Your confidence as a Cisco engineer comes from knowing how your network works and not from just making off the cuff changes and praying they work. In this department you are going to learn the nuts and bolts of IP addressing, wildcard masking and basic design and then build up your knowledge to well past CCNA level.
Imagine how valuable you will be to any company when you can not only only configure the network but explain to your colleages and senior management what you did and how you did it.
IP Addressing and Subnetting Introduction This information will come in handy every day for you in your role as a network engineeer.
Everything You Need To Know About Subnetting Can you subnet in your head yet?
Subnetting Question Generator Test your subnetting knowledge with this cool FREE tool. Please pass it onto your friends.
Subnetting Cheat Chart You will need to use this when performing quick networking design or subnetting questions
IP Subnet Calculator The coolest tool you will ever use!
'Easy Way to Subnet' Videos 20 high quality tutorials showing you the easy way to subnet
'Designing Subnets' Videos 3 Tutorials showing you how to design subnets
'Wild Card Mask' Videos 3 Videos on Wildcard Masks
VLSM and Route Summarization Updated info for the CCNA Exam