Category: Word from the author

ICANN and the future of DNS and internet

I’m sorry to put here something that is not really technical but for a blog with the name “howdoesinternetwork.com” it would be strange not to follow the story about the future of DNS governance given the fact that DNS is a crucial part of internet functionality.

You probably know how the internet works given the fact that you are visiting a blog like this. Regardless of that, it will not hurt to explain in few words the importance of DNS (Domain Name System) for a normal internet operation.

Let’s surf to se how this works

If you want to open this webpage or send an email to someone, you must enter a destination to your computer so it could know where to sent your stuff. As you are most surely a human, being, you would like to use a name like google.com for opening a webpage or an e-mail address in order to send a message to your colleagues (rather than some strange numbers separated by dots or colons). Almost all humans are like that and they want to use names and addresses. Computers, on the other hand, know to reach each other only by IP addresses.

You can see that we needed someone to take the role of the “address book” as soon as we got the internet.

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Why numbering should start at zero?

Please note:

This has nothing to do with networking in particular! Not if you look from only one perspective. If you look from totally different perspective, with Cisco ACI and all other SDN solutions, you will probably meet with Python programming language (because you will) and then, somewhere in beginning of Python exploration this is the first question that will cross your mind. Of course, if you think like me!

Although not directly related to networking, the question bothered me for some time now and the answer is not only really logical when you read it but it is also given by a cool guy named prof.dr. Edsger W. Dijkstra

For almost every networking geek it will be enough to read through it.

Intro

After getting the CCIE I found the next thing I wanted to get my hands around. Python. As it seems, Cisco ACI fabric will be the next big thing in Cisco world. Other vendors all have something about SDN to offer these days. Most important part for us, networking engineers, is that they want us to give up the CLI and get us to use Python and REST calls to speak with our network equipment. Python was the logical next step.

I signed and passed Dr. Chuck’s Coursera Python class:

And got some books:

  • Python for Informatics by Charles Severance (Coursera Professor)
  • Learning Python, Fifth Edition by Mark Lutz
  • Python Pocket Reference, Fifth Edition by Mark Lutz
  • Fluent Python by Luciano Ramalho

After first few great lectures on Coursera by Dr.Chuck the question was born!

The Question

So my questions arose: “Why the hell in Python slices and range exclude the last item?”, “Why?”, “It’s not logical to me!”

The Answer

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I became CCIE# 46173

This is the story on how I became CCIE# 46173

To be honest, when I look back, I do not really know the main reason behind going through all this trouble, but I can tell you the story about how I did it. It’s mostly a thriller, and some drama towards the end. I will give you an overview of the whole process including the materials used, videos watched, books read and struggles that I went through.

I think that is the right thing to do. This article is for all of you out there who are still trying to study for this exam and need some suggestions. One of the most important things for me was to gather others candidate experience and suggestions in making a good study plan and get the info about the books and stuff. This is also a perfect occasion to brag about passing the damn thing and write a bit about myself. On technology blog, this is a rare opportunity when is alright to write a self reflection.

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CCIE RS v5 blueprint will be announced this month?

CCIE lab v5Please note that this article is more or less pure speculation. The fact is that CCIE R&S v5 blueprint will be presented 28th January 2014 on Milan’s Cisco live event everything else is yet to be announced.

From Milan’s Cisco live 28.1.2014 there is an CCIE R&S v5 blueprint event scheduled. When Cisco wants to speak about new CCIE lab blueprint on Cisco live it means that this blueprint will be announced prior to that event (couple of months before). That leads us to the conclusion that there will be new blueprint announcement this month. There is a big possibility that predictions about changes written in my article about CCIE v5 blueprint here should be changed for the lab exam somewhere around April 2014. Everything in details will be described on that event where Cisco will give out all the details of changes in new CCIE lab v5 blueprint.

There was a chance of announcement this summer when I was following Cisco Live in Orlando. After the event went through it was obvious that there was no mentions about the CCIE lab blueprint change. Later I was reading some blogs about Cisco’s way of changing the blueprint. From all of them it’s clear that new blueprint is never announced on some Cisco live event. It’s always discussed in detail in first event after the announcement. We have this situation now. There is a Cisco Live event in Milan, Italy in February and there is an CCIE v5 blueprint event scheduled for 28.2.2014. Based on all those information we are almost sure to see the announcement this month.

I am studying for the exam for 6 months now!?!

For us studying for the lab exam, the old topology and all the topics from v4 are still valid but for how long?

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CCIE R&S v5 blueprint announcement?

UPDATE on 2.11.2013 – There will be an update in February 2014!

Read all about the new announcement in the latest article here! with all new topics added and removed from CCIE lab exam v5.

 

 

UPDATE on 23.07.2013 – There will be not update this year to v5 at least not for now…

So, there are some news. The news is that at this moment, few weeks after Cisco Live in Orlando we can say that CCIE lab exam v5 update is not going to happen this year. I other words, for us studying for the lab exam, the old topology and all the topics from v4 are still valid. Many of us will think now that we can be in peace for another year now and try to learn and understand everything so that we can pass the exam before the change. From my perspective, maybe this is not the whole truth. I think that even the change in the exam and all the topics mentioned down here that would change will not necessary mean that the exam would become more difficult. My perspective is that if you are prepared to pass the CCIE lab on v4, you will be probably also prepared to pass it on v5. My point is in that there is so many networking topics covered here that all the changes would not disturb you in your goal, maybe only those people who studied but not really with 100% understanding. The road to CCIE is not short, and is not easy either but it can be fun and in the end it will be worth the effort.

Learn and enjoy the process to, not only thinking on the resulting cert. In that way, you will probably be more succesful even in the CCIE lab changes a bit.

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