Posts from ‘IP Addressing’
As you may have noticed, INE does a wide variety of training in the Cisco space. 
This blog post goes out to all those folks who have recently begun their Cisco training.
This month we delivered new live classes on CCNA and CCNP. We are excited for and encourage our students at every level in their journey. In that light, we have gathered a collection of Videos Answers, targeted at the CCNA level, with a few topics leaking into security and CCNP. These videos were primarily created as quick (under 10 minutes each) Video Answers to questions that various learners have had.
Take a look at the list of topics, and if there are 1 or 2 you feel you would benefit from, feel free to enjoy them.
Here are a few of the topics (in no particular order):
- How the network statement really works in IOS
- Setting up SSH
- Initial commands for sanity sake
- NAT with overload
- Router on a stick
- VRFs Continue Reading
Overview
In this short blog post we are going to present a simple procedure for IPv4 prefix summarization. The procedure is based on the one found in “Optimal Routing Design” book by Russ White, Don Slice and Alvaro Retana, but differs in some respects. The process is three step, and require the use of Windows calculator for ease of computation. No binary breakdowns are involved, just some basic arithmetic. For the sake of simplicity, we skip all proofs, as those are trivial. The same approach could be adopted for use with IPv6 prefixes, provided that decimal arithmetic is replaced with hexadecimal.
Scenario
We are going to use an example to demonstrate the method. Here is the task: find the optimal (longest prefix length) summary prefix for the following set of subnets:
192.168.100.0/22 192.168.101.0/24 192.168.99.0/24 192.168.102.0/24 192.168.105.0/24 192.168.98.0/23
This example is taken from the wikipedia article: http://en.wikipedia.org/wiki/Supernet that illustrates the use of binary breakdown for the purpose of address summarization.
Continue Reading
One of community members found this great subnetting practice page. Enjoy!
Tags: addressing, ip, practice, strategy, subnetting, tips
Some things never change. CCENT and CCNA candidates still have the roughest time in the curriculum with the topic of subnetting.
Hey! No problem! We have all been there. Just remain patient, remain calm, and keep working through examples and practice problems.
Do you want a quick quiz to see if your skills are up to speed? Check out this blog post:
Let’s walkthrough a common subnetting question type in this blog entry. Here is the question, followed by how I would solve it in the written exam on my scratch paper.
“You run the ipconfig command and discover your IP address and subnet mask are: 172.16.129.180/255.255.255.128. What is your network address?”
Tags: practice, strategy, subnetting, tips
We see our students at all levels sometimes struggle building a network from the “ground-up” using a logical topology diagram. Let us use this blog post to examine a portion of a logical diagram and discuss how one could most easily and accurately setup the network.
CCENT candidates are always starving for IP subnetting practice questions to ensure their skills are ready for the CCENT exam! This practice quiz is sure to help. Grab your pencil and scratch paper and have fun! Click the link below to begin the quiz:
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