A repository of helpful tools selected to aide students learning how to subnet...

Tutorials, Workshops, and Articles:
Easy Subnetting (.pdf)
Adapted from an article originally published on the Internet by Greg Stanley, MCP; rewritten by Beau Sanders; this article is written to help students who need a system to answer subnetting questions for certification exams or college networking courses, where calculators and/or tip sheets are not allowed; the writer assumes that the reader is familiar with subnetting theory and knows how to count in binary at least to 16 bits; included in the Subnetting Workshop handout listed below
Seven Steps to Subnetting (.pdf)
Excerpt from MCSE Guide to Microsoft® Windows 2000® Networking Certification Edition, written by Kelly Caudle, Walter J. Glenn, and James Michael Stewart; published by Course Technology
Handout from Subnetting Workshop (.pdf)
A collection of very helpful articles on subnetting, including "Easy Subnetting" and "Subnetting 1 2 3", as well as several subnetting hands-on exercises
Answer Key for Handout from Subnetting Workshop (.pdf)
Here are the answers to the hands-on exercises in the handout above
Subnet Workshop Audio File - Part 1 - 35 minutes (.mp3)
Subnet Workshop Audio File - Part 2 - 65 minutes (.mp3)
Audio from Subnetting Workshop held in January 2008; listen to this lecture while following along in the handout above; does not include discussion of exercises at end of handout; this lecture was recorded during a class at Greenville Tech
Subnet Workshop Worksheet (.pdf)
Blank Subnet Worksheet used in our Subnetting Workshop (.pdf)
Subnetting 1 2 3 (.pdf)
Written by Adam Chee, this tutorial article walks the reader through Mr. Chee's system for subnetting during networking exams; included in Subnetting Workshop handout listed above

IP Subnetting, Variable Subnetting, and CIDR (Supernetting)
Excellent article on subnetting
IP Variable Length Subnet Masking (VLSM)
Learn how to subnet a subnet and better manage address space when networks have varying number of host requirements
Quick and Dirty Subnetting (pdf)
A simple two page tutorial on how to subnet from PrepLogic

Learn to Subnet (pdf)
A five page whitepaper on learning how to subnet from PrepLogic
Subnetting Web Sites:
Free account available. Site offers Pro account for a small fee. Subnetting.net is full of free tools designed to help you learn and master subnetting. Check out the Video and Written Tutorials, Practice Questions, and the Subnetting Game to hone your skills. If you're studying for the CCENT or CCNA exam, the Pro Account provides many additional features including CCENT/CCNA Videos, Labs, and Practice Questions.

An excellent online resource for all things related to subnetting; includes several excellent subnet calculators
Subnetting Secrets - Learn the Easy Way to Subnet
Fee charged for this course. Learn subnetting in 15 seconds flat with my subnetting cheat sheet in this subnetting tutorial.

Subnet Calculators and "Cheatsheets":
Solarwinds.net Free Advanced Subnet Calculator
One of the best free subnet calculators found on the Internet; click on the "Download Adv Subnet Calculator Now", complete the contact form, and follow the online instructions
TCP/IP Cheatsheet v2.1 (.pdf)
Handy collection of test taking aides from Boson Software

Subnet and IP Cheatsheet (.pdf)
Harvested from SubnetOnline.com, this is a detailed cheatsheet for advanced subnetters

Subnetting Tip Sheet (.pdf)
A homemade CCNA tip/cheatsheet that collects the most important subnet details on one page