall, and network reconnaissance.
The Complete Guides: Every Topic Pillar
Each guide below is the hub for its topic cluster. It explains the protocol end to end, shows a minimum viable configuration on Cisco IOS XE with real show output, and indexes every deep-dive article in reading order. Bookmark the ones you work with. If you would rather browse by subject than by cluster, the Topics index lists every tag on the site, ordered by how much has been written about it.
Fundamentals
OSI and TCP/IP, subnetting and VLSM, switching concepts, architectures, PoE, and virtualization.
Routing and WAN
The routing table, administrative distance, longest prefix match, and static routes.
Link-state routing: LSAs, areas, DR/BDR, cost tuning, and enterprise design.
The internet's routing protocol: attributes, best path, filtering, and RPKI.
DUAL, feasible successors, K values, and named vs classic mode.
Labels, LDP, L3VPN with MP-BGP, and segment routing.
Overlay/underlay, OMP, Catalyst SD-WAN architecture, and MPLS migration.
Tunnel config, MTU pitfalls, GRE over IPsec vs IPsec over GRE, and DMVPN intro.
Address types, the header, and IOS XE configuration.
Classification, marking, queueing, and MQC on Cisco IOS XE.
PIM sparse mode, IGMP, RPF checks, SSM, and multicast troubleshooting.
mGRE plus NHRP, Phase 1 / 2 / 3 behaviour, IPsec profiles, and dual-hub design.
IKEv1 and IKEv2, crypto maps vs VTI, NAT traversal, and phase-by-phase troubleshooting.
Switching and Campus
Tagging, trunking, inter-VLAN routing, VXLAN, and L2 security.
Root bridges, RSTP, MST, guards, and campus hardening.
HSRP, VRRP, and GLBP: first-hop redundancy compared and configured.
VXLAN and BGP EVPN, LISP, SD-Access fabric roles, and choosing a segmentation layer.
Data Center
Spine-leaf on NX-OS: vPC, the OSPF underlay, BGP EVPN route types, VXLAN L2VNI and L3VNI, and anycast gateways.
Services and Automation
NAT, NTP, SNMP, syslog, DHCP relay, and TFTP/FTP with real IOS XE output.
SDN, REST APIs and JSON, Ansible, and AI in network operations.
Security, Wireless, and Tools
CoPP, uRPF, AAA with TACACS+ and RADIUS, MACsec, IPv6 first-hop security, and management-plane hardening.
Port-based NAC with Cisco ISE: EAP methods, dACLs, CoA, and deployment.
Security levels, NAT, site-to-site and AnyConnect VPNs, and failover.
The full 9800 series: architecture, config model, RRM, roaming, and troubleshooting.
Host discovery, scan types, version detection, NSE, and evasion.
TCP and UDP throughput testing, jitter and loss, window tuning, and slow-path troubleshooting.
ICMP mechanics, every failure message decoded, MTU testing, and sweeps.
Zone transfers, subdomain brute forcing, and the Kali DNS recon toolset against a live zone.
tcpdump and Wireshark, capture and display filters, reading a handshake, and proving where the packets stop.
ip, ethtool, ss, traceroute, mtr, dig, curl, netcat, socat, SSH, tshark and ngrep for network engineers: the 2026 field reference and free printable cheat sheet, routing and neighbor tables, NIC offloads, DNS resolution, path and MTU testing, socket state, port checks, tunnels, packet analysis and host firewalling from the terminal.
Hands-On Lab Libraries
Reading builds familiarity; labs build skill. Every lab below includes the topology, full configs, verification steps, and the real output you should see. Start at the labs hub for the full picture, or jump into a library directly.
Sixty labs across all five CCNA 200-301 domains, in exam order.
Ticket-driven break/fix scenarios, from L1 symptoms to a full branch outage capstone.
Netmiko, JSON, REST APIs, and Ansible: seven labs from first script to config drift detection.
The all-in-one capstone campus: every CCNA domain in a single topology.
Four expert-level super labs: enterprise core, SP handoff, ticket gauntlet, and overlay plus automation.
Build a Catalyst 9800-CL wireless lab in CML, from day 0 config onward.
Key terms for every exam domain, built for spaced repetition between labs.
Free Cheat Sheets and References
Printable field references built from the same cluster content, designed to sit next to your keyboard.
How PingLabz Is Different
Every configuration and every line of output you see on this site was captured from a live lab: Cisco IOS XE devices running in Cisco Modeling Labs, plus a real Debian VM bridged into the topology for the Linux-side tooling (ping, Nmap, Python automation). When an article shows a show ip ospf neighbor output or a failed ping with Packet filtered, that is what actually came back from the device. Nothing is mocked up or pasted from documentation.
That matters because the details are where troubleshooting lives. Real output includes the timers, the flags, and the occasional surprise that sanitized examples edit out. If you build the same lab, you will see the same thing, and the articles tell you exactly how to build the same lab.
New articles publish weekly across the clusters, and this page is updated as they land. If you want the new stuff as it ships, subscribe for free and it comes to your inbox.
Frequently Asked Questions
Where should I start if I know nothing about networking?
Follow Path 1 above, in order. It starts with TCP/IP and the OSI model, then moves through devices, routing, and VLANs. After those six pieces you will be ready for the CCNA track or any of the complete guides.
Are the labs free?
The lab platform is: Cisco Modeling Labs has a free tier that runs everything the core CCNA labs need. Most lab write-ups on the site are free to read; some advanced content is for members. Each lab page is marked clearly.
What do I need to run the labs myself?
A machine that can run CML (a spare PC, a small server, or an ESXi host) and the free CML license. The CML installation guide and lab nf-01 take you from zero to your first running topology.
In what order should I study for the CCNA?
Follow Path 2: set up CML first, then work the 60-lab library in its published order (network fundamentals, network access, IP connectivity, IP services, security). Use the flashcards between sessions, the troubleshooting labs to test yourself, and the Mega Lab as your final rehearsal.
How often is new content published?
Weekly. New articles are added to their cluster's complete guide and to this page, so checking here (or subscribing) is enough to stay current.
Key Takeaways
Pick one path and follow it in order rather than sampling randomly; the sequencing is the value. Use the complete guides as your long-term references and the lab libraries to turn reading into skill. Everything runs on the free tier of Cisco Modeling Labs, and everything you see on screen here is real output you can reproduce. When in doubt, start with lab nf-01 and build from there.