OSI & TCP/IP models
All seven OSI layers mapped to TCP/IP, with PDUs, protocols, encapsulation, TCP vs UDP, bottom-up troubleshooting commands and attacks by layer.
CCNA 200-301 v1.1 & v2.0v1.0 · Sep 28, 2026
edge# show cheat-sheets
Cheat sheets
One page, one topic, readable in under two minutes. Open a sheet on the web or download a print-ready PDF for your desk. Built for CCNA, Security+ and A+ study and for the first years on a help desk or NOC.
Available now
Common ports & protocols
32 ports to know, grouped by job, with cleartext-to-secure swaps, port ranges, listening-port commands and firewall rules of thumb.
CCNA, Network+ and A+ Core 1v1.0 · Sep 28, 2026
IPv4 subnetting & VLSM
Subnet chart from /8 to /32, the 4-step method to solve any IP, a worked VLSM plan, special address ranges and the commands to check addresses.
CCNA 200-301 topic 1.6v1.0 · Sep 28, 2026
IPv6 essentials
IPv6 address anatomy and shortening rules, address types, Neighbor Discovery, SLAAC and EUI-64, IPv4 differences, Cisco commands and security basics.
CCNA 200-301 topics 1.8 and 1.9v1.0 · Oct 3, 2026
Cisco IOS CLI essentials
IOS command modes, help keys, show commands, a secure SSH baseline, interface status meanings and how to save and recover.
CCNA 200-301, Cisco IOS and IOS XEv1.0 · Oct 19, 2026
VLANs & 802.1Q trunking
The 802.1Q tag, VLAN ranges, DTP trunk negotiation, access and trunk configuration, inter-VLAN routing and VLAN hopping defenses.
CCNA 200-301 topics 2.1 and 2.2v1.0 · Oct 19, 2026
STP/RSTP & EtherChannel
How STP elects a root and blocks ports, bridge ID, port costs, STP vs RSTP, PortFast and BPDU Guard, and LACP or PAgP EtherChannel.
CCNA 200-301 topics 2.4 and 2.5v1.0 · Oct 19, 2026
ACLs & wildcard masks
Wildcard masks, how an ACL decides, standard vs extended ACLs, a named extended example, vty lockdown and how to check hit counts.
CCNA 200-301 topic 5.6v1.0 · Oct 19, 2026
Security fundamentals & key terms
The CIA triad, AAA and MFA, risk terms, control types, design principles, the six NIST CSF 2.0 functions and key terms.
Security+, CC and CySA+v1.0 · Oct 3, 2026
Nmap scanning
How a SYN scan reads a port, ready-made recipes, options by job, NSE script risks, timing templates and a pre-scan checklist.
Security+, CySA+ and PenTest+v1.0 · Sep 28, 2026
Wireshark display filters
Display filter anatomy, operators, everyday filters, troubleshooting filters and security hunting filters, with capture vs display filter rules.
Wireshark 4.x, Security+ and CCNAv1.0 · Sep 28, 2026
Linux security commands
Linux permissions, account and login checks, listening ports, risky files, log searches, and a ufw and SSH hardening baseline.
Security+ and Linux+v1.0 · Oct 19, 2026
Troubleshooting methodology (CompTIA 7 steps)
The CompTIA troubleshooting steps, questions to ask, ways to find the cause, a ticket note template, escalation checklist and priority matrix.
CompTIA A+ and Network+ N10-009v1.0 · Sep 28, 2026
Windows CMD & Run commands
Run-box launchers, network, repair and process commands, and a danger zone of commands that erase data.
CompTIA A+ Core 2 (220-1202)v1.0 · Sep 28, 2026
PowerShell for help desk
How PowerShell commands read, plus account, PC, network and event log commands, ticket recipes and safe-use rules for help desk work.
CompTIA A+ Core 2 and Windows 10/11v1.0 · Oct 3, 2026
Prompt anatomy (role, task, context, format)
The 6 parts of a strong prompt, a before and after example, power techniques, how to iterate and how to use AI safely.
Claude, ChatGPT and Geminiv1.0 · Sep 28, 2026
Prompt patterns (few-shot, step-by-step, structured output)
Six prompt patterns (few-shot, step by step, structured output, critique, chaining, ask first), when to use each, how to stack them and how to use them safely.
Claude, ChatGPT and Geminiv1.0 · Oct 3, 2026
Roadmap
40 sheets in three release waves, 17 live so far. Published sheets link to their page; the rest are on the bench.
NETNetworking12 sheets · 8 live
- NET-01OSI & TCP/IP modelsw1published
- NET-02Common ports & protocolsw1published
- NET-03IPv4 subnetting & VLSMw1published
- NET-04IPv6 essentialsw2published
- NET-05Cisco IOS CLI essentialsw2published
- NET-06VLANs & 802.1Q trunkingw2published
- NET-07STP/RSTP & EtherChannelw2published
- NET-08Static routing & OSPFv2w3planned
- NET-09ACLs & wildcard masksw2published
- NET-10NAT/PAT, DHCP & DNS servicesw3planned
- NET-11Wireless 802.11 & WLAN securityw3planned
- NET-12Python network automation (Netmiko, REST, JSON)w3planned
SECCybersecurity12 sheets · 4 live
- SEC-01Security fundamentals & key termsw2published
- SEC-02Nmap scanningw1published
- SEC-03Wireshark display filtersw1published
- SEC-04Linux security commandsw2published
- SEC-05Windows & PowerShell for defendersw2planned
- SEC-06Common attacks & mitigations (MITRE ATT&CK)w2planned
- SEC-07OWASP Top 10 web risksw2planned
- SEC-08Incident response lifecyclew3planned
- SEC-09Cryptography & hashingw3planned
- SEC-10Host firewalls (ufw, nftables, Windows Firewall)w3planned
- SEC-11Log analysis & SIEM queriesw3planned
- SEC-12Risk & compliance frameworks (NIST CSF, CIS, ISO 27001)w3planned
ITIT Support8 sheets · 3 live
- IT-01Troubleshooting methodology (CompTIA 7 steps)w1published
- IT-02Windows CMD & Run commandsw1published
- IT-03PowerShell for help deskw2published
- IT-04Network troubleshooting for help deskw2planned
- IT-05Active Directory & Microsoft 365 account tasksw2planned
- IT-06PC hardware & boot troubleshootingw3planned
- IT-07Linux basics for supportw3planned
- IT-08ITIL, tickets & user communicationw3planned
AIAI & Prompt Engineering8 sheets · 2 live
- AI-01Prompt anatomy (role, task, context, format)w1published
- AI-02Prompt patterns (few-shot, step-by-step, structured output)w2published
- AI-03Prompts for IT & networking tasksw2planned
- AI-04AI security risks (OWASP LLM Top 10)w2planned
- AI-05Checking AI output & hallucinationsw3planned
- AI-06AI glossary (tokens, context, RAG, agents)w3planned
- AI-07Calling AI APIs with Pythonw3planned
- AI-08Data privacy & responsible AI usew3planned
% No cheat sheets match. Try another word or pick all.