Free downloads

Networking Cheat Sheets

Printable reference charts originally from PacketLife.net (now defunct), hosted as free PDFs on The IT Cave cheat sheets page. Use the links below to open or download each file directly.

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Attribution

Jeremy Stretch — originally PacketLife.net · mirrored on The IT Cave

These cheat sheets were created by Jeremy Stretch and originally published on PacketLife.net, where they were offered as free downloads for the networking community. PacketLife.net no longer appears to be active. Because the originals were freely shared, we believe linking to hosted copies elsewhere — such as The IT Cave — is in keeping with that intent. We do not claim ownership; full credit remains with the author, and this page will remove any sheet upon request.

Fundamentals

IPv4 Subnetting

CCNA core

CIDR, VLSM, masks, and classful ranges.

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https://theitcave.com/wp-content/uploads/2025/04/IPv4_Subnetting.pdf

NAT

CCNA core

Static, dynamic, PAT, and troubleshooting.

Download PDF Open PDF

https://theitcave.com/wp-content/uploads/2025/04/NAT.pdf

IPv6

CCNA core

Networking Cheat Sheets

Attribution

Fundamentals

IPv4 Subnetting

NAT

IPv6

IPv4 Multicast

IEEE 802.11 WLAN

QoS

PPP

Common Ports

Physical Terminations

VoIP Basics

Routing

OSPF

BGP

EIGRP

RIP

IS-IS

IOS Interior Routing Protocols

Frame Mode MPLS

Switching

Spanning Tree

VLANs

First Hop Redundancy

Security

IOS IPv4 Access Lists

IOS Zone-Based Firewall

IEEE 802.1X

IPsec

Tools & Reference

Cisco IOS Versions

Wireshark Display Filters

tcpdump

Scapy

Markdown

MediaWiki