Jan
03
Continuing my review of titles from Petr’s excellent CCDE reading list for his upcoming LIVE and ONLINE CCDE Bootcamps, here are further notes to keep in mind regarding EIGRP. About the Protocol The algorithm used for this advanced Distance Vector protocol is the Diffusing Update Algorithm. As we discussed at length in this post, the metric is based upon Bandwidth and Delay values. For updates, EIGRP uses Update and Query packets that are sent to a multicast address. Split horizon and DUAL form... Read More
Dec
30
To start my reading from Petr's excellent CCDE reading list for his upcoming LIVE and ONLINE CCDE Bootcamps, I decided to start with: EIGRP for IP: Basic Operation and Configuration by Russ White and Alvaro Retana I was able to grab an Amazon Kindle version for about $9, and EIGRP has always been one of my favorite protocols. The text dives right in to none other than the composite metric of EIGRP and it brought a smile to my face as I thought about all of the misconceptions I had regarding... Read More
Dec
01
Catalyst switch port security is so often recommended. This is because of a couple of important points: There are many attacks that are simple to carry out at Layer 2 There tends to be a gross lack of security at Layer 2 Port Security can guard against so many different types of attacks such as MAC flooding, MAC spoofing, and rouge DHCP and APs, just to name a few I find when it comes to port security, however, many students cannot seem to remember two main points: What in the world is Sticky... Read More
Oct
18
Well I finally did it!  After a year and half of studying practically every day I am happy to say I am CCIE #27143!  I am proud to say I failed the exam 4 times, I wear each one like a badge of honor.  And for $1,400 each, those badges are made of a rare gold/titanium/diamond composite material, they are beautiful.  My road to becoming a CCIE had many unexpected twists and turns.  I got my CCNA back in 2002.  I studied for 2 months and passed it on my 1st try, so I must be pretty darn good... Read More
Oct
17
For Part 2 of this series - click here. Read More
Oct
14
Click here for Part 1 of this series. Read More
Oct
08
Once I catch my breath and look back at one of our popular INE courses like the CCNA Wireless course, I can delve a bit deeper into certain subjects that we did not have time for in the course. This is one of those moments. Let us get more detailed about Cisco's implementation of Radio Resource Management (RRM) in the Cisco Unified Wireless Network architecture. In today's wireless LAN infrastructures, of course users want more and more bandwidth in a greater and greater coverage area. This is... Read More
Oct
02
Thanks to Randy of our CCNA program for this suggestion. Randy wanted some guidance on how to solve the subnetting questions in ICND1 and ICND2 very quickly. The ability to do this is often the difference between a passing score and a failed attempt. WARNING: You must master subnetting using our course or some other trusted materials before you start using these shortcut approaches. It is a common issue for Cisco candidates to move directly to subnetting shortcuts for the exams without fully... Read More
Sep
24
Encoding and Modulating Questions Only What form of CSMA does 802.11 use? What does DCF stand for? Your wireless station heres someone transmit and waits the duration heard plus what value? What logically seperates WLANs? Name three requirements to roam between two autonomous APS. Read More
Sep
07
One of our CCNA students requested some command practice for ICND2 - here is one I put together for him. Please give me feedback in the comments if you find practice tools like this helpful. Read More

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